Martin Ceperley wrote:
It appears that nearest neighbor is the only resampling
method in i.rectify, are there any methods or tricks for
getting better looking results rectifying bitmaps? Or other
programs or tools that do this?
yeah, check out i.warp from grass's wiki addons, which is a front-
end to gdalwarp which will let you chose the method, and is faster
too. the i.warp script embeds GCPs from GRASS's POINTS file into
a geotiff metadata with gdal_translate then does the work with
gdalwarp. (IIRC)
see gdalwarp help page at www.gdal.org
nearest-neighbor is required if input map was paletted instead of
RGB.
Hamish