[GRASS-dev] Re: [GRASS GIS] #377: gis.m/Map Display fails to handle vector layers with multiple databse layers

Moritz Lennert mlennert at club.worldonline.be
Sun Dec 28 09:14:22 EST 2008


On Fri, December 26, 2008 18:17, Michael Barton wrote:
>
>
> On Dec 26, 2008, at 9:59 AM, GRASS GIS wrote:

[...]

>> well, and archsites at PERMANENT contains some elements in layer 2?
>>
>> {{{
>> v.category archsites at PERMANENT opt=report
>> }}}
>>
>> ?
>
> Yes. I essentially duplicated the dbf for layer 1 and connected the
> new dbf as layer 2, so I know it should be OK.

Duplicating the dbf and connecting it (with v.db.connect) to another
layer, does not create any features on that layer. To do that, you have to
assign category values to features in that layer, with either v.category
or v.digit.

I think there is still a need to a much clearer and more detailed tutorial
on layer handling, as this keeps popping up...

Moritz



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