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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