[Qgis-user] How do I clean up this geometry?

[David Greenewalt]

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, qgis-user at stripfamily.net 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.
>
>
>
>
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