On Thu, Aug 23, 2012 at 9:30 AM, Radim Blazek <[email protected]> wrote: > On Thu, Aug 23, 2012 at 2:08 PM, Etienne Tourigny > <[email protected]> wrote: >> I also find it puzzling that the data type changes (say from byte to >> int). I understand that it is needed to have a nodata value when none >> is given, but it would be nice to hide this from the user as well. > > User should not know about it. srcDataType() is used in metadata. Is > there another place where user can see the internal type used?
osrry, you are right - the only thing that shows up in the properties is the nodata value, type remains the same > > More challenging issue is how to handle data types in analytical tools > (map calculator for example) reading from data providers. For example > int+int should be int. The tool should use srcDataType(), but it would > not work well if another interface (which changes data type) was > plugged after the provider. > > Radim > >> Etienne >> >> On Thu, Aug 23, 2012 at 9:05 AM, Radim Blazek <[email protected]> wrote: >>> On Wed, Aug 22, 2012 at 6:13 PM, Etienne Tourigny >>> <[email protected]> wrote: >>>> On Wed, Aug 22, 2012 at 1:11 PM, Bob and Deb <[email protected]> wrote: >>>>> I've seen nodata with huge float32 values. Unfortunately they are >>>>> rendered >>>>> in qgis and I can not make them transparent by adding the value to the >>>>> transparency list. >>>> >>>> that's because gdal provider chooses a nodata value that is out of the >>>> range of "real" values, when file does not contain a nodata value. >>> >>> Yes. I agree that it is confusing for users. I would like to hide from >>> users those internal nodata values, removing it from the transparency >>> list is one step. >>> >>> Radim >>> >>>>> On Aug 22, 2012 8:56 AM, "Giovanni Manghi" <[email protected]> >>>>> wrote: >>>>>> >>>>>> It isn't the only odd thing/bug with nulls and transparency. For example >>>>>> not always nulls are rendered transparent and when you try to add them to >>>>>> the transparency list the entry is added as 0 instead. >>>>>> >>>>>> On Aug 22, 2012 4:49 PM, "Radim Blazek" <[email protected]> wrote: >>>>>> > >>>>>> > Hi, >>>>>> > does anybody know why raster no data value is automatically added to >>>>>> > transparency list in properties dialog? It makes no sense IMO. No data >>>>>> > values are always rendered as transparent, no need to define them also >>>>>> > in transparent list. >>>>>> > >>>>>> > Radim >>>>>> > _______________________________________________ >>>>>> > Qgis-developer mailing list >>>>>> > [email protected] >>>>>> > http://lists.osgeo.org/mailman/listinfo/qgis-developer >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Qgis-developer mailing list >>>>>> [email protected] >>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer >>>>>> >>>>> >>>>> _______________________________________________ >>>>> Qgis-developer mailing list >>>>> [email protected] >>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer >>>>> >>>> _______________________________________________ >>>> Qgis-developer mailing list >>>> [email protected] >>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
