I notice that the small polygon is a separate park. You could delete the polygon. (or leave it as the separate area).   If the polys are to be merged, you could manually edit the boundary (pull the vertices) so they overlap completely, and then merge the polys.

If v.clean doesn't address all the problems and there are too many, you could build the polys from lines. If the lines are correct, the polys created from them will be clean.

David




On 1/8/2021 3:28 PM, [email protected] wrote:
This linked <https://drive.google.com/file/d/1o1KthonUPSZGWp6QImS9btbj799Lv-om/view?usp=sharing> file, proclaimed.zip, is the boundary of the Santa Fe National Forest as supplied by the USFS.
If you focus on this area




There is some problematic geometry. If I do a dissolve I get this:



If I remove the holes, I'm left with this bit of stray boundary:


I then remove that with edit nodes. But the resulting polygon is still not clean  - if I try to use the field calculator to add the area (using $area), I get /null.
/There is bad geometry that I'm not spotting, but how do I find it?


The second linked <https://drive.google.com/file/d/1ul60p0rSdwKcmt6zUivSMIPQHXYc_rcT/view?usp=sharing>file, clean.zip, is the result of the steps above.




_______________________________________________
Qgis-user mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
_______________________________________________
Qgis-user mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

Reply via email to