On 28/04/12 10:35, Micha Silver wrote:
On 28/04/2012 00:54, Asher Hoskins wrote:
Hello.
I've got a map with multiple layers that was originally created from a
DXF file (via v.in.dxf). I want to output a single layer as a KML file
so that it can be loaded into Google Earth (for a non-Grass user) but
when I do:
v.out.ogr type=line input=esw_g26a format=KML dsn=main.kml layer=7
I get all layers output, not just layer 7.
Am I doing something silly here?
Not silly, but maybe not what you expect.
Layers are database links, so you could very well have a vector with 7
layers, where all the geographic features, are in all the layers.
Choosing a certain layer mean choosing which attribute table is
connected to the features, but not necessarily which features.
That is not completely true: layers are not connections to attribute
tables, but a means of allowing different (thematic) identifications of
the same features in a vector map. You can optionally link each layer to
an attribute table. Whether a feature exists in a layer or not is
determined by whether that feature has a category value in that layer.
See the recently revised vector intro in the docs for more info [1].
When you display the map, chosing to display only layer 7, what do you
see ? And what does v.category option=report give you ?
Moritz
[1] http://grass.fbk.eu/grass64/manuals/html64_user/vectorintro.html
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