[GRASS-user] Copying Raster Map from PERMANENT to Project Mapset

GRASS GRASS user
1

   As you've read here the past couple of days, it took a bit for me to grok
how to set the project mapset bounds as a subset of the PERMANENT mapset
bounds and use g.copy on each map. They all display nicely in the monitor.

   However, when I use g.copy on the DEM, nothing displays in the monitor
despite the entire 672M file being copied from PERMANENT.

   What I want is only that portion of the DEM within the smaller project
bounds, and I want to be able to see it in the monitor so I can drape
basins, project property, and streams on it. I'm not sure where I went
wrong, so if you have some ideas on possible causes, please let me know.

Rich

2

Hi,

g.copy will copy the whole map in the new mapset. If you want to get only the portion of the DEM within the region of the new mapset, you will have to use r.mapcalc !
be carafull to proprely set the resolution to that of your DEM, otherwise it will be resampled and look quite bad …

Sylvain

2011/7/27 Rich Shepard <rshepard@appl-ecosys.com>

As you’ve read here the past couple of days, it took a bit for me to grok
how to set the project mapset bounds as a subset of the PERMANENT mapset
bounds and use g.copy on each map. They all display nicely in the monitor.

However, when I use g.copy on the DEM, nothing displays in the monitor
despite the entire 672M file being copied from PERMANENT.

What I want is only that portion of the DEM within the smaller project
bounds, and I want to be able to see it in the monitor so I can drape
basins, project property, and streams on it. I’m not sure where I went
wrong, so if you have some ideas on possible causes, please let me know.

Rich

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3

On Fri, 29 Jul 2011, Sylvain Maillard wrote:

g.copy will copy the whole map in the new mapset. If you want to get only
the portion of the DEM within the region of the new mapset, you will have
to use r.mapcalc ! be carafull to proprely set the resolution to that of
your DEM, otherwise it will be resampled and look quite bad ...

Sylvain,

   Thank you.

Rich