Re: [GRASS-user] Collapsing many layers into 1
My problem is a little different. I have just one map, but many layers. I want to get one map, with just one layer. On Tue, 2008-01-22 at 10:58 +0100, Martin Landa wrote: Hi, 2008/1/22, Neil Godfrey [EMAIL PROTECTED]: The census 2000 administrative boundaries are shapefiles, where every county is a separate file. So v.in.ogr creates a layer for every county. So for example, I get 83 layers for the 83 counties in Michigan, which correspond to 83 tables, each with just one category. What I want is one layer with 83 categories. I've had no luck with v.overlay, v.extract, v.patch, etc. because all those tools preserve the layers in the output map. Is there any way to do this? If the attribute tables have the same structure (number of columns, data types and key column), you can patch maps using v.patch -e in=`g.mlist vect pat='con*' out=con_patch v.clean in=con_patch out=con_clean tool=snap,break,rmdupl thresh=[value] ? Martin ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Collapsing many layers into 1
Hi,
2008/1/23, Neil Godfrey [EMAIL PROTECTED]:
My problem is a little different. I have just one map, but many layers.
I want to get one map, with just one layer.
you can use `v.category chlayer=` to change layer number, but it will
not touch attribute data.
v.category in=map out=map_1 chlayer=2,1,3,1,4,1
You can also extract layers to single-layer vector maps and the to patch them.
for layer in `seq 2 10`; do
v.extract in=map out=map_${layer} layer=$layer where=cat0;
done
v.patch in=`g.mlist vect pat=map_*` out=map_patch -e
v.clean ...
Martin
On Tue, 2008-01-22 at 10:58 +0100, Martin Landa wrote:
Hi,
2008/1/22, Neil Godfrey [EMAIL PROTECTED]:
The census 2000 administrative boundaries are shapefiles, where every
county is a separate file. So v.in.ogr creates a layer for every
county. So for example, I get 83 layers for the 83 counties in
Michigan, which correspond to 83 tables, each with just one category.
What I want is one layer with 83 categories. I've had no luck with
v.overlay, v.extract, v.patch, etc. because all those tools preserve the
layers in the output map.
Is there any way to do this?
If the attribute tables have the same structure (number of columns,
data types and key column), you can patch maps using
v.patch -e in=`g.mlist vect pat='con*' out=con_patch
v.clean in=con_patch out=con_clean tool=snap,break,rmdupl thresh=[value]
?
Martin
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Re: [GRASS-user] Collapsing many layers into 1
Hi, 2008/1/23, Martin Landa [EMAIL PROTECTED]: v.category in=map out=map_1 chlayer=2,1,3,1,4,1 ops, sorry, of course v.category in=map out=map_1 opt=chlayer layer=2,1,3,1,4,1 Martin -- Martin Landa [EMAIL PROTECTED] * http://gama.fsv.cvut.cz/~landa * ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Collapsing many layers into 1
Hi, 2008/1/22, Neil Godfrey [EMAIL PROTECTED]: The census 2000 administrative boundaries are shapefiles, where every county is a separate file. So v.in.ogr creates a layer for every county. So for example, I get 83 layers for the 83 counties in Michigan, which correspond to 83 tables, each with just one category. What I want is one layer with 83 categories. I've had no luck with v.overlay, v.extract, v.patch, etc. because all those tools preserve the layers in the output map. Is there any way to do this? If the attribute tables have the same structure (number of columns, data types and key column), you can patch maps using v.patch -e in=`g.mlist vect pat='con*' out=con_patch v.clean in=con_patch out=con_clean tool=snap,break,rmdupl thresh=[value] ? Martin -- Martin Landa [EMAIL PROTECTED] * http://gama.fsv.cvut.cz/~landa * ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Collapsing many layers into 1
Hello, The census 2000 administrative boundaries are shapefiles, where every county is a separate file. So v.in.ogr creates a layer for every county. So for example, I get 83 layers for the 83 counties in Michigan, which correspond to 83 tables, each with just one category. What I want is one layer with 83 categories. I've had no luck with v.overlay, v.extract, v.patch, etc. because all those tools preserve the layers in the output map. Is there any way to do this? Thanks, Neil ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
