Excluding boundaries using ArcMap?

I have round plots that include forest areas inside them (the picture is an example of one plot). I calculated the total perimeter of forest areas inside the plot. The problem is I want to exclude the plot boundaries that overlap with the forest.

Any ideas?

enter image description here

Geographic Information Systems Asked on November 21, 2021

2 Answers

2 Answers

You could convert your forest to vector (if it is currently raster data) and run the Erase geoprocessing tool, using your plots as the input and the forest as the erase coverage. Then, just recalculate the geometry of you plots on the output to get the area. One caveat though... this tool requires an Advanced license.

Answered by cl3 on November 21, 2021

  1. convert the raster to polygons
  2. union the polygon with the plot
  3. select the polygon that are not forest (select by attribute)
  4. delete the selected polygons (in an edit session)
  5. use "polygon to line"
  6. select all lines with either left of right FID = -1 (those are the forest/non forest boundaries)

Answered by radouxju on November 21, 2021

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