[GRASS-user] multiple polygons with same cat

[Dave Roberts]

Markus,

    Thanks a mill!  I'll try that when I get back to that machine.

    I really appreciate you time end expertise.  You're a scholar and a 
gentleman.

Dave

On 11/26/2013 08:48 AM, Markus Metz wrote:
> On Tue, Nov 26, 2013 at 4:34 PM, Dave Roberts
> <dvrbts at ecology.msu.montana.edu>  wrote:
>>> I would suggest to run
>>>
>>> v.category inp=geo type=centroid out=new_geo op=add layer=2 --o
>>>
>>
>> Thanks Markus!  Now I'm getting somewhere.  v.info shows geo and new_geo in
>> perfect correspondence for areas, islands, boundaries, etc.
>>
>> d.what.vect shows new_geo with the original data in layer 1 and the new data
>> in layer 2.  v.to.db successfully transferred the centroids (coor) and area
>> to layer 2.  However, I still don't see how to get the surficial geology
>> column (surgeo) out of layer 1 into layer 2 without a join item.  I know I'm
>> missing something simple, but v.to.db just seems to allow a restricted set
>> of values for option.
>
> v.to.db map=new_geo layer=2 column=surgeo option=query qlayer=1 qcolumn=surgeo
>
> In this example, the column surgeo in layer 2 must exist and must be
> of the same type like the column surgeo in layer 1.
>
> Markus M
>
>>
>> Thanks, Dave
>>
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> David W. Roberts                                     office 406-994-4548
>> Professor and Head                                      FAX 406-994-3190
>> Department of Ecology                         email droberts at montana.edu
>> Montana State University
>> Bozeman, MT 59717-3460

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David W. Roberts                                     office 406-994-4548
Professor and Head                                      FAX 406-994-3190
Department of Ecology                         email droberts at montana.edu
Montana State University
Bozeman, MT 59717-3460