[GRASS-dev] v.out.ascii features without category

[Markus Metz]

On Wed, Apr 10, 2013 at 9:17 PM, Martin Landa <landa.martin at gmail.com> wrote:
> Hi,
>
> 2013/4/10 Markus Metz <markus.metz.giswork at gmail.com>:
>>> Is there any reason why `v.out.ascii` ignores features without
>>> category? I would suggest to export also features without categories.
>>> Probably also to add new flag "Export only features with category".
>>
>> Try v.out.ascii n1 layer=-1
>>
>> Default is layer=1 which means only features with a category in layer
>> 1 are exported.
>
> it will not help.
>
> v.random out=n n=9 --o
> v.category in=n out=n1 opt=del cat=1 --o
> v.category in=n1 out=n2 opt=del cat=2 --o
> v.category in=n2 out=n3 opt=add cat=1 layer=2 id=2 --o
>
> v.category in=n out=n4 opt=del cat=-1 --o
>
> v.category n3 opt=report -g
> 2 point 1 1 1
> 2 all 1 1 1
> 1 point 7 3 9
> 1 all 7 3 9
>
> v.category n4 opt=report -g
> -
>
> v.out.ascii n4
> WARNING: No points found, nothing to be exported
>
> v.out.ascii n4 layer=-1
> WARNING: No points found, nothing to be exported
>
> with the attached patch

The patch is too complicated, try r55697 with v.out.ascii n4 layer=-1.

>
> v.out.ascii n4
> WARNING: 9 features without category skipped
> WARNING: No points found, nothing to be exported
>
> v.out.ascii n4 -n
> 670755.23990231|227618.61631252
> 620883.1020781|226045.94127863
> 638523.42465594|215548.98640595
> 631947.37828546|233349.16461906
> 666867.49326076|222508.09307827
> 658560.98004952|215292.28603514
> 677636.85184101|217348.6624036
> 660936.63949697|196528.06251007
> 625663.81562346|242921.76110523
>
> v.out.ascii n3
> 638523.42465594|215548.98640595|3
> 631947.37828546|233349.16461906|4
> 666867.49326076|222508.09307827|5
> 658560.98004952|215292.28603514|6
> 677636.85184101|217348.6624036|7
> 660936.63949697|196528.06251007|8
> 625663.81562346|242921.76110523|9
> WARNING: 2 features without category skipped <- id=1,2
>
> v.out.ascii n3 -n
> 670755.23990231|227618.61631252
> 638523.42465594|215548.98640595|3
> 631947.37828546|233349.16461906|4
> 666867.49326076|222508.09307827|5
> 658560.98004952|215292.28603514|6
> 677636.85184101|217348.6624036|7
> 660936.63949697|196528.06251007|8
> 625663.81562346|242921.76110523|9
> WARNING: 1 features without category skipped <- id=2
>
> v.out.ascii n3 layer=2
> 620883.1020781|226045.94127863|1
> WARNING: 8 features without category skipped <- id=1,3-9
>
> 670755.23990231|227618.61631252
> 620883.1020781|226045.94127863|1
> WARNING: 7 features without category skipped <- id=3-9
>
> Btw, is there a way how to delete more categories in one step?
>
> v.category in=n out=n1 opt=del cat=1 --o
>
> works, but how to delete in one step more cats, eg.
>
> v.category in=n out=n1 opt=del cat=1-2 --o
>
> will not work because `cat` accepts only one value and not the range.
>
> Martin