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Subtracting one polygon from another in MapInfo 15

Geographic Information Systems Asked by Tumyppp on December 7, 2020

I want to make a hole in a polygon.

In older versions of MapInfo I did it with ease, but how do I do it in the current version which is 15?

2 Answers

From How to remove overlapping areas from a polygon in MapInfo Pro the procedure seems to be to:

  1. Select the region from which the overlapping areas will be removed.
  2. Objects > Set Target (32-bit) or Spatial > Set Target (64-bit).
  3. Select the overlapping regions.
  4. Objects > Erase (32-bit) or Spatial > Erase (64-bit).

The overlapping polygons will now be erased from original layer

Correct answer by PolyGeo on December 7, 2020

Find the DrawTools application (this links to the 32-bit versions) and use the tool "Remove from selected region" which allows you to draw a polygon and use that to delete from the currently selected object.

It basically deletes the part of the selected object that is inside the drawn polygon.

DrawTools also comes for the 64-bit versions of MapInfo Pro, and can be downloaded directly from the MapInfo Marketplace.

Answered by Peter Horsbøll Møller on December 7, 2020

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