[GRASS-dev] [GRASS GIS] #2582: please restore important thematic map features themetype, themecalc etc.

#2582: please restore important thematic map features themetype, themecalc etc.
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Reporter: jamesp670 | Owner: grass-dev@…
     Type: enhancement | Status: new
Priority: normal | Milestone: 7.0.0
Component: Display | Version: svn-releasebranch70
Keywords: | Platform: All
      Cpu: x86-64 |
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In the upgrade from GRASS 6.4.2 to GRASS 7, d.vect.thematic seems to
have changed significantly. This is my tool of choice for making a
legend for vector layers. For example, given a street map of lines
called streetswm, and a column dacount indicating vehicles counted on
a given segment, and with a monitor open, the simplest but still very
useful d.vect.thematic command is:

d.vect.thematic map=streetswm@PERMANENT type=line column=dacount \
\

   themetype=graduated_colors themecalc=interval nint=8 \
\

   colorscheme=blue-red psmap=testthem2
\

In 6.4.2, that outputs both the legend and a nice thematic map using
psmap syntax.

To be clear, I am looking for two separate features:

1. To automatically generate breaks and assign colors to them. I just
    say "gimme 8 intervals in the blue-red" and I get out intelligence
    like "text 14% 54% 632.339 - 752.795 " (from
    testthem2\_legend.psmap).
2. To automatically generate psmap commands, especially for the legend,
    reflecting the breaks and colors automatically assigned in step 1.

UPDATE

Moritz Lennert: wrote in reply to this issue:

You are right that the C-module version is less feature-rich in some
aspects than the original script version. Please file enhancement
requests against that module for the different feature you would like
to see (altough discussions are ongoing on whether this module should
actually continue to be developed or not, see [1]).

The old script module is still available as an addon under the name
d.vect.thematic2 [2] and should be easy to install.

Moritz

[1]
http://lists.osgeo.org/pipermail/grass-dev/2015-January/072918.html
[2]
http://grass.osgeo.org/grass70/manuals/addons/d.vect.thematic2.html

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2582&gt;
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