New answers tagged geometry
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PostGIS: Correct way of using ST_Union/ST_Difference with or without gridsize
I found some algorithms to remove the spikes that can be seen in the question, and for provided example it worked, but for more complex examples still st_touches is not working. I will leave the links,...
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Accepted
PostGIS: Correct way of using ST_Union/ST_Difference with or without gridsize
Using a grid size argument in the overlay functions is a good way to avoid the spikes that you are seeing in the full-precision results.
ST_Touches is a very specific spatial situation. It would be ...
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Validating KML geometries with Python
@ehi answered their own question.
With the tip from @user2856 I manage to check the geometry.
kml_start = "<kml xmlns='http://www.opengis.net/kml/2.2'><Placemark><name>...
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Loading selected geometry from GeoParquet with multiple geometry columns into QGIS
The GeoParquet I tested with "multigeom.parquet" has "name", "multipoly_geom" and "centroid_geom" columns.
Using ogrinfo I can select each geometry column ...
- 69.5k
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Calculating the sum of perimeters of all polygon features in QGIS
Another option is to use the Statistical Summary tool.
Type $perimiter in the input:
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Validating KML geometries with Python
This is possible with fastkml >= 1.1
>>> from fastkml import Point
>>> p = Point.from_string('<Point><coordinates>2.34880,48.85341</coordinates></Point>')
&...
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Seeking tool to fix overlapping polygons in ArcGIS Pro
This can be done with advanced license. Picture shows polygon names and their dominance:
Use feature to polygon to get non-overlapping polygons (BITS), followed by feature to point (inside). ...
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Accepted
Calculating the sum of perimeters of all polygon features in QGIS
This tutorial "Calculating Line Lengths and Statistics" shows you how to populate the feature length using $length. You can populate the attribute table with $perimeter in the units of ...
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