{ "schema": 1, "pack_id": "gateway-landscapes", "checked_at": "2026-10-02", "sources": [ { "id": "bcc-terrain", "title": "Preserved BCC 30 km USGS-derived terrain", "publisher": "USGS 3DEP; BCC derivative", "url": "https://www.usgs.gov/3d-elevation-program", "local_inputs": [ "assets/terrain/terrain.json", "assets/terrain/mesh-1537.webp" ], "source_date": "2018 lidar collection, inherited provenance", "retrieved_at": "2026-10-02 (local baseline audit)", "supports": "Elevation surface only. Native NAD83 / UTM 12N horizontal coordinates and inherited NAVD88 heights. The preserved BCC mesh has 4 m core nodes and roughly 4–200 m outer node spacing.", "rights": "USGS-produced elevation data are public domain in the United States. Original BCC resampling and cartography. No NAIP imagery, OSM place positions, photographs or textures from the parent terrain are reused.", "evidence_class": "derived", "limits": "Parent source identity and metadata are preserved, not newly acquired or independently surveyed. This pack uses 100 m nodes with a nine-tap average. Heights cannot resolve spires, hidden faces, vegetation or buildings." }, { "id": "census-places", "title": "TIGERweb Incorporated Places, January 1, 2026 vintage", "publisher": "U.S. Census Bureau", "url": "https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/4", "retrieved_at": "2026-10-02", "source_date": "2026-01-01", "feature_ids": [ "4908787", "4977560", "4910330" ], "supports": "Official Census names and INTPTLAT/INTPTLON reference coordinates for Bryce Canyon City, Tropic and Cannonville.", "rights": "U.S. government geographic facts; credit U.S. Census Bureau. No municipal polygon, seal, photograph or commercial basemap reused.", "evidence_class": "reference", "limits": "Internal reference points are not town centers, civic addresses, parking points, boundaries or driving destinations. Source digits do not imply survey accuracy." }, { "id": "usgs-gnis", "title": "The National Map Geographic Names — Landforms", "publisher": "U.S. Geological Survey", "url": "https://carto.nationalmap.gov/arcgis/rest/services/geonames/MapServer/5", "retrieved_at": "2026-10-02", "source_date": "Service refreshed July 2026", "feature_ids": [ 1439207, 1446726, 1451152 ], "supports": "Names and feature classes: Bryce Canyon (Valley), Tropic Valley (Basin), Paunsaugunt Plateau (Plain).", "rights": "USGS-produced public-domain data; credit USGS GNIS. No cartographic artwork reused.", "evidence_class": "reference", "limits": "Multipoint name locations are not area boundaries; duplicated county records were deduplicated by retaining the Garfield record. The broad plateau label is editorially placed, without asserting a perimeter." }, { "id": "nps-pois", "title": "NPS Public Points of Interest — preserved BRCA subset", "publisher": "NPS National Geospatial Program", "url": "https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_POIs/FeatureServer/0", "retrieved_at": "2026-10-02 (preserved travel snapshot)", "feature_ids": [ 1879, 7428, 13436 ], "supports": "Visitor Center, Bryce Point overlook and Rainbow Point overlook coordinates. Original roles and coordinate methods remain attached.", "rights": "Public-domain NPS government data; no photographs, agency marks or underlying source imagery are copied.", "evidence_class": "reference", "limits": "Positional accuracy is often unknown. Locations do not describe property, parking, access or current operating conditions." }, { "id": "nps-roads", "title": "NPS Public Roads — main park road and Bryce Point access", "publisher": "NPS National Geospatial Program / FHWA", "url": "https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_Roads/FeatureServer/0", "retrieved_at": "2026-10-02 (preserved travel snapshot)", "feature_ids": [ 1229, 4896, 5778, 6056 ], "supports": "Selected main park road and Bryce Point reference alignments.", "rights": "Public-domain NPS/FHWA government data. Selected, clipped, projected and simplified to 35 m tolerance.", "evidence_class": "derived", "limits": "No connected routing, live closure status, parking or public access guarantee." }, { "id": "udot-routes", "title": "UDOT Routes ALRS — selected SR 12 and SR 63", "publisher": "UDOT GIS", "url": "https://gis.utah.gov/products/sgid/transportation/highway-routes-lrs/", "retrieved_at": "2026-10-02 (preserved travel snapshot)", "source_date": "2026-06-24, inherited source record", "feature_ids": [ "0012PM", "0063PM" ], "supports": "Regional reference road alignments only.", "rights": "UDOT informational-use dataset, with its own disclaimer in NOTICE.txt; not assigned UGRC's default CC BY license. Source was generalized by the server at 0.0002 degrees; this pack clips and simplifies in projected metres.", "evidence_class": "derived", "limits": "Not a navigable network or a source of road distances, turn restrictions, opening or accessibility." }, { "id": "ugrc-nhd", "title": "Utah Streams NHD — East Fork Sevier River and Paria River", "publisher": "UGRC SGID / USGS NHD", "url": "https://gis.utah.gov/products/sgid/water/nhd-streams/", "service_url": "https://services1.arcgis.com/99lidPhWCzftIe9K/ArcGIS/rest/services/UtahStreamsNHD/FeatureServer/0", "item_url": "https://www.arcgis.com/home/item.html?id=d9b5ac9220ff415994b193c9ce022f86", "retrieved_at": "2026-10-02", "source_date": "Dataset page last updated December 2016; individual FDate values retained", "supports": "Selected named river-line positions within the terrain excerpt. 110 source features returned; clipped subset only is published.", "rights": "UGRC SGID (data modified), under CC BY 4.0: https://creativecommons.org/licenses/by/4.0/. Credit original USGS NHD and UGRC. Complete source disclaimer is retained unmodified in NOTICE.txt.", "evidence_class": "derived", "changes": "Bounded query, 0.0002-degree service generalization, projection to EPSG:26912, clipping at terrain footprint, local simplification at 20 m tolerance, removal of unused fields, BCC symbology.", "limits": "Only two named river systems, not a complete channel network or a watershed delineation. Historical feature classification does not establish present water, flow, perennial conditions or safety." }, { "id": "nps-physiography", "title": "Biophysical Description of Bryce Canyon National Park", "publisher": "NPS Northern Colorado Plateau Inventory & Monitoring Network", "url": "https://www.nps.gov/im/ncpn/bpd-brca.htm", "retrieved_at": "2026-10-02", "source_date": "Based on the 2004 monitoring plan", "supports": "Park on the eastern Paunsaugunt rim; plateau-side runoff toward East Fork Sevier; Paria headwater context; historical diversion across the drainage divide.", "rights": "Factual educational paraphrase only. No photographs or agency artwork copied.", "evidence_class": "reference", "limits": "The page warns that some information may have changed. No current populations, threats, flow rates, legal status, or the page's legacy stratigraphic wording are adopted." }, { "id": "nps-gri", "title": "Bryce Canyon National Park Geologic Resource Evaluation Report", "publisher": "National Park Service, Geologic Resources Division; T. Thornberry-Ehrlich", "url": "https://npshistory.com/publications/brca/nrr-2005-002.pdf", "retrieved_at": "2026-10-02 (indexed text)", "source_date": "2005", "supports": "East Fork Sevier flows north along the plateau; Paria flows south as part of the Colorado River system; rim separates the primary drainage directions.", "rights": "Primary NPS-authored report served by the NPS History archive; factual paraphrase only, no maps or artwork reproduced.", "evidence_class": "reference", "limits": "Historical geologic context, not current flow measurements. Complete hydrologic boundaries and diversions are not mapped here." }, { "id": "usgs-rights", "title": "USGS Copyrights and Credits", "publisher": "U.S. Geological Survey", "url": "https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits", "retrieved_at": "2026-10-02", "supports": "USGS-authored data public-domain basis and separate third-party media exceptions.", "rights": "Policy reference only.", "evidence_class": "reference" }, { "id": "ugrc-license", "title": "UGRC Data License and Disclaimer", "publisher": "Utah Geospatial Resource Center", "url": "https://gis.utah.gov/documentation/policy/license/", "retrieved_at": "2026-10-02", "supports": "CC BY 4.0, attribution, modification notice and unmodified disclaimer for UGRC-hosted data. Item-specific license also checked.", "rights": "Reference and required license/disclaimer retention.", "evidence_class": "reference" }, { "id": "bcc-original", "title": "Original Gateway Landscapes cartography and teaching interface", "publisher": "Bryce Canyon Conservancy local candidate", "url": null, "created_at": "2026-10-02", "supports": "Original typography, layout, rendering, source-qualified explanations, section selections, palette and flow-direction arrows.", "rights": "Original BCC work; no claim to underlying government or CC BY data. Parent review controls integration and release.", "evidence_class": "illustrative", "limits": "No expert, legal, field, physical-device or production acceptance is implied." } ], "failed_sources_not_used": [ "USGS National Map NHD layer 6 queries timed out; layer 4 returned HTTP 504. No data from those failed queries are shown." ], "claims": [ { "id": "gateway-cl-plateau", "text": "The Bryce rim is the eastern edge of the Paunsaugunt Plateau.", "source_ids": [ "nps-physiography", "usgs-gnis" ], "evidence_class": "reference" }, { "id": "gateway-cl-towns", "text": "Bryce Canyon City is north of the main amphitheater; Tropic and Cannonville are east of the rim in lower country.", "source_ids": [ "census-places", "bcc-terrain", "nps-pois" ], "evidence_class": "derived", "method": "Compare published reference coordinates and the inherited elevation surface; no town-wide elevation or boundary assertion." }, { "id": "gateway-cl-water", "text": "The two principal directions are north in the East Fork Sevier system and south through the Paria system toward the Colorado River.", "source_ids": [ "nps-gri", "nps-physiography", "ugrc-nhd" ], "evidence_class": "reference" }, { "id": "gateway-cl-edge", "text": "Rainbow Point's NPS reference lies outside the southern edge of this terrain grid.", "source_ids": [ "nps-pois", "bcc-terrain" ], "evidence_class": "derived", "method": "Project the NPS coordinate to EPSG:26912; local z is 15546.608 m while the grid ends at 15000 m." } ] }