Geography · Geographical Information System (GIS)
In GIS spatial analysis, the 'UNION' overlay operation refers to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Overlaying polygons and keeping all areas and features from both input layers✓
- 2Keeping only those features of the first layer that fall within the second layer
- 3Keeping only the overlapping intersection areas of both input layers
- 4Erasing the area of the first input layer using the boundary of the second layer
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Overlaying polygons and keeping all areas and features from both input layers
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