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I have some raster data (ASCII grid files) that use a custom rotated-pole projection, that I'd like to reproject into something more useful, such as lon/lat WGS84. A description of the grid projection is here, but I can't see how I can use this to create a projection string for use in GIS.

This SE question seems to discuss using rotated pole data, but I can't work out how to apply it to my problem: Lon/lat transformation

I found a thread here asking exactly same question (about the same dataset), but with no replies:

The header of the ASCII grid data looks like this:

ncols 39
nrows 52
xllcorner -0.50
yllcorner -0.50
cellsize 1.00
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