Hello Giovanni and T. Gray,Thanks for the suggestions. When I loaded the plugins and went to raster>extraction>contour and browsed then entered the file it said it wasn't recognized as a supported file type. I think it wants tiffs. Is there by chance a way to convert txt to tiff or raster that anyone knows of? That would seem to be an ideal solution.again, thanks to all who have given me help in the past,J.R. h
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