Other open sources of elevation/topographic data:
- http://www.earthenv.org/DEM — EarthEnv-DEM90 (global; smoothed 90 m),
- http://www.eorc.jaxa.jp/ALOS/en/aw3d30/index.htm — ALOS AW3D30 (global height above sea level; 30 m resampled from 5 m),
- http://srtm.csi.cgiar.org — SRTM DEM tiles (near to global; 90 m),
- http://www.gdem.aster.ersdac.or.jp — GDEM tiles (global; ca 30-60 m),
- http://www.astrium-geo.com/worlddem/ — WorldDEM global at 12 m resolution and high vertical accuracy (+/-2-5 m),
- http://opentopography.org — High resolution topographic (LiDAR) data (regional/local; 1–10 m resolution),
- http://seamless.usgs.gov/website/seamless/viewer.htm – Seamless Data Warehouse (USGS),
“Elevation” and geomorphometry services:
- https://developers.google.com/maps/ — Google Maps Elevation API / R package googleway
- https://open.mapquestapi.com/elevation/ — elevation services,
- http://www.arcgis.com — ESRI Elevation layers,
- http://scalgo.com — global DEM-based hydrological services,
Datasets can also be shared via the ArcGIS On-line web-service (see “Geomorphometry” group).
