{"slug": "usgs-3dhp", "name": "3D Hydrography Program (3DHP)", "tagline": "Lidar-based flowlines that succeed the NHD", "source": "USGS", "category": {"slug": "rivers", "name": "Rivers", "icon": "river", "tone": "blue"}, "meta": ["Lines and polygons", "Annual releases since 2025", "United States (growing)"], "thumb": "/static/catalog/thumbs/usgs-3dhp.c0c36712ab73.jpg", "bbox": [-180.0, 17.0, -64.0, 72.0], "global": false, "access": "api", "url": "/datasets/usgs-3dhp/", "subtitle": "USGS elevation-derived hydrography", "summary": "Flowlines, waterbodies and hydrologic units derived from 3DEP lidar so that streams line up with the elevation model. It replaces the NHD and Watershed Boundary Dataset as coverage grows.", "categories": [{"slug": "rivers", "name": "Rivers", "icon": "river", "tone": "blue"}, {"slug": "dem", "name": "DEM", "icon": "mountain", "tone": "slate"}], "sources": [{"slug": "usgs", "name": "U.S. Geological Survey", "label": "USGS", "url": "https://www.usgs.gov/", "page": "/sources/usgs/"}], "facts": [["Source", "USGS"], ["Resolution", "Lines from lidar elevation"], ["Time span", "Annual releases since 2025"], ["Temporal", "Annual"], ["Access type", "API (external)"], ["Formats", "File geodatabase, GeoPackage"], ["Coverage", "United States (growing)"]], "access_note": "The National Map API, no key", "coverage": "United States (growing)", "license": {"name": "Public domain (U.S. Government work)", "url": "https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits"}, "citation": "", "doi": "", "landing_url": "https://www.usgs.gov/3d-hydrography-program", "provider_url": "https://www.usgs.gov/3d-hydrography-program", "methods": [{"type": "tnm", "label": "3DHP files for the box (The National Map)"}], "preview": {"type": "layer", "layer": "rivers", "label": "Rivers (Natural Earth)"}, "thumb_credit": "Rivers (Natural Earth) over Blue Marble (NASA GIBS)", "selection": [-123.0, 43.5, -121.0, 45.5], "selection_text": "-123,43.5,-121,45.5", "snippets": {"curl": "curl -fsSL \"https://hydrological.org/api/v1/datasets/usgs-3dhp/links.txt?bbox=-123,43.5,-121,45.5\" \\\n  | xargs -n 1 curl -fLO", "python": "import requests\n\nr = requests.get(\"https://tnmaccess.nationalmap.gov/api/v1/products\",\n                 params={\"bbox\": \"-123,43.5,-121,45.5\",\n                         \"datasets\": \"3D Hydrography Program (3DHP)\"})\nfor item in r.json()[\"items\"]:\n    print(item[\"title\"], item[\"downloadURL\"])", "javascript": "const res = await fetch(\"https://hydrological.org/api/v1/datasets/usgs-3dhp/links?bbox=-123,43.5,-121,45.5\");\nconst { groups } = await res.json();\nfor (const g of groups) g.links.forEach(l => console.log(l.url));"}, "api": {"links": "/api/v1/datasets/usgs-3dhp/links?bbox=-123,43.5,-121,45.5", "manifest": "/api/v1/datasets/usgs-3dhp/manifest?bbox=-123,43.5,-121,45.5"}}