[GRASS-dev] d.vect -a shows only some elements
mlennert at club.worldonline.be
Fri Oct 20 12:45:53 EDT 2006
> Moritz Lennert wrote:
>> Using d.vect.thematic -u I fill a grassrgb column in the attribute
>> table. See http://moritz.homelinux.org/grass/d_vect_a1.png.
>> But when I try to reuse these colors with d.vect -a, only a few of the
>> regions get filled (with an additional dissolution of common
>> boundaries): http://moritz.homelinux.org/grass/d_vect_a2.png
>> All of the objects in the map have a color code in the grassrgb
>> I cannot reproduce this problem in spearfish, so I am a bit lost.
>> Any ideas ?
> "with an additional dissolution of common boundaries" is causing the
> dissolution is based on common cat, but thematic colors are based on
> "jk" column. areas with a common cat can have different attribute
> e.g. if cat refers to country number, and attr col refers to province
This is not it. The dissolution came from the simple fact, that I used
'd.vect type=area' instead of d.vect type=area,boundary. Sorry, I didn't
realize this before.
So I still have:
GRASS 6.3.cvs (ESPON):~ > psql -d espon -c "select * from temp where
grassrgb is NULL"
cat | nuts2 | jk | dkdldm | ab | lmn | grassrgb
GRASS 6.3.cvs (ESPON):~ > psql -d espon -c "select distinct grassrgb
So, the grassrgb column is filled as it should. To make sure there is
not problem with the colours, I do a seperate d.vect for each range.
This works perfectly: http://moritz.homelinux.org/grass/d_vect_a1.png
But trying to reproduce this with d.vect -a, I get:
As you can see, those regions that are colored, are colored correctly,
but not all regions are colored. If I change the color scheme, I get
exactly the same results: http://moritz.homelinux.org/grass/d_vect_a3.png
It is as if d.vect stopped coloring at one point.
If I display the map in four d.vect calls with where='grassrgb=255:0:0',
etc, it displays fine.
I also get the same problem if I use d.vect.thematic on the cat column...
And I still cannot reproduce this in spearfish. Quite lost...
More information about the grass-dev