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Results tagged with postgis
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user 14196
PostGIS is an extension for the PostgreSQL object-relational database that adds support for geographic objects.
3
votes
2
answers
235
views
Compare row to all others in PostGIS
Given a PostGIS table of polygons, what is the best way to check if each geometry is inside the union (ST_Collect) of all other geometries from the same table? …
- 1,208
6
votes
2
answers
983
views
PostGIS Geography Buffer producing different areas?
I'm trying to create circles of equal area in different places, but depending on the location of the centroid different areas are calculated. For example
SELECT ST_Area(ST_Buffer('POINT(0 0)'::geogra …
- 1,208
16
votes
Fixing non-noded intersection problem using PostGIS
I ran into this same problem (Postgres 9.1.4, PostGIS 2.1.1), and the only thing that worked for me was to wrap the geometry with a very small buffer. …
- 1,208
1
vote
Accepted
6
votes
2
answers
2k
views
Editing PostGIS topology in web browser
I am trying to conceptualize the best process for editing topology from PostGIS in a web browser. … Ideally what I would like to accomplish is the loading of a topology (imagine the lower 48 states of the US), adjusting the borders, and updating a PostGIS table with the changes. …
- 1,208
11
votes
1
answer
657
views
Point sampling along a pole-wrapping coastline with PostGIS
I am working on a task that requires me to get sample points every 1000 km along coastlines, and have run into a problem with Antarctica. From what I can tell, it seems to be an issue with the use of …
- 1,208