5

I am trying to cut this raster in order to drop the outside of the walls white area and the area with the dots. I made one step using as mask the green polygon but i couldn't remove the inside of the walls area with the dots. Any idea? andros

  • Have you tried running a second clipping with a polygon of the inside? – AndreJ Jan 24 '14 at 9:51
  • Yes, it keeps only the inside the polygon area. I want to keep only the walls. – Παύλος Αποστόλου Jan 24 '14 at 10:40
4

It works this way:

  1. Create a clip polygon for the outer border

  2. Create a clip poygon for the inner border

  3. Create a multipolygon with the second layer as a hole using Vector -> Geoprocessing -> Difference

  4. Clip the Raster to that multipolygon using Raster -> Extraction -> Clipper

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.