On 09/04/08 14:55, M S wrote:
I would like to import the XYZ to build the geometry for 3D points, and
have only "Cat" and "Code" in the attribute table. ("Code" being a
column name for the 4th column in the input ASCII). I cant seem to find
the combination of column definitions and other parameters to achieve
this. One option seems to import them all as "x double, y double, z
double, code int", and then after the import, drop the x,y,z columns.
Is it possible to put the first 3 ASCII column values to the geometry,
and use only the last column as an attribute?
I'm not sure I really understand your problem. Maybe you could send us
the layout of your file (head -2) and the v.in.ascii command you tried.
You need to specify the _column number_ of your X,Y and Z columns with
the x=, y= and z= parameters, the _column number_ of you cat column with
the cat= parameter, and the attribute columns with the columns= parameter.
So if I understand your file correctly it would be something like this:
v.in.ascii -z [...] x=1 y=2 z=3 cat=4 columns="code int"
You might also want to use the -b flag, as topology building can lead to
overload if the input data file is too large.
Moritz
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user
