[GRASSLIST:1673] problem with v.extract

GRASS GRASS user
1

Hi,

i try to use v.extract to get a new vector map from an
existing map as following:

v.extract type=line input=old01 output=new01 new=1
list=1

in map old01, there are three categories, i can run
the command above with no error warning and get a new
map new01 with one category.
however, no data is extracted into new01, so i can
display nothing for new01.

could somebody help me with that please?

thanks in advance.

--lu

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2

an lu wrote:

Hi,

i try to use v.extract to get a new vector map from an
existing map as following:

v.extract type=line input=old01 output=new01 new=1
list=1

in map old01, there are three categories, i can run
the command above with no error warning and get a new
map new01 with one category.
however, no data is extracted into new01, so i can
display nothing for new01.

could somebody help me with that please?

thanks in advance.

--lu

Could you send me reports printed by:

v.report -h type=line map=old01 units=c,me
v.support map=new01
v.report -h type=line map=new01 units=c,me

Radim