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Results tagged with adjacency
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user 30184
Spatial relationship where two features share a common border under some interpretation - ie, are 'next to' each other.
1
vote
Determining if polygon not enclosed by other polygons
Another approach: The polygons you want to find have 1-dimensional intersection (lines) with the outer ring of the whole area as an union. If polygon is only touching the outer boundary the intersecti …
- 69.2k
3
votes
Determining if polygon not enclosed by other polygons
I have an answer that should be logically correct but the SQL part is not complete. The idea is based on intersections of adjacent polygons. The intesections are either lines if polygons share segment …
- 69.2k
1
vote
Simplifying adjacent polygons on subset of vertices only
The job can be done with OpenJUMP but the method is generic and any software can be used. What matters is that the software must be able to create a planar graph and build polygons from closed areas b …
- 69.2k
1
vote
Correct non-matching edges between polygons in QGIS
I made tests with QGIS and with OpenJUMP GIS and I think both of them can fix the topology of your data.
As a test data I used two simple adjacent polygons, each one having one vertex that was missing …
- 69.2k
4
votes
Why do clipped polygon features (clipped with adjacent polygon tiles) still overlap with eac...
I can't say how to correct the topology automatically but these images should show what happens.
These are the vertices of the left side polygon (clipped1) and the location of the overlap.
These are …
- 69.2k