Re: [gdal-dev] GTI datasets: overview usage question

2024-07-22 Thread thomas bonfort via gdal-dev
Merci Even, I can confirm that the workaround you suggested works correctly. >From the performance I was getting beforehand, I strongly believe that the mixup happening on the overview levels was causing my hat/lr dataset to never be used at all. Thank you for the quick response, Thomas On Mon, Ju

Re: [gdal-dev] GTI datasets: overview usage question

2024-07-22 Thread Even Rouault via gdal-dev
Salut Thomas, There were actually 2 issues: - contrary to what the documentation stated, OVERVIEW_0_ metadata items were simply ignored, hence you only got overviews starting at the 1/4 reduction - and the documentation also lied when implying that it would automatically add overviews o

[gdal-dev] GTI datasets: overview usage question

2024-07-22 Thread thomas bonfort via gdal-dev
Hi list, I'm experimenting with the GTI driver and hitting an issue when trying to add overviews. I'm compiling a large number of adjacent non-overlapping tiles, each of which has is own bundled overviews: gdalinfo /*snip*/tile-1377-471.tif Size is 32768, 32768 Origin = (3.057607090103000,48.4207