7.9.2. Projecting data into another coordinate reference system (CRS)

The coordinate system is different (ETRS89 / ETRS-LAEA, EPSG-code 3035) from that one of Switzerland, and for our purpose its best to bring it into the same coordinate reference system as the other layers (CH1903 / LV03).

  1. Switch to QGIS Desktop.
  2. Open the menu Raster.
  3. Choose Projections.
  4. Click Warp (Reproject).
  5. Select the raster image g100_06.tif as Input file.
  6. Choose a name and destination for the Output file (e.g. g100_06_ch1903.tif).
  7. The Source SRS should be automatically detected (ETRS89 / ETRS-LAEA), but the Target SRS has to be defined: click Select > filter for “CH1903 / LV03” and select the remaining CRS listed.
  8. Confirm with OK. The EPSG-codes should be set corresponding to Fig. 109.
  9. Choose the Resampling method Near because we have categorized data and want to keep the original integer values (see section 7.5.3.).
  10. Activate the checkbox Load into canvas when finished.
  11. Click OK. The projection process of large raster datasets can take several minutes depending on the computer processing power, so please be patient.


Fig. 109. Reprojecting the Corine Land Cover 2006 raster dataset for Europe into the coordinate reference system of Switzerland.

figure109

 

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