I am currently working on a driver for a proprietary format, which is being consumed by ArcGis via GDAL.
These grids sometimes has a rotation with a specified pivot point. I managed to get ArcGis to display the rotated grid by doing the following: poDS->dGeoTransform[0] = originX; poDS->dGeoTransform[1] = cos(rotation) * cellSizeX; poDS->dGeoTransform[2] = -sin(rotation) * cellSizeX; poDS->dGeoTransform[3] = originY; poDS->dGeoTransform[4] = sin(rotation) * cellSizeY; poDS->dGeoTransform[5] = cos(rotation) * cellSizeY; Rotation is in radians. It works, but there is one problem: I need to rotate the grid around the center of the corner cell (originX, originY), but ends up getting rotation around the corner of the cell/raster instead. There is a screenshot here, showing only the corner pixel. The topmost grid/pixel was translated using custom geotransform in ArcGis, the bottom one is the result of my GDAL rotation: The cyan dot shows the pivot point: http://i.stack.imgur.com/7HEvc.png Is there any way to express this translation using the geotransform matrix ?
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