ST_Polygonize/Shapely cannot polygonize when overlapping with shared node/point The 2019 Stack Overflow Developer Survey Results Are In Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Help with PostGIS polygon geometry - non-closed ringsInstall Shapely with GEOS on herokuError and kernel dies with shapely/geos inside Jupyter notebookWhy won't my points (that I created by intersection) intersect with the geometry they've been created from?Drawing ellipse with shapely?Closest point to road intersections with GeoPandas and ShapelyShapely python spatial join - point with lineWhy does a LINESTRING change in length after union with a shorter but completely-overlapping LINESTRING?Shapely with IronPython 2.7Invalid Shapefile of Shapely polygons written with Fiona
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ST_Polygonize/Shapely cannot polygonize when overlapping with shared node/point
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Help with PostGIS polygon geometry - non-closed ringsInstall Shapely with GEOS on herokuError and kernel dies with shapely/geos inside Jupyter notebookWhy won't my points (that I created by intersection) intersect with the geometry they've been created from?Drawing ellipse with shapely?Closest point to road intersections with GeoPandas and ShapelyShapely python spatial join - point with lineWhy does a LINESTRING change in length after union with a shorter but completely-overlapping LINESTRING?Shapely with IronPython 2.7Invalid Shapefile of Shapely polygons written with Fiona
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I'm trying to use both polygonize_full (Shapely, python) and ST_Polygonize (postgis) to get all polygons from a set of line strings.
There is one case where it fails: when there is an "overlapping polygon" with a shared "node".
Pictured here: 
The result set is empty, but shapely provides a 'dangles' that provides the entire "failed" linestring,
Has anyone encountered this? Is there a way to gracefully solve this? I couldn't find anything in the docs.
I would expect these two be two separate polygons that overlap each other, despite their shared node.
Here's the WKT I'm using for example.
MULTILINESTRING((-122.43682090001732 37.767652910517015,-122.4366733785215 37.767652910517015),(-122.4366733785215 37.767652910517015,-122.4366733785215 37.76759990327466),(-122.4366733785215 37.76759990327466,-122.43682090001732 37.76759990327466),(-122.43682090001732 37.76759990327466,-122.43682090001732 37.767652910517015),(-122.43682090001732 37.767652910517015,-122.43675920920998 37.767717579352684),(-122.43675920920998 37.767717579352684,-122.43675920920998 37.767626406895836),(-122.43675920920998 37.767626406895836,-122.43682090001732 37.767652910517015))
postgis shapely polygonize geos
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
add a comment |
I'm trying to use both polygonize_full (Shapely, python) and ST_Polygonize (postgis) to get all polygons from a set of line strings.
There is one case where it fails: when there is an "overlapping polygon" with a shared "node".
Pictured here:
The result set is empty, but shapely provides a 'dangles' that provides the entire "failed" linestring,
Has anyone encountered this? Is there a way to gracefully solve this? I couldn't find anything in the docs.
I would expect these two be two separate polygons that overlap each other, despite their shared node.
Here's the WKT I'm using for example.
MULTILINESTRING((-122.43682090001732 37.767652910517015,-122.4366733785215 37.767652910517015),(-122.4366733785215 37.767652910517015,-122.4366733785215 37.76759990327466),(-122.4366733785215 37.76759990327466,-122.43682090001732 37.76759990327466),(-122.43682090001732 37.76759990327466,-122.43682090001732 37.767652910517015),(-122.43682090001732 37.767652910517015,-122.43675920920998 37.767717579352684),(-122.43675920920998 37.767717579352684,-122.43675920920998 37.767626406895836),(-122.43675920920998 37.767626406895836,-122.43682090001732 37.767652910517015))
postgis shapely polygonize geos
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
1
Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43
add a comment |
I'm trying to use both polygonize_full (Shapely, python) and ST_Polygonize (postgis) to get all polygons from a set of line strings.
There is one case where it fails: when there is an "overlapping polygon" with a shared "node".
Pictured here:
The result set is empty, but shapely provides a 'dangles' that provides the entire "failed" linestring,
Has anyone encountered this? Is there a way to gracefully solve this? I couldn't find anything in the docs.
I would expect these two be two separate polygons that overlap each other, despite their shared node.
Here's the WKT I'm using for example.
MULTILINESTRING((-122.43682090001732 37.767652910517015,-122.4366733785215 37.767652910517015),(-122.4366733785215 37.767652910517015,-122.4366733785215 37.76759990327466),(-122.4366733785215 37.76759990327466,-122.43682090001732 37.76759990327466),(-122.43682090001732 37.76759990327466,-122.43682090001732 37.767652910517015),(-122.43682090001732 37.767652910517015,-122.43675920920998 37.767717579352684),(-122.43675920920998 37.767717579352684,-122.43675920920998 37.767626406895836),(-122.43675920920998 37.767626406895836,-122.43682090001732 37.767652910517015))
postgis shapely polygonize geos
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
I'm trying to use both polygonize_full (Shapely, python) and ST_Polygonize (postgis) to get all polygons from a set of line strings.
There is one case where it fails: when there is an "overlapping polygon" with a shared "node".
Pictured here:
The result set is empty, but shapely provides a 'dangles' that provides the entire "failed" linestring,
Has anyone encountered this? Is there a way to gracefully solve this? I couldn't find anything in the docs.
I would expect these two be two separate polygons that overlap each other, despite their shared node.
Here's the WKT I'm using for example.
MULTILINESTRING((-122.43682090001732 37.767652910517015,-122.4366733785215 37.767652910517015),(-122.4366733785215 37.767652910517015,-122.4366733785215 37.76759990327466),(-122.4366733785215 37.76759990327466,-122.43682090001732 37.76759990327466),(-122.43682090001732 37.76759990327466,-122.43682090001732 37.767652910517015),(-122.43682090001732 37.767652910517015,-122.43675920920998 37.767717579352684),(-122.43675920920998 37.767717579352684,-122.43675920920998 37.767626406895836),(-122.43675920920998 37.767626406895836,-122.43682090001732 37.767652910517015))
postgis shapely polygonize geos
postgis shapely polygonize geos
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
edited Apr 7 at 4:16
Kevin Redman
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
asked Apr 6 at 23:22
Kevin RedmanKevin Redman
134
134
1
Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43
add a comment |
1
Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43
1
1
Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43
Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43
add a comment |
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Please use the SE UI to embed pictures. Links to third-party sites are more likely to fail, and less likely to be followed.
– Vince
Apr 6 at 23:43