On Sat, 9 Jun 2018 at 06:25, C Hamilton <[email protected]> wrote: > > OS: Windows 7 > QGIS 3.0.3 > > I have encountered several issues with the Hillshade algorithm in QGIS 3. > > 1. It is much slower that the QGIS 2 hillshade perhaps as much as 10x slower. > This is a problem because I process very large images. 60,000 x 80,000 pixels > or greater. I eventually killed the process and went back to QGIS 2 to > complete the job. > > 2. I tried using Multidirectional shading and received an error. This is > basically the command issued. > > gdaldem hillshade input.tif output.tif -of GTiff -b 1 -z 1.0 -s 1.0 -az 315.0 > -alt 45.0 -multidirectional
Can you post the command created in QGIS 2.18 for comparison? > I get the gdal error "ERROR 6: -multidirectional and -az cannot be used > together". If multidirectional is enabled then you cannot add the -az > parameter. If have tried running the same command in the command line and > removed the -az and it worked fine. Confirmed, thanks - fixed by https://github.com/qgis/QGIS/pull/7209 and unit tests added. Nyall _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
