University of Alaska Fairbanks • Scenarios Network for Alaska + Arctic Planning

Alaska + Arctic Geospatial Data API

Built by the Scenarios Network for Alaska + Arctic Planning

Elevation Polygon Aggregation

Query zonal statistics for 1 km interpolations of the 30 m resolution ASTER GDEM data for a specific polygon.

A query will fetch the minimum, mean, and maximum elevations found within a single polygon.

Example: /elevation/area/19010208


Results from the above HUC-8 query will look like this:

{
  "res": "1 kilometer",
  "title": "ASTER Global Digital Elevation Model",
  "units": "meters difference from sea level",
  "max": 2961.0,
  "mean": 822.0,
  "min": 0.0
}
  • title: (str), Title describing these results.
  • res: (str), Spatial resolution (pixel size) of the DEM.
  • units: (str), Units for elevation values.
  • max: (float), Zonal Maximum Elevation value derived from `max` DEM interpolation.
  • mean: (float), Zonal Mean Elevation value derived from `average` DEM interpolation.
  • min: (float), Zonal Minimum Elevation value derived from `min` DEM interpolation.

Source data

Data Layer Download Link Data Notes
The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) Download Tiles 0 indicates sea level. Negative values are expected and indicate depressions below sea level.