2.2.10. Extract elevations from DEM

The extraction of elevations from DEM. Returns CSV with coordinates and altitude.

Inputs:

  • ZIP-compressed CSV - CSV table with coordinates of points. Delimiter should be comma. Corrdinates are floating values. File should not have spaces and should contain only latin symbols.

  • Latitude - fieldname for Latitude column. Case-sensitive.

  • Longitude - fieldname for Lonitude column. Case-sensitive.

  • Elevation dataset - enter one of the following: gmted, gebco, alos. GMTED2010 resolution is 7.5 sec (about 250 meters), GEBCO resolution is 15 sec (about 500 meters), ALOS World 3D - 30 meters.

Outputs:

  • ZIP-compressed CSV-file with coordinates and elevation values for the points.

To save a point layer as a CSV file with coordinates, during export in the Layer options section select for the GEOMETRY field the option AS_XY. The resulting file will have longitude in the X column and latitude in Y column.

../../_images/save_as_cvs_coord_en.png

Pic. 2.9. Exporting point layer as CSV

Launch tool: https://toolbox.nextgis.com/operation/demInPoints

Try it out using our sample:

Download input dataset to test the instrument. Step-by-step instructions included.

Get the output to additionally check the results.