please restore important thematic map features themetype, themecalc etc.

[landam]

Reported by jamesp670 on 9 Feb 2015 18:27 UTC 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

GRASS GIS version and provenance

svn-releasebranch70

Migrated-From: https://trac.osgeo.org/grass/ticket/2582

[landam]

Modified by @landam on 12 May 2016 06:44 UTC

[landam]

Modified by wenzeslaus on 13 May 2016 17:55 UTC

[landam]

Comment by wenzeslaus on 14 May 2016 01:32 UTC See also https://trac.osgeo.org/grass/ticket/2494.

[landam]

Comment by @landam on 27 Aug 2016 13:42 UTC Milestone renamed

[landam]

Comment by neteler on 26 Jan 2018 11:40 UTC Ticket retargeted after milestone closed

[landam]

Comment by @landam on 28 Jan 2018 11:01 UTC What is status of this issue?

[landam]

Comment by jamesp670 on 13 Feb 2018 07:18 UTC For my part, I'm happy that d.vect.thematic2 in addons is potentially a solution. It would be better if the built-in C version implemented these features from Grass 6.4.

Moritz asked me to "file enhancement requests against that module for the different feature you would like to see". I looked at doing that but I do not see any better way to file the feature request. There isn't a component that is relevant more detailed than "Display" which I chose for the original bug.

The larger architectural issues raised by Moritz are beyond my ken. His mailing list post at 072918.html doesn't seem to address the needs of a psmap user making a thematic map.

So that's my point of view three years on. More details on how to refile the bug would be welcome. I am always glad to cooperate with this amazing dev. team. Thank you for what you do.

[landam]

Modified by neteler on 12 Jun 2018 20:48 UTC

[landam]

Comment by @landam on 25 Sep 2018 16:52 UTC All enhancement tickets should be assigned to 7.6 milestone.

[landam]

Comment by @landam on 25 Jan 2019 21:07 UTC Ticket retargeted after milestone closed