[GRASSLIST:7054] Re: r.to.pg
dassau at gdf-hannover.de
Tue Jun 7 08:26:29 EDT 2005
Am Dienstag, 7. Juni 2005 14:13 schrieb orkun:
> Otto Dassau wrote:
> >Am Dienstag, 7. Juni 2005 12:33 schrieb orkun:
> >>*Where can I find r**.**to**.**pg script to download from ?
> >Maybe someone using GRASS 5.3 or 5.4 can provide it.
> >>* <http://www.grass-gis.de/dassau/r_cross_pg/r.cross.to.pg.html>
> >-> now available again...
> > Otto
> thank you
> I think in grass6 raster to vector does what r.to.pg does internally.
right! you can convert the raster map into vector format and write all
attributes into PostgreSQL. But there is a difference: r.to.pg writes each
pixel value to the table, r.to.vect writes feature (points, lines, polygones)
I guess, it depends on what you want to do. Some years ago, I needed raster
pixel values to be able to calculate statistics with R from PostgreSQL table
entries -> that's why r.to.pg was necessary and useful to me.
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