[Qgis-developer] Raster colours

[Etienne Tourigny]

On Thu, Jul 26, 2012 at 4:25 PM, Giovanni Manghi
<giovanni.manghi at faunalia.pt> wrote:
> Hi Etienne,
>
>
>> In this case, I think we should add several ramps that, although useful
>> for both, are really necessary for raster (e.g. DTM). See 1-band plugin
>> for a very nice set of ramps, and classification methods.
>> From the user point of view, having the same colours available would be
>> a serious advantage
>
>
> I agree, most color ramps available for vectors would not be very useful
> to theme raster maps. It is really needed a set of specific color ramps,
> as in the already cited 1-band raster plugin, that includes also the
> ramps available in GRASS and many (but maybe not all) the ramps
> available here
>
> http://soliton.vm.bytemark.co.uk/pub/cpt-city/

That site lists several formats - which one could we use easily? SVG
might be the obvious choice.

http://soliton.vm.bytemark.co.uk/pub/cpt-city/notes/formats.html
http://soliton.vm.bytemark.co.uk/pub/cpt-city/notes/software.html

There are ready-to use zip as well as .deb files, which contain .xml
files for each collection
We could present available ramps in a tree-based interface, based on
the xml files.

We might be able to import the entire dataset inside qgis eventually,
but as its quite large (4MB), it could be better to add it as an
optional dependency (has .deb and .zip packages) - either a package or
have the use specify the directory where the zip was unpacked.

Etienne

>
> Adding this functionality would fix a long standing issue
>
> http://hub.qgis.org/issues/782
>
> a very painful issue indeed for who works with raster data and need to
> produce thematic maps.
>
> Thanks in advance
>
> -- Giovanni --
>