Extract elevations from DEM#

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

Inputs:

  • Input file - CSV or XLS(X) file with points coordinates in EPSG:4326. Column names must be in Latin. How to prepare CSV file in QGIS.

  • Name of the latitude column - Name of latitude column in the input file;

  • Name of the longitude column - Name of longitude column in the input file;

  • Output format - select from the list:

    • CSV

    • ESRI Shapefile

    • MapInfo TAB

    • GeoJSON

    • GeoPackage (GPKG)

    • DXF

    • FlatGeobuf

  • Elevation dataset - choose from the list:

    • Copernicus

    • ALOS - ALOS World 3D has resolution of 30 meters

    • MERITDEM

    • GEBCO - resolution is 15 sec (about 500 meters).

Outputs:

  • File in the selected format with coordinates and elevation values for the points.

How to prepare CSV file#

CSV file must have the following parameters:

  • Delimiter should be comma.

  • Corrdinates are float values.

  • File should not have spaces and should contain only latin symbols.

To save a point layer as a CSV file with coordinates in QGIS, go to Layer ‣ Save as. In the Format field select Comma separated values.

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

Fig. 139. Exporting point layer as CSV#

Launch the tool: https://toolbox.nextgis.com/t/demInPoints

Try the tool in action

  1. Click on the Demo button above the tool form. The fields are filled in with demo values.

  2. Click on the Run button.

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