[GRASS5] Legends in GRASS

[Helena Mitasova]

just a note - the reason I cannot get cat labels for all categories when I use
the workaround
with the smooth gradient option is that the smooth option always writes only 5
values/labels,
so I get nice legend for soils.ph which has 5 categories and I am out of luck
with geology
which has about 10. I am working with spearfish data set and I guess I must be
quite frustrated
given the number of misspellings I managed to make when writing to Markus.
Sorry for that,

helena

> Helena
>
> (cc to GRASS 5, sorry for so much traffic today)
>
> On Fri, Nov 02, 2001 at 11:24:12AM -0500, Helena Mitasova wrote:
> > Markus
> >
> > I meant d.leg.thin or d.legend, because d.leg.thin helps when you have
> > continuous data (in fact Bill did it when I started to do more continuous
> > data stuff with s.surf.tps and r.flow) but it does not resolve the problem
> > of placing the legends for category data and for continuous data it is
> > useless for data with non-linear values (such as flowaccumulation - just
> > try to draw a legend for the dsout output of r.flow). All of this was
> > solved with legends for SG3d (you can chose discrete or continuous, you
> > can place the legend with mouse both for discrete and continous and you
> > can define the values for which the color is shown for both discrete and
> > continuous and you could even chose the size of the font - the
> > capabilities are described on the web), however nobody seems to be
> > interested to include it into grass5 although that means that for many
> > maps you cannot really display your data in a meaningful way.
>
> I fully agree - the legends problem is severe.
> For the others: The SG3d code is here:
>  grass_exp/src.contrib/GMSL/SG3d
>  grass_exp/src.contrib/GMSL/sg4d
>
> -> experimental tree, not stable branch.
>
> Especially sg4d is great software, see
> http://www2.gis.uiuc.edu:2280/modviz/viz/vol1.html
>
> > I am writing
> > this long mail to urge you to put the legends issue on top of the agenda
> > for the developers meeting, it shoudl take an experienced programer few
> > days to implement it when using Bill's SG3d code.
> [...]
> > People just now expect to get the legend along
> > with their map as ArcView does it and parctiacally all of on-line mapping
> > services do too. So not being able to get the legend when looking at your
> > map is a big turn off for people who may want to use GRASS.
>
> ... very true...
>
> > For spearfish when you do the legend for geology you get either huge
> > squares and letters, or if you run it as if it was a continuous map so
> > that you can get the legend smaller then you do not get the cat labels for
> > all colors. The easy workaround how to get the legend along the map is to
> > stretch the window to make space for it (rather than using frames which is
> > how you are supposed to do it, but it is really inpractical - it is used
> > in d.display).
> [...]
> > Helena
>
> All open for comments...
>
> Markus
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