[GRASS-user] raster map merge

GRASS GRASS user
,
1

Hi
I want to merge many raster maps.
This map is imported by 'r.in.gdal'command.
I don't know to use any command.
please help me!

2

YuGo schrieb:

Hi
I want to merge many raster maps.
This map is imported by 'r.in.gdal'command.
I don't know to use any command.
please help me!

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You can try r.patch but if you have many maps and they don't overlay
then there are better ways to do it. There was a similar post a few days
ago and there was suggested to use gdalwarp but you can also use
gdal_translate to do that.

Regards
Wolfgang

3

YuGo wrote:

I want to merge many raster maps.
This map is imported by 'r.in.gdal'command.

spatial merge:
  g.region rast=map1,map2,map3,... ; r.patch

spectral merge:
  r.composite, d.rgb

Hamish

4

YuGo schrieb:
> I want to merge many raster maps.

WolfgangZillig wrote:

You can try r.patch but if you have many maps and they don't overlay
then there are better ways to do it. There was a similar post a few days
ago and there was suggested to use gdalwarp but you can also use
gdal_translate to do that.

"r.series method=average" is good too.

Hamish