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QGIS: loading elevation layers. Franck Theeten, Royal Museum for central Africa Cabin training 2013. Data format. Elevation data are usually raster data available in 2 formats GRID GeoTIFF ( TIff images file associated to a metadata file giving the position of the image) .

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Qgis loading elevation layers

QGIS: loadingelevationlayers

Franck Theeten,

Royal Museum for central Africa

Cabin training 2013


Data format
Data format

  • Elevation data are usually raster data available in 2 formats

    • GRID

    • GeoTIFF (TIff images file associated to a metadata file giving the position of the image)


Accessing files
Accessing files

  • Free elevation data are availablefrom the STRM (Shuttle Radar Topography Mission) project of the American USGS

  • 90M data GeoTIFFcanbedownloaded on the website of CGIAR :

    • http://www.cgiar-csi.org/data/srtm-90m-digital-elevation-database-v4-1


Importing the dem
Importing the DEM

  • Import the (unzipped) DEM GeoTIFF as raster layer (select the tif file):


Importing the dem1
Importing the DEM

  • You shouldsee a grey zone thatstillrequires the application fo a colorscheme


Color scheme
Colorscheme

  • Right click the properties of the layer


Color scheme1
ColorScheme

  • Create 20 Classification zones and click classify:


Color scheme2
Colorscheme

  • Bu double-clicking on the threecolumns, change the value, color and label to the following values (for the exercise)


Color scheme3
Colorscheme

  • Resulting image:


Get information
Get information

  • To get the information about a specific point, select the active layer in the left menu and click on the button

    • (alsowork for shapefile)


Get information1
Get information

Altitude value in meters


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