{"slug": "nasadem", "name": "NASADEM", "tagline": "Reprocessed SRTM with ASTER and ICESat corrections", "source": "NASA JPL", "category": {"slug": "dem", "name": "DEM", "icon": "mountain", "tone": "slate"}, "meta": ["30 m", "2000", "Global"], "thumb": "/static/catalog/thumbs/nasadem.014729695a0a.jpg", "bbox": [-180.0, -56.0, 180.0, 60.0], "global": true, "access": "login", "url": "/datasets/nasadem/", "subtitle": "NASADEM Merged DEM Global 1 arc second", "summary": "A reprocessing of the original SRTM radar data with improved phase unwrapping and ICESat control, with voids filled mainly from ASTER GDEM. It supersedes SRTMGL1 for most uses inside the SRTM footprint.", "categories": [{"slug": "dem", "name": "DEM", "icon": "mountain", "tone": "slate"}], "sources": [{"slug": "nasa", "name": "National Aeronautics and Space Administration", "label": "NASA", "url": "https://www.earthdata.nasa.gov/", "page": "/sources/nasa/"}], "facts": [["Source", "NASA JPL"], ["Resolution", "30 m (1 arc-second)"], ["Time span", "2000"], ["Temporal", "Static"], ["Access type", "Download with free login"], ["Formats", "HGT (zipped), NetCDF"], ["Coverage", "56°S – 60°N"]], "access_note": "Free NASA Earthdata login", "coverage": "56°S – 60°N", "license": {"name": "Public domain (U.S. Government work)", "url": "https://lpdaac.usgs.gov/data/data-citation-and-policies/"}, "citation": "NASA JPL (2020). NASADEM Merged DEM Global 1 arc second V001. NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/MEaSUREs/NASADEM/NASADEM_HGT.001", "doi": "10.5067/MEaSUREs/NASADEM/NASADEM_HGT.001", "landing_url": "https://lpdaac.usgs.gov/products/nasadem_hgtv001/", "provider_url": "https://search.earthdata.nasa.gov/search?q=NASADEM_HGT", "methods": [{"type": "cmr", "label": "NASADEM_HGT v001 tiles from NASA Earthdata"}, {"type": "api", "label": "Clipped GeoTIFF from the OpenTopography Global DEM API (free API key)"}], "preview": {"type": "relief"}, "thumb_credit": "Relief rendered from AWS Terrain Tiles", "selection": [-75.0, -20.0, -50.0, 5.0], "selection_text": "-75,-20,-50,5", "snippets": {"curl": "# Earthdata login in ~/.netrc:\n# machine urs.earthdata.nasa.gov login USER password PASS\ncurl -fsSL \"https://hydrological.org/api/v1/datasets/nasadem/links.txt?bbox=-75,-20,-50,5\" \\\n  | xargs -n 1 curl -fLO --netrc -b ~/.urs_cookies -c ~/.urs_cookies", "python": "import earthaccess  # pip install earthaccess\n\nearthaccess.login()\nresults = earthaccess.search_data(short_name=\"NASADEM_HGT\", version=\"001\",\n                                  bounding_box=(-75, -20, -50, 5))\nearthaccess.download(results, \"data\")", "javascript": "const res = await fetch(\"https://hydrological.org/api/v1/datasets/nasadem/links?bbox=-75,-20,-50,5\");\nconst { groups } = await res.json();\nfor (const g of groups) g.links.forEach(l => console.log(l.url));"}, "api": {"links": "/api/v1/datasets/nasadem/links?bbox=-75,-20,-50,5", "manifest": "/api/v1/datasets/nasadem/manifest?bbox=-75,-20,-50,5"}}