[GRASS-dev] [GRASS GIS] #3122: d.legend.vect: possibility to change text of displayed labels and select labels to show/not show

[GRASS GIS]

#3122: d.legend.vect: possibility to change text of displayed labels and select
labels to show/not show
-------------------------+-------------------------------------------------
  Reporter:  veroandreo  |      Owner:  grass-dev@…
      Type:              |     Status:  new
  enhancement            |
  Priority:  normal      |  Milestone:  7.3.0
 Component:  Display     |    Version:  unspecified
Resolution:              |   Keywords:  d.legend.vect, gsoc2016,
       CPU:              |  cartography
  Unspecified            |   Platform:  Unspecified
-------------------------+-------------------------------------------------

Comment (by mlennert):

 Replying to [comment:5 veroandreo]:
 > Replying to [comment:4 mlennert]:
 > > Replying to [comment:3 veroandreo]:
 > > > Replying to [comment:2 mlennert]:
 > > > > Replying to [comment:1 annakrat]:
 > > > > > Replying to [ticket:3122 veroandreo]:
 > > > > > > Hello,
 > > > > > >
 > > > > > > I've been testing the new d.legend.vect and it is great :)
 > > > > > >
 > > > > > > However, I found that it would be even better if one could
 change the label displayed. Not always the name of the vector map is the
 best option, especially if one is displaying for example only one category
 of an attribute. For instance, I have presence/absence points and only
 want to display presence points. I'd like to be able to tweak the label to
 be "presence" instead of the name of the vector map.
 > > > > >
 > > > > > This is already possible using d.vect parameter legend_label.
 > > >
 > > > Oh, I missed that one
 > > >
 > > > > Yes, but this does not seem to like spaces. If I use a label such
 as "Areas < 10e6" it only displays "Areas". Same with "Large Areas", I
 only get "Large" in the display. It does not make any difference if I
 enclose the text in quotes, or not.
 > > >
 > > > Same here :(
 > > >
 > > > Don't know how difficult it might be, but maybe it would be easier
 (and more visible, probably) from a user point of view, if that
 "legend_label" parameter would be integrated in d.legend.vect, instead of
 having to set the label in d.vect to then have it displayed with
 d.legend.vect
 > >
 > > I prefer to have it in d.vect as that is where the layer is defined.
 In d.legend.vect, this would be awkward as a d.legend.vect call could
 concern anything from 1-X layers and so potentially you would need X text
 fields to define labels and X is not defined beforehand. So, I would plead
 to keep it as is, but just to improve the handling of special characters,
 including spaces, in the text.
 >
 > ok, I see... Shall we then open a different enhancement ticket for
 "better handling of special characters and spaces in legend_label
 parameter of d.vect" and keep this one for the possibility of choosing
 which vector labels to show / not show in the vector legend??

 Special characters (e.g. accents) are handled without problems. The only
 issue seems to be spaces.

 For labels, a white space in the d.vect legend_label parameter might be an
 easy solution for not displaying labels.

 When you say in your original ticket:

 >Also, sometimes one has boundaries of countries or coastlines that should
 go on the
 >map but doesn't need to have a label in the legend.

 are you really speaking about the labels, or about the fact that you would
 like to not have boundaries or coastlines in the legend at all ? If the
 former, maybe the white space option (or writing 'None' or something like
 that as the label) would be the easiest. If the latter, I guess the best
 solution would probably be adding an 'no legend label' flag to d.vect.

 But you're right, I'll file a different ticket for the handling of spaces.

--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3122#comment:6>
GRASS GIS <https://grass.osgeo.org>