Re: [QGIS-Developer] Caching of raster images

You can also build your VRT using QGIS' processing toolbox. On Oct 5, 2017 7:26 PM, "Régis Haubourg" wrote: > GDAL is probably installed on your system, you need it for QGIS :) > > something like this should do the trick in a linux bash or from the > osgeo4w embedded shells (either windows or ms

Re: [QGIS-Developer] Caching of raster images

GDAL is probably installed on your system, you need it for QGIS :) something like this should do the trick in a linux bash or from the osgeo4w embedded shells (either windows or msys ) gdalbuildvrt all_ecw.vrt *.tiff -a_srs "EPSG:yourSridHere" See http://geoserver.geo-solutions.it/edu/en/raster_da

Re: [QGIS-Developer] Caching of raster images

I probably don't have the technical means to use that. On 06/10/17 01:12, Régis Haubourg wrote: here it is: http://www.gdal.org/gdal_vrttut.html you can assemble raster of vector files, apply filters, reprojections, build pyramids to avoid fetching the lowest resolution data. This is pretty

Re: [QGIS-Developer] Caching of raster images

here it is: http://www.gdal.org/gdal_vrttut.html you can assemble raster of vector files, apply filters, reprojections, build pyramids to avoid fetching the lowest resolution data. This is pretty efficient. Cheers Régis 2017-10-05 14:10 GMT+02:00 Patrick Dunford : > I don't know what this is. >

Re: [QGIS-Developer] Caching of raster images

I don't know what this is. On 06/10/17 01:08, Régis Haubourg wrote: Hi Patrick ,  did you consider using GDAL VRT to avoid opening so much files? In my experience, this works well. Régis 2017-10-05 13:48 GMT+02:00 Patrick Dunford >: Some time ago in a dis

Re: [QGIS-Developer] Caching of raster images

Hi Patrick , did you consider using GDAL VRT to avoid opening so much files? In my experience, this works well. Régis 2017-10-05 13:48 GMT+02:00 Patrick Dunford : > Some time ago in a discussion of a particular bug a contributor expressed > concern that the refresh of background rasters (aerial

[QGIS-Developer] Caching of raster images

Some time ago in a discussion of a particular bug a contributor expressed concern that the refresh of background rasters (aerial photography) in Windows was too slow. Maybe this is the reason that recent versions of master appear to be loading all of the background imagery into memory (I use a