Hi! Tried to load your rasterfile in 1.8 and current master and nodata is correctly identified as -99999 in both ..
But with one thing you are right .. It seems to get loaded differently .. while in 1.8 I get the min-max values right after loading i have to go into properties with master to change the classification .. But if you mean that I assume that is due to heavy changes in the way rasters are handled by qgis in master.. (Beside the fact that the GUI for that has changed a lot) As it is master and not any released version I think there will still be some changes and there might be probably errors right now .. So if you think you really found a bug .. just report it as a bug and we'll see how the developers handle it .. kind regards Werner On Tue, Aug 7, 2012 at 7:32 AM, skampus <stefano.cam...@regione.piemonte.it> wrote: > i'm trying to find the difference between raster management in qgis ver. 1.8 > and 1.9. but there are some features that i don't understand. > > as it has already been stated in other threads, qgis has some problems > (error ?) in treating the value "no data" in raster. > it makes some confusion in applying transparency to no data, and so the only > way I found to get around this problem is to reclassify the raster > immediately after a raster has been created (for example through the > application of raster operations). > Using the Sextante-saga reclassification module and immediately i convert no > data to -99999 value and this valued is suited for transparency. > Needless to say how much this is annoying but now it seems that between > version 1.8 and version 1.9 there is no continuity. > > I'll explain: Having dealt with a raster in version 1.8 as mentioned above, > I would expect to (not) see no data in the version 1.9. > instead it seems that the classification made with Ver. 18 is not > recognized by ver. 1.9 and so it begins again. > > is it so, or I'm missing something? > > s. > > ps: please open attached raster with 1.8 and 1.9 > 1.8: colormap, three classes > 1.9: singleband pseudocolor, three classes > please see, how "no data" in 1.9 don't disappear > http://osgeo-org.1560.n6.nabble.com/file/n4993536/OK_iso_2_50anos.tif > OK_iso_2_50anos.tif > > > > -- > View this message in context: > http://osgeo-org.1560.n6.nabble.com/raster-in-qgis-1-8-and-1-9-tp4993536.html > Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer