[GRASS-user] simultaneous raster maps export

GRASS GRASS user
1

Hi to all,

i try to export, together in one file, 2 or 3 raster maps displayed simultaneously in Grass, so they will remain referenced together and furtherly used seperately or together. Does anybody has any idea if this can happen and how (also to which format)? In ArcGis it can be done in vrml2 (.wrl) format easily. Thanks.

2

2011/9/21 giannis Nj <netsagief@hotmail.com>:

Hi to all,

i try to export, together in one file, 2 or 3 raster maps displayed
simultaneously in Grass, so they will remain referenced together and
furtherly used seperately or together. Does anybody has any idea if this can
happen and how (also to which format)?

You can export the raster maps separately and then merge them into
a single GeoTIFF file.

see
http://gfoss.blogspot.com/2008/06/gdal-raster-data-tips-and-tricks.html
-> Merge various map/bands into a RGB composite

Markus

3

Hi Marcus and thanks for the answer,

i tried your tip but this doesn’t work for me, because my firstly imported .tiff layers mostly cover one another, they are not just side-by-side, so if i make them one file i won’t be able to use them seperately in the covered areas. Also i want to add a .shp file on top of them and export all together in one schema. I don’t know if it is clear what i want, but it is very simple in close-source gis. Does anyone has any idea how i can make this happen in open-source or it is not possible yet? My whole thesis collapsed at this point, so any help would be precious! Thanx.

From: neteler@osgeo.org
Date: Thu, 22 Sep 2011 08:42:20 +0200
Subject: Re: [GRASS-user] simultaneous raster maps export
To: netsagief@hotmail.com
CC: grass-user@lists.osgeo.org

2011/9/21 giannis Nj netsagief@hotmail.com:

Hi to all,

i try to export, together in one file, 2 or 3 raster maps displayed
simultaneously in Grass, so they will remain referenced together and
furtherly used seperately or together. Does anybody has any idea if this can
happen and how (also to which format)?

You can export the raster maps separately and then merge them into
a single GeoTIFF file.

see
http://gfoss.blogspot.com/2008/06/gdal-raster-data-tips-and-tricks.html
→ Merge various map/bands into a RGB composite

Markus

4

2011/9/23 giannis Nj <netsagief@hotmail.com>:

Hi Marcus and thanks for the answer,

i tried your tip but this doesn't work for me, because my firstly imported
.tiff layers mostly cover one another, they are not just side-by-side,

Ah, I understood you wanted a *stack* of maps.

so if
i make them one file i won't be able to use them seperately in the covered
areas.

So the input maps are side by side? Then you want to mosaik them
with r.patch.

Also i want to add a .shp file on top of them and export all together
in one schema. I don't know if it is clear what i want,

Not much, say, I don't know what a "schema" means.

but it is very simple in close-source gis.

Like so in open source GIS once we know what you wish :slight_smile:

Markus

5

Hi again!

My input maps (two .tiff and one .shp) makes a pile, they cover each other looking from upside, when i put them in the display i can see them only with transparency. What I want is to export them all together in one file (so that they can keep their reference between them) in an appropriate format so as to insert them in a 3D edit program (with no reference system, thats why i want to export them all together and not one by one) and use them seperately (that’s why r.patch can’t be useful). Imagine that you look the output file from the side, you see 3 different layers (the top, the middle and the lower) that you can use furtherly (p.e. give them volumes). I think it is a bit challenge!

From: neteler@osgeo.org
Date: Sat, 24 Sep 2011 11:55:34 +0200
Subject: Re: [GRASS-user] simultaneous raster maps export
To: netsagief@hotmail.com
CC: grass-user@lists.osgeo.org

2011/9/23 giannis Nj netsagief@hotmail.com:

Hi Marcus and thanks for the answer,

i tried your tip but this doesn’t work for me, because my firstly imported
.tiff layers mostly cover one another, they are not just side-by-side,

Ah, I understood you wanted a stack of maps.

so if
i make them one file i won’t be able to use them seperately in the covered
areas.

So the input maps are side by side? Then you want to mosaik them
with r.patch.

Also i want to add a .shp file on top of them and export all together
in one schema. I don’t know if it is clear what i want,

Not much, say, I don’t know what a “schema” means.

but it is very simple in close-source gis.

Like so in open source GIS once we know what you wish :slight_smile:

Markus