1

I have to two polygon layers, the red layer is the the bottom layer.

enter image description here

The second layer covers most of the bottom layer

enter image description here

I would like to know if there is a tool that will create a polygon layer of just the red parts showing in the second photo.

The parts of image one that are visible in image two?

  • Can you give details?What values do you have to your second image for each color?? – geo_dd Mar 9 '15 at 9:20
  • pink = road, blue = path – Data_101 Mar 9 '15 at 9:30
  • Don't you have values(eg road=10)? Perhaps if your files are rasters you can use raster calculator. With an expression you can choose only the red.(eg blue=1, red=2,pink=3. to raster calculator the x_output would be something like: "file_2==2".) If is that all you want to do. – geo_dd Mar 9 '15 at 9:37
  • they are both polygon layers – Data_101 Mar 9 '15 at 9:40
10

If you have an Advanced license, you can use Erase. If you don't, Union is an option: run the tool then delete resulting features with attributes from both inputs and with attributes from the second layer only.

1

If you're using QGIS you can use the toll Difference that will give you the difference between the two shapes.

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