Hi again it seems that the requirements are related (although not 100% similar) to this other open (and assigned) ticket: http://hub.qgis.org/issues/14449
I really hope to see this very needed feature in a coming version of QGIS and happy to help wherever I can! Cheers Stéphane Le mardi 10 janvier 2017, Stéphane Henriod <[email protected]> a écrit : > Hi > > let me move here a request that has been shortly discussed on the > user-mailing list: > http://lists.osgeo.org/pipermail/qgis-user/2017-January/038793.html > http://lists.osgeo.org/pipermail/qgis-user/2017-January/038795.html > http://lists.osgeo.org/pipermail/qgis-user/2017-January/038801.html > > and for which a ticket is open: > http://hub.qgis.org/issues/14845 > > I was said that some work has been done in this direction for 3.0 but I > don't know if it completely covers the feature request > > ---------------------- > > When styling a discrete or boolean raster, there seems to be no direct > method, only a few workarounds. The feature I dream of would do the > following: > > - A new render type "Discrete raster" > - One button allows to fetch all unique values form the raster (with a > warning message if there are more than XXX unique values) > - A color ramp is applied by default > - I can multi-select values and apply them the same style and / or the > same label > - I can remove values. The pixels with those values will simply not be > displayed > - I can save my color map and load an existing color map > > So pretty much like the ArcGIS implementation: > http://resources.arcgis.com/en/help/main/10.1/index.html#/ > representing_unique_categories_such_as_land_use/009t00000074000000/ > > The current limitations I see (in 2.14): > > - The discrete values must be entered manually, which is a pain for a > raster with many unique values (or if I don't know in advance what all > values are) > - If I click on *Classify*, QGIS will choose X values (based on the > number of classes and the classification method (continuous or equal > interval)), which no longer match the "exact" values of my raster. It > doesn't really make sense to classify a discrete rendering > - Although it is currently possible to style discrete rasters, the > procedure is not really intuitive for beginners > > ---------------------- > > Is this a feature that is envisioned for 3.0? Is there anything I can do > to support it? (except coding it myself, since I don't have the skills for > that...) > > Thanks a lot in advance > > Cheers > > Stéphane > > -- “When you travel, remember that a foreign country is not designed to make you comfortable. It is designed to make its own people comfortable." -- Clifton Fadiman
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