Hello all, I've noticed what I think may be a bug with gdal_translate, just looking for further information before deciding whether to report it.
In version 1.11.4 and earlier, using the -projwin tag to subset a raster produces an output whose cell alignment and content matches the source dataset - it just grabs any cells that intersect the box and writes them to the output. In v2.1.0 (at least in a Windows environment), this no longer occurs. The output raster is distorted to match the exact extent of the -projwin coordinates. No resampling is involved, but the cell origins shift, and the cell sizes are either shrunk or stretched slightly to conform to the projwin box. This is a substantial change in behaviour which doesn't appear to have been documented. >From my point of view, its an unwelcome change. I've been using gdal_translate with -projwin and vsicurl to clip out sections of large national datasets without having to download the whole file first, and without needing to know things like the source dataset origin, cellsize etc in order to ensure output aligns with input. I need each dataset I clip out to 'stack' properly, and to represent an unaltered subset of the source data. Please let me know if this is a true bug or just an undocumented change, and/or if there's a better alternative command to use. Regards, Lauren O'Brien
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