{ "schema": 1, "title": "The shape of Bryce", "models": [ { "id": "wall-street", "name": "Wall Street", "group": "Inside the amphitheater", "center": [ -112.16635, 37.6212 ], "width_m": 320, "priority": 1, "source_ids": [ "nps-navajo", "nps-sunset" ], "question": "How much of a narrow passage can an aircraft see?", "interaction": "returns", "theme": "A gap between walls", "view_yaw": 1.1, "view_pitch": 0.74, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "surface_method": "upper-envelope", "geometry_status": "Derived from measured airborne returns; upper-envelope terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2300, "center_utm": [ 397071.2696665937, 4164427.2992813718 ], "bounds_utm": [ 396911.2696665937, 4164267.2992813718, 397231.2696665937, 4164587.2992813718 ], "bounds_wgs84": [ -112.16818527973027, 37.61974020971908, -112.16451479025862, 37.62265976393044 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. 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This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 534, "height": 534, "bytes": 103996, "sha256": "396a3aad85f35e8ae55a4e836f1eaa892c3eebe9ebef40dee57fd89d84ad3e81", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 75970, "sha256": "65a5fb23aada597e578e9eb1a8965ddb57bab74b8e86cd28690ec02284a4d3e4", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "A narrow passage cuts between tall fins of limestone. Seen from above, its enclosed shape is much easier to understand.", "body": "Wall Street is one side of the Navajo Loop below Sunset Point. Here the form of the space matters as much as the standing rock: nearby walls can hide the floor from an airborne instrument. Turn the model, then compare it with the laser returns to see what was actually sampled.", "lesson": "Brown points are other returns; gray points were classified as ground by the source survey. Green points are vegetation candidates identified by this pipeline. Color is an explanatory overlay, not a rock classification. The spaces between points are not evidence of empty air.", "limit": "The slot floor, overhangs and trunks are incompletely sampled. This is an above-rim study of Wall Street, not a walkable model or a scan of its hidden walls.", "caption": "The Wall Street crop in an oblique model view. The open passage lies between the surrounding fins; material and lighting are illustrative." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:44:54.567605+00:00", "source_pixels_m": 0.6, "export_pixels": 534, "export_pixel_m": 0.599250936329588, "crs": "EPSG:32612", "requested_bounds": [ 396911.2696665937, 4164267.2992813718, 397231.2696665937, 4164587.2992813718 ], "export_extent": { "xmin": 396911.2696665937, "ymin": 4164267.2992813718, "xmax": 397231.2696665937, "ymax": 4164587.2992813718, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195950, "Name": "m_3711231_ne_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711231NE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A396911.2696665937%2C%22ymin%22%3A4164267.2992813718%2C%22xmax%22%3A397231.2696665937%2C%22ymax%22%3A4164587.2992813718%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=396911.2696665937%2C4164267.2992813718%2C397231.2696665937%2C4164587.2992813718&bboxSR=32612&imageSR=32612&size=534%2C534&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=396911.2696665937%2C4164267.2992813718%2C397231.2696665937%2C4164587.2992813718&bboxSR=32612&imageSR=32612&size=534%2C534&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "5bc92e797f414dd5a730b04a17d45922c6ab4dd9bcbfd40c674848ec29d0da38", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-navajo", "url": "https://www.nps.gov/thingstodo/navajo-loop-trail.htm", "title": "Navajo Loop Trail", "publisher": "National Park Service", "date": null, "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; no page photograph reused", "supports": "Wall Street and Two Bridges are the two sides of Navajo Loop; narrow limestone walls and Douglas-fir context. No current trail status is asserted." }, { "id": "nps-sunset", "url": "https://www.nps.gov/places/000/sunset-point.htm", "title": "Sunset Point", "publisher": "National Park Service", "date": "2026-08-15", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "Sunset sector, Thor’s Hammer below the viewpoint, Silent City to the south, Claron color interpretation." } ] }, { "id": "silent-city", "name": "Silent City", "group": "Inside the amphitheater", "center": [ -112.1678, 37.6192 ], "width_m": 512, "priority": 1, "source_ids": [ "nps-inspiration", "nps-sunset", "usgs-geonames" ], "question": "When do separate spires read as a continuous wall?", "interaction": "section", "theme": "Rows become a city", "view_yaw": 1.25, "view_pitch": 0.68, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "surface_method": "upper-envelope", "geometry_status": "Derived from measured airborne returns; upper-envelope terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2280, "center_utm": [ 396940.5434636347, 4164206.9889723337 ], "bounds_utm": [ 396684.5434636347, 4163950.9889723337, 397196.5434636347, 4164462.9889723337 ], "bounds_wgs84": [ -112.17073644416783, 37.61686428896943, -112.16486373498562, 37.621535643584316 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. 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Highest retained return per nearest grid node; nearest interpolation up to 3 m; isolated spikes exceeding all 8 neighbors by 6 m lowered to neighbor maximum. No morphological closing.", "vegetation": "Source classes 3/4/5 plus low-intensity multiple echoes and low-intensity raised returns over nearby gentle classified ground are excluded. This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 854, "height": 854, "bytes": 250174, "sha256": "13dbf1e93fb0b5da24fac1a4b7e219bf24d282d3838bf376ab323915719ba09f", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 92680, "sha256": "2ce5ded59216027b8fe89dce0a6d225c1b5dc0f0247895eab9fdd9ae2e034399", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "An apparent wall resolves into ranks of fins and spires when the viewpoint changes.", "body": "NPS identifies Silent City below the rim south of Sunset Point. Its dense rows are particularly useful for comparing a plan with an oblique view. Move the section across the model and follow the repeated rise and fall of the upper surface.", "lesson": "The section traces the derived top surface from west to east. Moving it reveals alternating fins and lower passages. Peaks in the profile are sampled geometry; no buried rock layers are inferred.", "limit": "Silent City is an area, not a single surveyed object. The crop is editorial. Thin spires and gaps can be simplified at lower detail, and an upper envelope cannot show their undercut sides.", "caption": "An oblique terrain study of the Silent City sector, showing repeated ridges and lower passages." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:44:58.255974+00:00", "source_pixels_m": 0.6, "export_pixels": 854, "export_pixel_m": 0.5995316159250585, "crs": "EPSG:32612", "requested_bounds": [ 396684.5434636347, 4163950.9889723337, 397196.5434636347, 4164462.9889723337 ], "export_extent": { "xmin": 396684.5434636347, "ymin": 4163950.9889723337, "xmax": 397196.5434636347, "ymax": 4164462.9889723337, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195950, "Name": "m_3711231_ne_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711231NE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A396684.5434636347%2C%22ymin%22%3A4163950.9889723337%2C%22xmax%22%3A397196.5434636347%2C%22ymax%22%3A4164462.9889723337%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=396684.5434636347%2C4163950.9889723337%2C397196.5434636347%2C4164462.9889723337&bboxSR=32612&imageSR=32612&size=854%2C854&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=396684.5434636347%2C4163950.9889723337%2C397196.5434636347%2C4164462.9889723337&bboxSR=32612&imageSR=32612&size=854%2C854&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "d0b3550a3c896eaa0ab40e56c9900094875bef0450edcb2234679a238149b9bc", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-inspiration", "url": "https://www.nps.gov/places/000/inspiration-point-viewpoint.htm", "title": "Inspiration Point", "publisher": "National Park Service", "date": null, "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; no photograph copied", "supports": "Multiple rim overlooks; Silent City rows south of Sunset; nearby upper White and lower Pink Member context. No member contacts are mapped by this model." }, { "id": "nps-sunset", "url": "https://www.nps.gov/places/000/sunset-point.htm", "title": "Sunset Point", "publisher": "National Park Service", "date": "2026-08-15", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "Sunset sector, Thor’s Hammer below the viewpoint, Silent City to the south, Claron color interpretation." }, { "id": "usgs-geonames", "url": "https://carto.nationalmap.gov/arcgis/rest/services/geonames/MapServer/5", "title": "The National Map Geographic Names — Landforms", "publisher": "US Geological Survey", "date": null, "retrieved_at": "2026-10-02", "license": "US Government Public Domain, National Map terms", "supports": "GNIS Silent City feature 1445586 at about -112.16854, 37.61999; the study bounds were corrected to include this published locator. 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Highest retained return per nearest grid node; nearest interpolation up to 3 m; isolated spikes exceeding all 8 neighbors by 6 m lowered to neighbor maximum. No morphological closing.", "vegetation": "Source classes 3/4/5 plus low-intensity multiple echoes and low-intensity raised returns over nearby gentle classified ground are excluded. This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 854, "height": 854, "bytes": 245686, "sha256": "ce9f6b0e6117729e11c04ede6faceb8fffc5d17ef308201713765987aba807b8", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 91062, "sha256": "ac6105fea9c955f5361c7a0b276edd562086395e6d4063288282e99d64aac4cd", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "The relatively continuous plateau gives way to a much more intricate edge.", "body": "Sunset Point overlooks fins, hoodoos and the Navajo descent. This wider crop puts the rim and the beginnings of that descent in one frame. Use a neutral material and move the study light to read the relief without mistaking image shadows for surface shape.", "lesson": "Changing the study light changes shading, not geometry or time. This is a lighting exercise, not a sunrise forecast. Compare it with the aerial color layer, whose shadows were recorded on its own acquisition date.", "limit": "Thor’s Hammer is in this landscape, but its neck is not reconstructed by the upper-envelope surface. 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No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. 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This study concentrates on the nearby rim and slopes. Sweep a west-to-east section from north to south and compare how rapidly the surface drops away at different positions.", "lesson": "Both axes of the section use metres and equal scale. It is a topographic profile through the model, not a stratigraphic column. Its caption reports the position of the cut and the range of the supported surface along it.", "limit": "The NPS discussion of the Pink and White Members describes the landscape; this model does not map their contacts. Apparent aerial color boundaries are not automatically geologic boundaries.", "caption": "The Inspiration Point sector as a model, with the plateau edge and dissected slopes at true vertical scale." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:45:06.095992+00:00", "source_pixels_m": 0.6, "export_pixels": 1067, "export_pixel_m": 0.5998125585754451, "crs": "EPSG:32612", "requested_bounds": [ 396675.14708244835, 4163309.2765191034, 397315.14708244835, 4163949.2765191034 ], "export_extent": { "xmin": 396675.14708244835, "ymin": 4163309.2765191034, "xmax": 397315.14708244835, "ymax": 4163949.2765191034, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195950, "Name": "m_3711231_ne_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711231NE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A396675.14708244835%2C%22ymin%22%3A4163309.2765191034%2C%22xmax%22%3A397315.14708244835%2C%22ymax%22%3A4163949.2765191034%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=396675.14708244835%2C4163309.2765191034%2C397315.14708244835%2C4163949.2765191034&bboxSR=32612&imageSR=32612&size=1067%2C1067&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=396675.14708244835%2C4163309.2765191034%2C397315.14708244835%2C4163949.2765191034&bboxSR=32612&imageSR=32612&size=1067%2C1067&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "5b6c3f6d270ca0b5fb3dddba4afa5e70448e1e46759c7bd3a0dd0e0e2b205551", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-inspiration", "url": "https://www.nps.gov/places/000/inspiration-point-viewpoint.htm", "title": "Inspiration Point", "publisher": "National Park Service", "date": null, "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; no photograph copied", "supports": "Multiple rim overlooks; Silent City rows south of Sunset; nearby upper White and lower Pink Member context. No member contacts are mapped by this model." } ] }, { "id": "bryce-point", "name": "Bryce Point sector", "group": "Along the rim", "center": [ -112.1585, 37.6067 ], "width_m": 640, "priority": 1, "source_ids": [ "nps-bryce" ], "question": "Which surfaces disappear beneath the rim?", "interaction": "returns", "theme": "A rim with hidden rooms", "view_yaw": 1.15, "view_pitch": 0.7, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "surface_method": "upper-envelope", "geometry_status": "Derived from measured airborne returns; upper-envelope terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2280, "center_utm": [ 397744.1889501401, 4162809.934173444 ], "bounds_utm": [ 397424.1889501401, 4162489.934173444, 398064.1889501401, 4163129.934173444 ], "bounds_wgs84": [ -112.16216960898, 37.6037806307382, -112.15483067077805, 37.60961926386637 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. 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This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 1067, "height": 1067, "bytes": 448852, "sha256": "39994df97572aa0a9b40fd3480bcab260224465a68fc64c8539f1bccfaa124af", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 111180, "sha256": "fa3cb48183763dc572cb5d228289424b8ff9ac30da625a160814f1a0eb98b93a", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "The southern rim of the main amphitheater offers a useful lesson in what an overhead survey misses.", "body": "Bryce Point looks north over the amphitheater. NPS also describes cavities called the Grottos in the nearby white limestone. Compare surface and returns here to separate the visible upper rim from the unseen spaces beneath it.", "lesson": "Returns land on surfaces visible to the instrument. A smooth connection in the derived mesh is an interpolation, not proof that a cliff face is solid. The cloud view makes the survey’s uneven sampling easier to inspect.", "limit": "The Grottos and Wall of Windows are contextual reading, not completed 3D cave or arch models. This sector does not resolve their interiors or reconstruct windows.", "caption": "A terrain study around Bryce Point. Hidden alcoves and windows beneath the rim are not reconstructed." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:45:09.522369+00:00", "source_pixels_m": 0.6, "export_pixels": 1067, "export_pixel_m": 0.5998125585754451, "crs": "EPSG:32612", "requested_bounds": [ 397424.1889501401, 4162489.934173444, 398064.1889501401, 4163129.934173444 ], "export_extent": { "xmin": 397424.1889501401, "ymin": 4162489.934173444, "xmax": 398064.1889501401, "ymax": 4163129.934173444, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195950, "Name": "m_3711231_ne_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711231NE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A397424.1889501401%2C%22ymin%22%3A4162489.934173444%2C%22xmax%22%3A398064.1889501401%2C%22ymax%22%3A4163129.934173444%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=397424.1889501401%2C4162489.934173444%2C398064.1889501401%2C4163129.934173444&bboxSR=32612&imageSR=32612&size=1067%2C1067&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=397424.1889501401%2C4162489.934173444%2C398064.1889501401%2C4163129.934173444&bboxSR=32612&imageSR=32612&size=1067%2C1067&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195950%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "cc9c81740564873d0e4a244e43484f4d2d470032337af009a34d547abac9d5c6", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-bryce", "url": "https://www.nps.gov/places/000/bryce-point.htm", "title": "Bryce Point", "publisher": "National Park Service", "date": "2024-10-10", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "Southern viewpoint looking north; Grottos and Wall of Windows context; hidden interiors not resolved by airborne topography." } ] }, { "id": "fairyland-point", "name": "Fairyland Point sector", "group": "Beyond the main bowl", "center": [ -112.1458, 37.6498 ], "width_m": 768, "priority": 1, "source_ids": [ "nps-fairyland" ], "question": "How does a headwater hollow divide into smaller gullies?", "interaction": "section", "theme": "Another amphitheater", "view_yaw": 1.25, "view_pitch": 0.74, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "surface_method": "upper-envelope", "geometry_status": "Derived from measured airborne returns; upper-envelope terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2230, "center_utm": [ 398923.5953702745, 4167578.153981579 ], "bounds_utm": [ 398539.5953702745, 4167194.153981579, 399307.5953702745, 4167962.153981579 ], "bounds_wgs84": [ -112.15020559086409, 37.646297181084925, -112.14139481285395, 37.65330266678555 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. 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This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 1280, "height": 1280, "bytes": 530888, "sha256": "56b055dd61ad507f10d561ee530824385aa50cfd532e145b043059c130a49cc9", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 110250, "sha256": "4736d4867e305693516bdde268b6a7c44d274725f1baafe003388b79a96d174d", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "At the northern end of the rim, another set of hollows and ridges breaks up the plateau.", "body": "Fairyland Point overlooks Fairyland Canyon north of the main Bryce Amphitheater. NPS describes a landscape with a different erosional history from the main bowl. Here the useful comparison is spatial: trace ridges and hollows without assigning an age or rate to an individual feature.", "lesson": "Move the section across the head of the canyon. Compare the connected higher ground with the lower gullies. The model records a surface sampled in 2018; the interaction is not an erosion simulation.", "limit": "This is a bounded sector near Fairyland Point, not the entire Fairyland Loop or Boat Mesa. The broader geologic history comes from NPS interpretation and is not dated by the lidar.", "caption": "The Fairyland Point sector, showing a separate amphitheater near the northern park rim." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:45:15.113302+00:00", "source_pixels_m": 0.6, "export_pixels": 1280, "export_pixel_m": 0.6, "crs": "EPSG:32612", "requested_bounds": [ 398539.5953702745, 4167194.153981579, 399307.5953702745, 4167962.153981579 ], "export_extent": { "xmin": 398539.5953702745, "ymin": 4167194.153981579, "xmax": 399307.5953702745, "ymax": 4167962.153981579, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195984, "Name": "m_3711223_se_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711223SE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A398539.5953702745%2C%22ymin%22%3A4167194.153981579%2C%22xmax%22%3A399307.5953702745%2C%22ymax%22%3A4167962.153981579%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=398539.5953702745%2C4167194.153981579%2C399307.5953702745%2C4167962.153981579&bboxSR=32612&imageSR=32612&size=1280%2C1280&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195984%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=398539.5953702745%2C4167194.153981579%2C399307.5953702745%2C4167962.153981579&bboxSR=32612&imageSR=32612&size=1280%2C1280&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195984%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "08d7ed9e8ef4deaef98d3388ec4a1673d25fb1f111c794cddfdf1db3f1c18597", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-fairyland", "url": "https://www.nps.gov/places/000/fairyland-point.htm", "title": "Fairyland Point", "publisher": "National Park Service", "date": "2024-10-10", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "Northern viewpoint, Fairyland Canyon and neighboring Boat Mesa/Campbell Canyon; differing erosional history, without numeric age or rate." } ] }, { "id": "rainbow-point", "name": "Rainbow & Yovimpa", "group": "Beyond the main bowl", "center": [ -112.2398, 37.4742 ], "width_m": 768, "surface_method": "classified-ground", "priority": 2, "source_ids": [ "nps-rainbow", "nps-yovimpa" ], "question": "How different are the two sides of a plateau rim?", "interaction": "section", "theme": "The high southern rim", "view_yaw": 1.9, "view_pitch": 0.68, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "geometry_status": "Derived from source-classified ground returns; terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2550, "center_utm": [ 390374.04880132765, 4148200.7053441294 ], "bounds_utm": [ 389990.04880132765, 4147816.7053441294, 390758.04880132765, 4148584.7053441294 ], "bounds_wgs84": [ -112.24419923581112, 37.47069391012995, -112.23540116436341, 37.477705939594316 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. Centimetre export quantization is not source accuracy." }, "statistics": { "returns_in_crop": 21492471, "density_returns_per_m2": 36.439, "ground_returns": 5237601, "retained_returns": 5237601, "vegetation_candidate_returns": 7024203, "excluded_noise_or_other": 6654, "directly_observed_node_fraction": 0.959930690924843, "interpolated_node_fraction": 0.03243163138515555, "unsupported_node_fraction": 0.007637677690001482, "isolated_high_cells_repaired": 0, "maximum_nearest_fill_m": 3.0, "cell_m": 1.5, "source_heights_m": [ 2564.89990234375, 2815.780029296875 ], "surface_heights_m": [ 2565.590087890625, 2780.360107421875 ], "intensity_display_percentiles": [ 2576.0, 23456.0 ], "vertical_surfaces": "An upper envelope can join returns across a steep face; it cannot recover undercuts, windows, or unseen interiors.", "surface_method": "classified-ground" }, "levels": [ { "file": "small.glb.gz", "bytes": 418753, "uncompressed_bytes": 1119056, "sha256": "6f8e522e48de647d0cd43c2cbf8526a6ac704897fcfaad84e411557ae0569830", "id": "small", "vertices": 16641, "triangles": 32082, "grid_nodes": 129, "spacing_m": 6.0, "degenerate_triangles": 0, "downward_triangles": 0 }, { "file": "balanced.glb.gz", "bytes": 1591020, "uncompressed_bytes": 4458704, "sha256": "e0524c0ee50074101a373920263e3c78010a105ffea3af6b2c350f6d98ff95f0", "id": "balanced", "vertices": 66049, "triangles": 129222, "grid_nodes": 257, "spacing_m": 3.0, "degenerate_triangles": 0, "downward_triangles": 0 }, { "file": "detailed.glb.gz", "bytes": 6220185, "uncompressed_bytes": 17805688, "sha256": "791fcf5f6b582bc89f72e8251bc7d1be78f474d96c4131345f136424bb2ac93a", "id": "detailed", "vertices": 263169, "triangles": 518696, "grid_nodes": 513, "spacing_m": 1.5, "degenerate_triangles": 0, "downward_triangles": 0 } ], "returns": { "file": "returns.glb.gz", "bytes": 1244372, "uncompressed_bytes": 2881232, "sha256": "43f37ca9c486344ccf8380db24e4fd4d1d5d1aec0729de671fd9e6bd939c5aae", "count": 120000, "sampling": "fixed seed 20261002, uniform without replacement from valid crop returns" }, "profiles": "profiles.json.gz", "camera": { "yaw": 1.9, "pitch": 0.68, "distance_m": 1536, "target": [ 0, 181.050048828125, 0 ] }, "bounds_local": [ [ -384.0, 15.590087890625, -384.0 ], [ 384.0, 230.360107421875, 384.0 ] ], "source_dataset": { "id": "USGS_LPC_UT_Southern_QL1_2018_LAS_2019", "acquired": "2018-04-27 / 2018-07-29 project interval", "published": "2019-06-03", "url": "https://registry.opendata.aws/usgs-lidar/", "license": "US Government Public Domain", "credit": "Map services and data available from U.S. Geological Survey, National Geospatial Program." }, "processing": { "mesh": "Source class 2 ground only. Highest retained return per nearest grid node; nearest interpolation up to 3 m; isolated spikes exceeding all 8 neighbors by 6 m lowered to neighbor maximum. No morphological closing.", "vegetation": "Source classes 3/4/5 plus low-intensity multiple echoes and low-intensity raised returns over nearby gentle classified ground are excluded. This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 1280, "height": 1280, "bytes": 579110, "sha256": "eb8a5bd9f441685c80e8425ab8e17e31d5ea9d4892ab1fc82d0f099634d131f7", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 107590, "sha256": "7e8794c8017359fd5a04493d628db7be844fc27c1cf0c7299ee4364c7b804f52", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "Two overlooks face different directions from the same high southern rim.", "body": "NPS identifies Rainbow and Yovimpa as the park’s highest viewpoints. Rainbow looks north along the plateau edge; Yovimpa looks south toward the Grand Staircase. This paired exhibit studies only their nearby topography, keeping the shared ridge and its opposite slopes at one scale.", "lesson": "Compare Overview with Other side, then move the topographic section. The remote cliffs of the Grand Staircase are outside this crop; the local model cannot establish the full regional sequence.", "limit": "This exhibit uses only the survey’s ground class to avoid modeling the forest as rock. That class can omit standing formations; undercut cliffs and distant Grand Staircase steps are not reconstructed. Compare the full return sample to see what was excluded.", "caption": "The high southern rim around Rainbow and Yovimpa Points, presented as one shared landscape study." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:45:22.135068+00:00", "source_pixels_m": 0.6, "export_pixels": 1280, "export_pixel_m": 0.6, "crs": "EPSG:32612", "requested_bounds": [ 389990.04880132765, 4147816.7053441294, 390758.04880132765, 4148584.7053441294 ], "export_extent": { "xmin": 389990.04880132765, "ymin": 4147816.7053441294, "xmax": 390758.04880132765, "ymax": 4148584.7053441294, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195919, "Name": "m_3711239_nw_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711239NW060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A389990.04880132765%2C%22ymin%22%3A4147816.7053441294%2C%22xmax%22%3A390758.04880132765%2C%22ymax%22%3A4148584.7053441294%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=389990.04880132765%2C4147816.7053441294%2C390758.04880132765%2C4148584.7053441294&bboxSR=32612&imageSR=32612&size=1280%2C1280&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195919%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=389990.04880132765%2C4147816.7053441294%2C390758.04880132765%2C4148584.7053441294&bboxSR=32612&imageSR=32612&size=1280%2C1280&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195919%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "f50f312764d559f12ba55b1d367d64d841bb52dd5a29bf2024b478f188ba35ef", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-rainbow", "url": "https://www.nps.gov/places/000/rainbow-point.htm", "title": "Rainbow Point", "publisher": "National Park Service", "date": "2026-08-15", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "One of the highest viewpoints, northward view, undercut southern plateau cliffs; local crop does not show the entire distant view." }, { "id": "nps-yovimpa", "url": "https://www.nps.gov/places/000/yovimpa-point.htm", "title": "Yovimpa Point", "publisher": "National Park Service", "date": "2024-10-10", "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "High southern overlook facing the Grand Staircase; paired exhibit studies its local ridge only." } ] }, { "id": "agua-canyon", "name": "Agua Canyon sector", "group": "Beyond the main bowl", "center": [ -112.2631, 37.5165 ], "width_m": 512, "priority": 2, "source_ids": [ "nps-agua" ], "question": "Can the aircraft distinguish a hoodoo from its surroundings?", "interaction": "returns", "theme": "Islands of standing rock", "view_yaw": 1.0, "view_pitch": 0.65, "schema": 1, "kind": "landscape-study", "checked_at": "2026-10-02", "surface_method": "upper-envelope", "geometry_status": "Derived from measured airborne returns; upper-envelope terrain study, not a closed rock scan", "coordinate_system": { "native_horizontal": "NAD83(2011) / UTM 12N (EPSG:6341)", "ept_horizontal": "WGS84 Pseudo-Mercator (EPSG:3857)", "export_horizontal": "WGS84 / UTM 12N (EPSG:32612)", "vertical": "NAVD88, Geoid12B; source heights retained", "units": "metres", "axes": "x east, y up from base_m, z south", "base_m": 2450, "center_utm": [ 388376.710147284, 4152921.257143788 ], "bounds_utm": [ 388120.710147284, 4152665.257143788, 388632.710147284, 4153177.257143788 ], "bounds_wgs84": [ -112.26603516229656, 37.514162060199126, -112.26016501592458, 37.51883787300164 ], "vertical_exaggeration": 1, "transform_note": "EPT projection transformed with pyproj; no claim of survey-grade datum alignment. Centimetre export quantization is not source accuracy." }, "statistics": { "returns_in_crop": 8243121, "density_returns_per_m2": 31.445, "ground_returns": 1763186, "retained_returns": 5532835, "vegetation_candidate_returns": 2710286, "excluded_noise_or_other": 7078, "directly_observed_node_fraction": 0.9941406472646854, "interpolated_node_fraction": 0.00585935273531457, "unsupported_node_fraction": 0.0, "isolated_high_cells_repaired": 144, "maximum_nearest_fill_m": 3.0, "cell_m": 1.0, "source_heights_m": [ 2468.679931640625, 2735.02001953125 ], "surface_heights_m": [ 2468.75, 2732.320068359375 ], "intensity_display_percentiles": [ 3520.0, 12800.0 ], "vertical_surfaces": "An upper envelope can join returns across a steep face; it cannot recover undercuts, windows, or unseen interiors.", "surface_method": "upper-envelope" }, "levels": [ { "file": "small.glb.gz", "bytes": 436411, "uncompressed_bytes": 1127284, "sha256": "b3193d2b81822732a2bc7a4b87a096e5b8273648d02b52fcc96c423cf06a20c7", "id": "small", "vertices": 16641, "triangles": 32768, "grid_nodes": 129, "spacing_m": 4.0, "degenerate_triangles": 0, "downward_triangles": 0 }, { "file": "balanced.glb.gz", "bytes": 1675730, "uncompressed_bytes": 4480892, "sha256": "9ab178b7b666c59b3083978154877081882806321306aeccba2bdbd0011f5e78", "id": "balanced", "vertices": 66049, "triangles": 131072, "grid_nodes": 257, "spacing_m": 2.0, "degenerate_triangles": 0, "downward_triangles": 0 }, { "file": "detailed.glb.gz", "bytes": 6575350, "uncompressed_bytes": 17872784, "sha256": "cf8aa0064447dfb744f4bd0da43b4357ec6b0ec5e350f0b13c042b8d4a656ae2", "id": "detailed", "vertices": 263169, "triangles": 524288, "grid_nodes": 513, "spacing_m": 1.0, "degenerate_triangles": 0, "downward_triangles": 0 } ], "returns": { "file": "returns.glb.gz", "bytes": 1242801, "uncompressed_bytes": 2881236, "sha256": "681dc02b8a3bf5cbbda15e93ec56d91e113ec5f5e492f391d94d5c76dd16873a", "count": 120000, "sampling": "fixed seed 20261002, uniform without replacement from valid crop returns" }, "profiles": "profiles.json.gz", "camera": { "yaw": 1.0, "pitch": 0.65, "distance_m": 1024, "target": [ 0, 183.25, 0 ] }, "bounds_local": [ [ -256.0, 18.75, -256.0 ], [ 256.0, 282.320068359375, 256.0 ] ], "source_dataset": { "id": "USGS_LPC_UT_Southern_QL1_2018_LAS_2019", "acquired": "2018-04-27 / 2018-07-29 project interval", "published": "2019-06-03", "url": "https://registry.opendata.aws/usgs-lidar/", "license": "US Government Public Domain", "credit": "Map services and data available from U.S. Geological Survey, National Geospatial Program." }, "processing": { "mesh": "Vegetation heuristic applied to an upper envelope. Highest retained return per nearest grid node; nearest interpolation up to 3 m; isolated spikes exceeding all 8 neighbors by 6 m lowered to neighbor maximum. No morphological closing.", "vegetation": "Source classes 3/4/5 plus low-intensity multiple echoes and low-intensity raised returns over nearby gentle classified ground are excluded. This is an imperfect heuristic, not a species/rock classifier.", "lighting": "Normals and static 12-direction terrain occlusion are derived; material color, studio lighting and display category colors are illustrative.", "detail": "Three nested node grids; no-data cells omitted at every LOD; low LOD can omit extra edge triangles to preserve holes." }, "limitations": [ "Hidden rock surfaces, undercuts and windows are not reconstructed.", "A vertical face is an interpolated connection between top-surface samples, not a wall scan.", "Vegetation filtering can leave crowns or remove dark rock; inspect the return view.", "NAIP is overhead imagery from a different year; it cannot supply photographic detail on vertical faces.", "The cut boundary is an editorial crop; there is no modeled geology beneath it.", "No route, current condition, erosion rate or collapse forecast is inferred." ], "posters": { "large": "poster.webp", "small": "poster-small.webp" }, "quality_status": "accepted_educational_landscape", "quality_record": "quality.json", "textures": [ { "file": "aerial.webp", "width": 854, "height": 854, "bytes": 255296, "sha256": "c45ffeae5b85e7a171cfe6eea3c7930d0fb3ff7df3124777e88fea4a0e76f983", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" }, { "file": "aerial-small.webp", "width": 512, "height": 512, "bytes": 94444, "sha256": "0231f570671bf249f8908423e86fd02c326c82b2021da167b4b635a50bc8a7df", "source": "imagery.json", "license": "US Government Public Domain, USDA NAIP" } ], "editorial": { "lede": "Standing formations interrupt the steep edge of the southern plateau.", "body": "NPS identifies Agua Canyon as a viewpoint with prominent hoodoos known as the Hunter and Rabbit. This crop studies the surrounding terrain and the separation of standing rock from slopes. The individual named formations require closer surface evidence before a complete sculptural reconstruction can be accepted.", "lesson": "Compare the upper surface with measured returns and with the overhead image. Bright single returns often help retain exposed rock, while multi-echo, dim returns often flag vegetation. These patterns overlap, so the classification remains a heuristic.", "limit": "The sector is complete as a terrain study only. It does not certify a complete mesh of either named hoodoo or resolve their hidden faces.", "caption": "The Agua Canyon landscape sector, a derived terrain study with standing rock and wooded slopes." }, "imagery": { "publisher": "USDA Farm Service Agency / FPAC", "dataset": "National Agriculture Imagery Program (NAIP), Utah 2024", "retrieved_at": "2026-10-02T05:45:26.581121+00:00", "source_pixels_m": 0.6, "export_pixels": 854, "export_pixel_m": 0.5995316159250585, "crs": "EPSG:32612", "requested_bounds": [ 388120.710147284, 4152665.257143788, 388632.710147284, 4153177.257143788 ], "export_extent": { "xmin": 388120.710147284, "ymin": 4152665.257143788, "xmax": 388632.710147284, "ymax": 4153177.257143788, "spatialReference": { "wkid": 32612, "latestWkid": 32612 } }, "flight_dates": [ "2024-07-23" ], "images": [ { "OBJECTID": 195956, "Name": "m_3711230_se_12_060_20240723", "Category": 1, "year_ts": 2024, "ST": "UT", "QQNAME": "3711230SE060", "QQDATE": 1721692800000, "iDate_ts": 1749744257170 } ], "catalog_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/query?f=json&geometry=%7B%22xmin%22%3A388120.710147284%2C%22ymin%22%3A4152665.257143788%2C%22xmax%22%3A388632.710147284%2C%22ymax%22%3A4153177.257143788%2C%22spatialReference%22%3A%7B%22wkid%22%3A32612%7D%7D&geometryType=esriGeometryEnvelope&inSR=32612&spatialRel=esriSpatialRelIntersects&outFields=%2A&returnGeometry=false&where=Category%3D1+AND+year_ts%3D2024", "export_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=json&bbox=388120.710147284%2C4152665.257143788%2C388632.710147284%2C4153177.257143788&bboxSR=32612&imageSR=32612&size=854%2C854&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195956%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "direct_image_url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer/exportImage?f=image&bbox=388120.710147284%2C4152665.257143788%2C388632.710147284%2C4153177.257143788&bboxSR=32612&imageSR=32612&size=854%2C854&format=png&pixelType=U8&interpolation=RSP_BilinearInterpolation&adjustAspectRatio=false&bandIds=0%2C1%2C2&mosaicRule=%7B%22mosaicMethod%22%3A%22esriMosaicLockRaster%22%2C%22lockRasterIds%22%3A%5B195956%5D%2C%22mosaicOperation%22%3A%22MT_FIRST%22%7D", "original_sha256": "7feb385c92dcf2e2935f2cfca1ffbc86601767bf8ac056add56f4cbdb8997f1a", "license": "US Government Public Domain", "license_url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery", "processing": "Locked 2024 primary rasters, RGB bands 0/1/2, orthographic drape; bilinear export, WebP encoding. No invented detail.", "limitations": "Leaf-on aerial imagery draped on 2018 filtered topography; acquisition shadows, tree crowns, temporal differences and metre-scale registration error remain. Cliff faces stretch a top-down pixel; hidden walls are not photographed." }, "sources": [ { "id": "nps-agua", "url": "https://www.nps.gov/places/000/agua-canyon.htm", "title": "Agua Canyon", "publisher": "National Park Service", "date": null, "retrieved_at": "2026-10-02", "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied", "supports": "Agua Canyon identity and prominent Hunter/Rabbit hoodoos; individual hidden surfaces remain unresolved." } ] } ], "source_ledger": "sources.json", "checked_at": "2026-10-02" }