[QGIS-Developer] QGIS does not display raster maps from a GRASS mapset
pedrongvenancio at gmail.com
Thu Jan 10 11:09:03 PST 2019
>From your report, it seems that the data type has some influence in this
I'm forwarding this thread to developer mailing list, as it seems more
Na(o) qui, 10/01/2019, 16:58, Veronica Andreo <veroandreo at gmail.com>
> Hi Pedro and all,
> Many thanks for your answers :)
> El jue., 10 ene. 2019 a las 16:15, Pedro Venâncio (<
> pedrongvenancio at gmail.com>) escribió:
>> Hi Veronica,
>> This happens also in Windows platforms.
>> But if I open the raster layer properties and just do Ok, QGIS assumes a
>> default color ramp and the raster shows up (see the attached gif). Can you
>> confirm this also in Linux?
> Yes, same behaviour in Linux with North Carolina sample data set; if I
> open the raster properties and click ok then, the map is displayed,
> otherwise invisible.
> If I try with raster maps from any other mapset (modis ndvi products or
> landsat images), the trick does not work anymore and min and max are always
> the same no matter which map i try: Min 1.79769e+308, Max -1.79769e+308
> (that's the order, I double checked).
> So, it seems that QGIS 3.x is not interpreting GRASS color tables by
> Seems so... nor the statistics of raster maps. And no error reported
> For the case of nc_climate location , on the other hand, some stats
> seems to be recognized, but the map is not displayed following your trick
> nor trying to classify and then hitting OK.
> In QGIS 2.18.27, raster layers from GRASS Mapsets work without problems.
>> I don't know if it is somehow related, but using GRASS algorithms from
>> QGIS Processing, when the outputs are rasters, the error message 6 from
>> gdal is showed:
>> ERROR 6: SetColorTable() only supported for Byte or UInt16 bands in TIFF
> I'll test and let you know
> If you confirm this behaviour, please open a ticket at
>> https://issues.qgis.org/projects/qgis/issues. Or let me know, and I will
>> open it ASAP.
>> Thanks to you,
> Veronica Andreo <veroandreo at gmail.com> escreveu no dia terça, 8/01/2019
>> à(s) 14:49:
>>> I'm trying to display a raster map I have in a GRASS mapset in QGIS
>>> interface and it is not rendered, indeed it is loaded but invisible. It
>>> seems QGIS recognizes the color palette from GRASS and all but the raster
>>> map is not displayed (vector maps are displayed correctly though). I tried
>>> with other raster maps from the same mapset, changing color palette, but
>>> nothing happens either, map is not displayed. I use QGIS 3.5 and GRASS GIS
>>> 7.4 in a fedora 28 box.
>>> Any ideas?
>>> Thanks in advance,
>>> ps: See a screenshot here:
>>> (otherwise my post does not go through)
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