Raster in GeoPackage - Converts to RGB about project-support-wp8 HOT 4 CLOSED

Dear Edd,

For the Geoera project Hotlime a colleague from GSI was trying to convert rasters to GeoPackage (see below – for some reason it converts unwantedly to RGB). We were looking for an instructions document supposedly at https://geoera-gip.github.io/documentation/data.html#providing-gis-data but not apparently no longer there.

My colleague Rob van Ede suggested that you know more about it? Hope you can shed some light.

Best regards,

Hans

from project-support-wp8.

Hi Hans,

Those docs were deprecated as we felt everything should live under the EGDI or MickA docs directly.

In the EGDI docs theres - http://egdi-public.gitlabpages.geus.dk/egdi-documentation/#/main-content/GeoPackageExamples

But this is more on vector data.

The GDAL docs https://gdal.org/drivers/raster/gpkg.html

“Various kind of input datasets can be converted to GeoPackage raster :

• Single band grey level
• Single band with R,G,B or R,G,B,A color table
• Two bands: first band with grey level, second band with alpha channel
• Three bands: Red, Green, Blue
• Four band: Red, Green, Blue, Alpha

GeoPackage rasters only support Byte data type.”

If that fits with your data in QGIS you should just be able to right click > “Export Data” and choose GeoPackage as the output format.

Cheers,

Edd

from project-support-wp8.

Upload of GeoTIFF should be possible (try to use a generic CRS like 4326) so I’d recommend trying that first.

from project-support-wp8.

Hi all,
If you are delivering raster data to EGDI you should deliver them as GeoTIFF if the dataset contains a single value like dept to aquifer. If your raster dataset contains several values like an annual value for a parameter you should deliver the data on the NetCDF format - see:
http://egdi-public.gitlabpages.geus.dk/egdi-documentation/#/main-content/SpatialData?id=gridded-data
The data should be delivered in EPSG:3034 - see:
http://egdi-public.gitlabpages.geus.dk/egdi-documentation/#/main-content/SpatialData?id=projections

from project-support-wp8.