[postgis-devel] ST_GetValues()

[Paul Ramsey]

> On Apr 16, 2021, at 9:43 AM, Regina Obe <lr at pcorp.us> wrote:
>>> 
> [Regina Obe] We  have a function that burns geometries into a raster - it's
> called ST_SetValues -
> http://postgis.net/docs/manual-dev/RT_ST_SetValues.html

See, I'm not so crazy after all...! The opposite of burning geometry values into a raster (ST_SetValues()) is reading raster values into a geometry (ST_GetValues())

???? ;)

P

> Then there is ST_DumpAsPolygons which converts a raster to a set of geomvals
> (geom, value).   -
> http://postgis.net/docs/manual-dev/RT_ST_DumpAsPolygons.html
> 
> Paul's new function will largely replace the use of this function.  Common
> use case of this function was
> 
> ST_DumpAsPolygons(ST_Clip(raster,ref_geom))
> 
> And then use the val of the geomvals returned to reconstitute a new geometry
> with Z/M (borrowed from the values)
> 
> 
> 
> 
> 
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