[gdal-announce] QGIS Loads Black Screen For PostGIS Out-Db Raster Data

Osahon Oduware osahon.gis at gmail.com
Tue Apr 25 04:38:58 PDT 2017

Hi All,

I have an out-db raster on PostGIS which I tried to load in QGIS (v
2.14.12-Essen) utilizing the DB Manager to establish a connection. I could
view the raster table, but when I try to "Add to canvas" it displays a
black screen instead of the raster image.

This raster file exist on the filesystem and when it is loaded directly
into QGIS it displays the image (aerial photo). Also, when the same file is
stored in PostGIS as a raster (IN-DB), it can be viewed in QGIS (using the
DB Manager tool). However, when I link the same file as an OUT-DB raster in
PostGIS (in this case only the metadata of the raster and the filepath to
the raster file is stored), an attempt to view it in QGIS (using the DB
Manager tool) results in a black image being displayed instead of the
aerial photo.

I have been told it has to do with QGIS-GDAL support for PostGIS Out-DB
rasters. I would be glad if someone could help me resolve this.
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