st_difference
How PostGIS runs Difference: st_difference.
| Engine | PostGIS |
|---|---|
| Tool name | st_difference |
| Interface | sql |
| Implements | Difference |
| Documentation | Not stated |
| Effects | modifies input: no, network: no |
| Notes | Not stated |
| Status | active |
Parameters
| Name | Type | Required | Default | Choices | Note |
|---|---|---|---|---|---|
geom1 | geometry | no | Not stated | Not stated | Not stated |
geom2 | geometry | no | Not stated | Not stated | Not stated |
gridsize | double precision | no | '-1.0'::numeric | Not stated | Not stated |
SQL overloads
-
st_difference(geom1 geometry, geom2 geometry, gridsize double precision DEFAULT '-1.0'::numeric) → geometry
How it maps to the operation
| Operation parameter | Parameter here | Note |
|---|---|---|
layer | geom1 | Not stated |
mask | geom2 | Not stated |
Differences from the operation
- Per pair of geometries: union the mask first to subtract all of it.
Harvested by the postgis harvester from engine version
3.7.0. Names can change when an engine is harvested again.