Timeline for PostGIS query to select number of points per polygon and year
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Oct 11, 2022 at 11:31 | vote | accept | MrXsquared | ||
| Nov 16, 2021 at 18:55 | comment | added | geozelot | @MrXsquared likely an index issue - your query vs mine on the data set I outlined is 3 minutes vs. 20 seconds... | |
| Nov 16, 2021 at 11:13 | comment | added | geozelot |
Note that, while query syntax increases somewhat, ST_Dumping (and potentially even ST_SubDivideing) your MultiPolygons into a fully indexed table will have a significant impact on query time. With 30 simple polygons (30 vertices each), covering roughly 30% of the points layer extent, the LATERAL query returns ~ 1.5 million hits (summed over _cnt) from ~40M points in 20 seconds.
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| Nov 16, 2021 at 10:50 | history | edited | geozelot | CC BY-SA 4.0 |
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| Nov 16, 2021 at 10:39 | history | edited | geozelot | CC BY-SA 4.0 |
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| Nov 16, 2021 at 10:33 | history | edited | geozelot | CC BY-SA 4.0 |
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| Nov 16, 2021 at 10:27 | history | answered | geozelot | CC BY-SA 4.0 |