1.2. Projecting the Maps: From Lat/Lon to Metres

In order to perform spatial analysis (intersection & unions) on the maps, we need to project it from Lat/Lon into metres. Refer to Understanding CRS, GCS and PCS for explanation of Coordinate Reference System (CRS) and projections.

  1. Reproject both the site and Land_Use layer (Reprojecting Files). The Land_Use layer will take longer as the layer has much more information.



    ../../_images/img14.png



  2. Delete the rest of the unprojected layer so that we do not get confused by so many layers. Right click on the layer, Layer -> Remove Layer …



    ../../_images/img23.png



  3. Lastly, since all our layers are using the same projections. Let’s set the project CRS to that layer. Right click on the layer. Layer -> Set CRS -> Set Project CRS from Layer.



    ../../_images/img32.png



  4. We can see that at the bottom right. The CRS has been changed to the layer CRS.



    ../../_images/img42.png