colorcolor rampqgis
This is a real basic question, but I can't seem to find it. How do I add a color ramp in QGIS? I noticed that has different applications you can add to QGIS (like RdYlGn, GnYlRd, cpt-city, etc…) but I didn't find those in the plug-ins manager window. Could someone explain what are the main difference between those and How to install these add-ons?
I am using 2.14.0 on Windows 10.
This feature has been implemented in QGIS 2.2 (release log). It's the checkbox right next to the color ramp:
I can't help on the details of QML and how to make colourmaps in QGIS, but I can give some info on the cpt-city gradients --- the "height information" is contained only in the CPT files, the values in the SVG files are normalised to be in the range from 0 -- 1. This is required by the SVG standard (and reflects the "graphic design" nature of SVG gradients). The CPT format is rather simple
z0 r g b z1 r g b
z1 r g b z2 r g b
:
so you should be able to extract the values fairly easily (if tediously).
Some time ago, Etienne Tourigny created a "Color Ramp Manager" plugin for QGIS which contains a lot of cpt-city gradients, perhaps you could try that route first?
Best Answer
In the menu
Settings - Style Manageryou can see the tag "Color ramp".By clicking on the green plus you can add manually some color ramps or choose the
cpt-cityaddon the allows you to choose between a lot of different color ramps.Once you have defined your color-ramp (manually or by
cpt-city) you can find it in each style menu (Raster and Vector).