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Informational data; no guarantee of local accuracy, completeness, access or current conditions." } }, { "id": "mn-mossy-cave", "title": "Mossy Cave section", "subtitle": "An ascending source section", "prompt": "Compare raw ascent with the change between endpoints.", "evidenceClass": "derived", "samples": [ { "d": 0, "z": 2080.293 }, { "d": 23.988, "z": 2081.452 }, { "d": 47.977, "z": 2084.033 }, { "d": 71.965, "z": 2086.694 }, { "d": 95.954, "z": 2088.125 }, { "d": 119.942, "z": 2088.747 }, { "d": 143.931, "z": 2087.693 }, { "d": 167.919, "z": 2087.679 }, { "d": 191.908, "z": 2087.726 }, { "d": 215.896, "z": 2087.698 }, { "d": 239.885, "z": 2086.885 }, { "d": 263.873, "z": 2088.542 }, { "d": 287.862, "z": 2091.188 }, { "d": 311.85, "z": 2092.262 }, { "d": 335.839, "z": 2093.45 }, { "d": 359.827, "z": 2093.515 }, { "d": 383.816, "z": 2094.624 }, { "d": 407.804, "z": 2096.009 }, { "d": 431.793, "z": 2094.074 }, { "d": 455.781, "z": 2097.546 }, { "d": 479.77, "z": 2103.47 }, { "d": 503.758, "z": 2116.524 } ], "provenance": { "sourceId": "utah-trails", "sourceIds": [ "utah-trails", "usgs-dem" ], "sourcePath": "website/public/data/trail-journeys/mossy-cave.json", "sourceSha256": "9173fd9b2970246c298db9ffb861a91cd196588f15a15f6072e668ca157d56d9", "sourceSampleIndices": [ 0, 21 ], "originalRouteWindowM": [ 0, 503.758 ], "retainedSpacingM": 23.988, "retainedSpacingRangeM": [ 23.988, 23.989000000000033 ], "sampleCount": 22, "elevationExportGridM": [ 10, 10 ], "sourceResolution": "Multi-resolution 3DEP service; native product resolution at this section is not isolated.", "distanceMethod": "Great-circle distance on each original source segment; mean Earth radius 6371008.8 m. 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Informational data; no guarantee of local accuracy, completeness, access or current conditions." } }, { "id": "mn-peekaboo-loop", "title": "Peekaboo section", "subtitle": "Undulations along a mapped line", "prompt": "Which small rises remain at a 100 m sampling interval?", "evidenceClass": "derived", "samples": [ { "d": 0, "z": 2371.711 }, { "d": 24.97, "z": 2363.538 }, { "d": 49.94, "z": 2359.068 }, { "d": 74.91, "z": 2357.029 }, { "d": 99.881, "z": 2353.544 }, { "d": 124.851, "z": 2351.409 }, { "d": 149.821, "z": 2351.377 }, { "d": 174.791, "z": 2350.41 }, { "d": 199.761, "z": 2345.684 }, { "d": 224.732, "z": 2339.744 }, { "d": 249.702, "z": 2334.87 }, { "d": 274.672, "z": 2335.644 }, { "d": 299.642, "z": 2328.918 }, { "d": 324.613, "z": 2325.678 }, { "d": 349.583, "z": 2327.927 }, { "d": 374.553, "z": 2331.979 }, { "d": 399.523, "z": 2327.87 }, { "d": 424.494, "z": 2331.646 }, { "d": 449.464, "z": 2335.448 }, { "d": 474.434, "z": 2339.737 }, { "d": 499.404, "z": 2343.33 }, { "d": 524.375, "z": 2349.026 }, { "d": 549.345, "z": 2350.06 }, { "d": 574.315, "z": 2351.362 }, { "d": 599.285, "z": 2354.743 }, { "d": 624.256, "z": 2359.191 }, { "d": 649.226, "z": 2363.144 }, { "d": 674.196, "z": 2365.785 }, { "d": 699.166, "z": 2365.004 }, { "d": 724.136, "z": 2359.377 }, { "d": 749.107, "z": 2358.527 }, { "d": 774.077, "z": 2358.074 }, { "d": 799.047, "z": 2354.218 }, { "d": 824.017, "z": 2346.006 }, { "d": 848.988, "z": 2338.83 }, { "d": 873.958, "z": 2333.604 }, { "d": 898.928, "z": 2327.53 }, { "d": 923.898, "z": 2329.855 }, { "d": 948.869, "z": 2336.306 }, { "d": 973.839, "z": 2342.111 }, { "d": 998.809, "z": 2347.32 }, { "d": 1023.779, "z": 2362.072 }, { "d": 1048.75, "z": 2374.903 }, { "d": 1073.72, "z": 2368.475 }, { "d": 1098.69, "z": 2362.395 }, { "d": 1123.66, "z": 2355.596 }, { "d": 1148.631, "z": 2354.358 }, { "d": 1173.601, "z": 2347.647 }, { "d": 1198.571, "z": 2343.564 }, { "d": 1223.541, "z": 2340.843 }, { "d": 1248.511, "z": 2340.429 }, { "d": 1273.482, "z": 2344.148 }, { "d": 1298.452, "z": 2348.946 }, { "d": 1323.422, "z": 2357.485 }, { "d": 1348.392, "z": 2358.426 }, { "d": 1373.363, "z": 2359.026 }, { "d": 1398.333, "z": 2362.864 }, { "d": 1423.303, "z": 2365.289 }, { "d": 1448.273, "z": 2365.09 }, { "d": 1473.244, "z": 2363.821 }, { "d": 1498.214, "z": 2360.424 }, { "d": 1523.184, "z": 2360.95 }, { "d": 1548.154, "z": 2366.121 }, { "d": 1573.125, "z": 2369.698 } ], "provenance": { "sourceId": "utah-trails", "sourceIds": [ "utah-trails", "usgs-dem" ], "sourcePath": "website/public/data/trail-journeys/peekaboo-loop.json", "sourceSha256": "21b3e289669fccf9deed7ff81a5c7b62fb8c74455d4030162b7c98470d994c4b", "sourceSampleIndices": [ 57, 120 ], "originalRouteWindowM": [ 1423.304, 2996.429 ], "retainedSpacingM": 24.97, "retainedSpacingRangeM": [ 24.9699999999998, 24.971000000000004 ], "sampleCount": 64, "elevationExportGridM": [ 10, 10 ], "sourceResolution": "Multi-resolution 3DEP service; native product resolution at this section is not isolated.", "distanceMethod": "Great-circle distance on each original source segment; mean Earth radius 6371008.8 m. Not Web Mercator length; not slope distance.", "elevationMethod": "Inherited rawElevation values: bilinear sampling of the retained 10 m USGS export. No inherited smoothing reused.", "elevationDatum": "NAVD88 metres under the CONUS 3DEP convention; no independent local datum verification.", "exportCRS": "EPSG:26912", "demSha256": "7e4e8adc9527bf305c08aa5a49f380d9a20b73e3471d417c266f208fdc0062b5", "demRetrievedAt": "2026-10-02T09:30:52.565527+00:00", "sourceUrls": [ "https://gis.utah.gov/products/sgid/recreation/trails-pathways/", "https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer" ], "sourceDates": [ "Item modified 2026-10-01; description says 2026-08-05; product page says 2026-07-15", "Service includes data published through 2026-08-24" ], "localVerticalAccuracyM": null, "horizontalAccuracyM": null, "transform": "Source-sample-aligned crop; distance rebased to zero; raw elevation unchanged; geographic coordinates omitted." }, "attribution": { "short": "UGRC, WFRC (CC BY 4.0); USGS 3DEP (public domain); derived by BCC.", "license": "https://creativecommons.org/licenses/by/4.0/", "changes": "BCC selected, assembled and clipped mapped lines upstream; this notebook crops and resamples their derived elevation profiles.", "disclaimer": "No agency endorsement. Informational data; no guarantee of local accuracy, completeness, access or current conditions." } } ], "sources": { "utah-trails": { "title": "Utah Trails and Pathways", "publisher": "Utah Geospatial Resource Center (UGRC), WFRC", "url": "https://gis.utah.gov/products/sgid/recreation/trails-pathways/", "item": "3080c0a2859a4d23a279e17e17c703c8", "rights": "CC BY 4.0", "license": "https://creativecommons.org/licenses/by/4.0/", "evidence": "utah-trails-item.json", "updated": "Item modified 2026-10-01; description says 2026-08-05; product page says 2026-07-15", "limits": "State compilation including licensed Orbital View data and NPS revisions. Selected records still identify OrbitalView as their source. No source survey date, intended engineering scale or positional accuracy is supplied for these segments. General overview only.", "evidence_sha256": "92b5bfc5b0c34cd05a4afd3507acd4515716228dd8fe936ffd907d431fbbd576", "retrieved_at": "2026-10-02T08:43:23.984065+00:00" }, "nps-trails": { "title": "NPS public trail centerlines", "publisher": "National Park Service", "url": "https://mapservices.nps.gov/arcgis/rest/services/NationalDatasets/NPS_Public_Trails/FeatureServer/0", "rights": "U.S. federal public data; retain NPS disclaimer", "evidence": "nps-trails-layer.json", "updated": "Selected BRCA records edited 2021; acquisition dates often unknown", "limits": "Partial network in the retrieved BRCA extract. Three social/non-public-note records excluded. Source accuracy is Unknown; publication in this service does not establish current opening.", "evidence_sha256": "a298432c8c519d1c38cd8aa41df705b9f08d8024119cbf21ba27b247ed87bd8d", "retrieved_at": "2026-10-02T08:39:43.452923+00:00" }, "usgs-dem": { "title": "USGS 3DEP Bare Earth DEM Dynamic service", "publisher": "U.S. Geological Survey", "url": "https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer", "rights": "Public domain", "evidence": "usgs-dem-receipt.json", "updated": "Service includes data published through 2026-08-24", "limits": "10 m bilinear export, NAD83 / UTM 12N; NAVD88 metres under the CONUS 3DEP convention. Mixed source resolutions and dates. Not surveyed trail tread. Profile and ascent errors can be large beside cliffs, bridges or tunnels.", "evidence_sha256": "f65dc0388e00850e9d0f1ae7122ad5cad0ab42374e284c17b3604c5393f26da5", "retrieved_at": "2026-10-02" }, "usgs-datum": { "title": "USGS DEM datums and resolutions", "publisher": "U.S. Geological Survey", "url": "https://www.usgs.gov/faqs/what-projection-horizontal-datum-vertical-datum-and-resolution-a-usgs-digital-elevation-model", "rights": "Public-domain federal text", "evidence": "usgs-datum.html", "evidence_sha256": "940196ec02519b1bcf53877e7f633657b345e44b704c56d0602a8efbb6f1adcf", "retrieved_at": "2026-10-02T08:45:36.350991+00:00" }, "usgs-accuracy": { "title": "USGS 3DEP vertical accuracy", "publisher": "U.S. Geological Survey", "url": "https://www.usgs.gov/faqs/what-vertical-accuracy-3d-elevation-program-3dep-dems", "rights": "Public-domain federal text", "evidence": "usgs-accuracy.html", "limits": "National aggregate RMSE is not a local route-error bound. No local accuracy claim is made.", "evidence_sha256": "8666f57d4bb05e53ed2b8971a521cd8f8c4b36de7896bc0db6fc290d655020f4", "retrieved_at": "2026-10-02T08:45:39.333802+00:00" } } }