On 18-04-17 09:32, Paulo van Breugel wrote:
Hi devs,
Converting a vector to raster does in some specific cases yields
yields issues with the labeling. E.g., the following (example from NC
dataset) results in a layer with each raster cells assigned a category
label (the name of the municipality):
v.to.rast input=boundary_municp output=A01 use=attr
attribute_column=OBJECTID label_column=MB_NAME type=area
Running the following will give a raster in which a portion of the
cells do not have a label.
v.extract input=boundary_county where="NAME='WAKE'" output=WakeCounty
v.overlay ainput=boundary_municp binput=WakeCounty operator=and
output=WakeMunicp olayer=0,1,0
g.region vector=WakeMunicp res=100 -a
v.to.rast input=WakeMunicp output=A02 use=attr
attribute_column=OBJECTID label_column=MB_NAME type=area
I also tried:
v.extract input=boundary_municp where="COUNTY='WAKE'" output=WakeMunicp2
g.region vector=WakeMunicp2 res=100 -a
v.to.rast input=WakeMunicp2 output=A03 use=attr
attribute_column=OBJECTID label_column=MB_NAME type=area
Same results, some of the raster cells do not get a label. I guess I
am overlooking something here, but I can't figure out what goes wrong
here. Any ideas?
Addition info, if I look at the cats file in
~/nc_spm_08_grass7/user1/cats of A02 or A03 (created earlier, see
above), there are a number or rows that look like e.g.,:
992:996:Morrisville
The same category values in the cats file of A01 are:
992:Morrisville
994:Lexington
996:Morrisville
Regards
Paulo
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