[GRASS-user] map display query and layers

[Dave Roberts]

Thanks Helmut, Thanks Anna

I compiled the trunk version, and the map query tool now clearly behaves 
differently, but not how I expected

1) it shows all layers in the map query results, regardless of what 
layer (if any) was selected in d.vect

I.e.

d.vect map
d.vect map layer=1
v.vect map layer=2

all have identical results in map query.  In addition, specifying layers 
that don't exist emits no warning, e.g. d.vect map layer=999
works fine, and behaves the same as any of the d.vect commands above

2) it highlights selected features in yellow, and the selected features 
(areas in my case) reflect layer #1, no matter what layer is requested 
in d.vect.  I.e. d.vect map layer=2 map queries highlight layer 1.

I had been working on this with a quite complicated imported data set, 
so to isolate the behavior more clearly I created the data below

(file ascii.txt)
VERTI:
B 5
  0  0
  0 10
10 10
10  0
  0  0
C 1 1
  8  5
  1  1
B 5
10  0
10 10
20 10
20  0
10  0
C 1 1
18  5
   1 2
B 5
  3  3
  3  7
  7  7
  7  3
  3  3
C 1 1
  5  5
  1  2
B 5
13  3
13  7
17  7
17  3
13  3
C 1 1
15  5
  1  1
(end of file)

then

v.in.ascii input=ascii.txt output=ascii format=standard
g.region vect=ascii
v.category --overwrite option=add input=ascii output=new_ascii
     layer=2 type=centroid

# check results

v.category ascii op=report
# 1 layer, 4 centroids with cats 1 & 2
v.category new_ascii op=report
# 2 layers, L1 4 centroids with cats 1,2 L2 4 centroids cats=1,2,3,4

d.vect new_ascii layer=2

# and check results with map query tool

Thanks, Dave


On 10/04/16 01:31, Helmut Kudrnovsky wrote:
>
>
>   >At any rate, since I did not edit what.c to apply Moritz's patch
>> none of this affects my issues with map display query or >d.what.vect.
>> I'll get back to that in a subsequent post.
>
> Fyi
>
> http://lists.osgeo.org/pipermail/grass-commit/2016-
> October/040536.html
>
> Anna committed the patch to trunk ; so if may be able to switch to trunk for
> compiling, this v.what addition is available there without the need of
> manually patching.
>
>
>
> -----
> best regards
> Helmut
> --
> View this message in context: http://osgeo-org.1560.x6.nabble.com/map-display-query-and-layers-tp5288830p5289152.html
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