3

I have the following situation: two layers that I want to intersect. The first layer has polygons over agricultural areas (blue polygons). The second one is the Study area (green polygon). I want to use the "Study area" layer to complete the blank spaces of the first one:

I am trying with intersect but it is not working.

enter image description here

enter image description here

enter image description here

Edit to reply the answer

I have tried your option but I don't have the expected results. Both layers have the same projectionenter image description here

enter image description here

Second edit:

enter image description here

Improve this question
4
  • 1
    Check the geometry of the field polygon layers. You may have invalid geometries. You can do that using 'Vector -> Geometry tool -> Check Geometries'
    – ahmadhanb
    Aug 9, 2017 at 13:47
  • It seems I have both invalid and error output. What can I do to solve this?
    – GCGM
    Aug 9, 2017 at 13:53
  • 1
    That is another question, and it is difficult to answer it here without knowing what type of invalid geometry do you have. I think it is better to ask another question describing the type of invalid geometry: overlapping polygons, self-intersection, etc. Make it clear to attract more answers. For this question, the solution is using union with valid geometry.
    – ahmadhanb
    Aug 9, 2017 at 13:59
  • Please edit the title of your question to include enough information for future visitors to be able to find this thread when looking for the same problem.
    – underdark ♦
    Feb 9, 2018 at 18:52

2 Answers 2

Reset to default
3

You need to use Union tool from Vector -> Geoprocessing tools -> Union.

enter image description here

Make sure that both layers should have the same projection to work properly. Otherwise, you may have undesirable results.

Improve this answer
1
  • Hi, thanks for the reply. I just edit the question to show my problem. I am doing the same as you but the output is not correct
    – GCGM
    Aug 9, 2017 at 13:41
1

To solve this issue you may use "Union"

Vector > Geoprocessing Tools > Union.

This Link describe better - http://grindgis.com/software/qgis/basic-editing-tools-in-qgis

enter image description here

enter image description here

enter image description here enter image description here

Improve this answer
1
  • Hi, thanks for the reply. I just edit the question to show my problem. I am doing the same as you but the output is not correct
    – GCGM
    Aug 9, 2017 at 13:41

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

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