Re: [gdal-dev] Append new data to GeoPackege raster table as overview
Even Rouault-2 wrote > The following works: > > gdal_translate Taustakartta_4milj.png test.gpkg -of gpkg -a_srs epsg:3067 > -expand rgba > gdal_translate Taustakartta_8milj.png Taustakartta_8milj_rgba.tif -expand > rgba > gdalwarp Taustakartta_8milj_rgba.tif test.gpkg -doo ZOOM_LEVEL=2 > > Expension to RGBA wouldn't be strictly needed in theory since your 2 > rasters have the same palette, > but in practice you have to do it. > > Even Oh yeah, naturally by polishing with gdalwarp and -doo. I would almost say "supernaturally". Thanks, I will remember this, and if I won't I can find it by searching "me+asking+something+tricky". -Jukka- -- View this message in context: http://osgeo-org.1560.x6.nabble.com/gdal-dev-Append-new-data-to-GeoPackege-raster-table-as-overview-tp5298214p5298218.html Sent from the GDAL - Dev mailing list archive at Nabble.com. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Append new data to GeoPackege raster table as overview
On jeudi 1 décembre 2016 11:45:43 CET Rahkonen Jukka (MML) wrote: > Hi, > > Let's say that I have these raster maps with 2048 m and 1024 m pixel sizes > http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/ > etrs89/png/Taustakartta_8milj.png > http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m > /etrs89/png/Taustakartta_8milj.pgw > > http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/ > etrs89/png/Taustakartta_4milj.png > http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m > /etrs89/png/Taustakartta_4milj.pgw > > Converting the 8milj.png into GeoPackage raster table is easy > > gdal_translate -of gpkg -a_srs epsg:3067 Taustakartta_8milj.png > overview.gpkg > > Image goes to zoom level 2 as reported by gdalinfo: > Metadata: > IDENTIFIER=overview > ZOOM_LEVEL=2 > > But now the hard part: I would like to append the second image 4milj.png to > the same layer "overview" as ZOOM_LEVEL=3 because that map is designed for > that resolution. Is it possible to do that by using some parameters of the > driver http://www.gdal.org/drv_geopackage_raster.html or with some clever > trick? The following works: gdal_translate Taustakartta_4milj.png test.gpkg -of gpkg -a_srs epsg:3067 -expand rgba gdal_translate Taustakartta_8milj.png Taustakartta_8milj_rgba.tif -expand rgba gdalwarp Taustakartta_8milj_rgba.tif test.gpkg -doo ZOOM_LEVEL=2 Expension to RGBA wouldn't be strictly needed in theory since your 2 rasters have the same palette, but in practice you have to do it. Even -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Append new data to GeoPackege raster table as overview
Hi, Let's say that I have these raster maps with 2048 m and 1024 m pixel sizes http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.png http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_8m/2048m/etrs89/png/Taustakartta_8milj.pgw http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.png http://kartat.kapsi.fi/files/taustakarttasarja_jhs180/taustakartta_4m/1024m/etrs89/png/Taustakartta_4milj.pgw Converting the 8milj.png into GeoPackage raster table is easy gdal_translate -of gpkg -a_srs epsg:3067 Taustakartta_8milj.png overview.gpkg Image goes to zoom level 2 as reported by gdalinfo: Metadata: IDENTIFIER=overview ZOOM_LEVEL=2 But now the hard part: I would like to append the second image 4milj.png to the same layer "overview" as ZOOM_LEVEL=3 because that map is designed for that resolution. Is it possible to do that by using some parameters of the driver http://www.gdal.org/drv_geopackage_raster.html or with some clever trick? -Jukka Rahkonen- ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
