High-resolution Digital Elevation Models at 5-meter resolution from INEGI (Instituto Nacional de Estadística y Geografía), Mexico.
Not the CEM: This collection holds INEGI's Modelos Digitales de Elevación de Alta Resolución, derived from airborne lidar and high-resolution stereo-photogrammetry (the source method varies by tile). It is a distinct product from the nationwide 15 m Continuo de Elevaciones Mexicano (CEM), which is interpolated from contour lines and other sources.
Source & method: Airborne lidar and high-resolution stereo-photogrammetry (method varies by tile). The terrain model (DTM / Modelo Digital de Terreno) represents bare earth; the surface model (DSM / Modelo Digital de Superficie) includes vegetation, buildings and infrastructure.
Products: DTM (terreno) and DSM (superficie).
Resolution: 5 m ground sample distance.
Coordinate reference: ITRF2008 (GRS80) UTM zones 11N–16N per tile (EPSG:6366–6371); orthometric elevations in meters on the NAVD88 vertical datum (EPSG:5703), per INEGI's Norma Técnica del Sistema Geodésico Nacional (DOF 2010-12-23, Art. 15).
Redistribution: Republished by Darly under INEGI's Términos de Libre Uso. The source data has been re-hosted as Cloud-Optimized GeoTIFFs and may have been reprojected or reformatted from INEGI's original distribution. This is not an official INEGI product and does not represent an official position of INEGI. Source: INEGI.
Documentation:
Access
The catalog is browsable without a key. Elevation lookups need a free API key, sent as an X-API-Key header; see the quickstart.
curl "https://api.darly.io/collections/mex-inegi-lidar-5m/items?limit=5"curl -H "X-API-Key: $DARLY_API_KEY" \
"https://api.darly.io/v1/elevation/point?lat=23.57&lon=-102.56&collections=mex-inegi-lidar-5m"from pystac_client import Client
catalog = Client.open("https://api.darly.io")
search = catalog.search(collections=["mex-inegi-lidar-5m"], bbox=[-118.39, 14.5, -86.72, 32.64], max_items=5)
for item in search.items():
print(item.id, item.assets["dtm"].href if "dtm" in item.assets else item.assets["dsm"].href)Providers
- Instituto Nacional de Estadística y Geografía (INEGI) — producer, licensor, host
- Darly — processor
Citation
Fuente: INEGI, Modelos Digitales de Elevación de Alta Resolución LiDAR (5 m).