The files currently included in the Utah Raster Toolkit distribution are: urt-3.0.tar.Z Toolkit source and manual pages. (700K, 1900K uncompressed) urt-doc.tar "Papers" describing the toolkit. (550K) urt-img.tar Sample images. (1800K) urt-3.0.patch1 The first patch file. Must be applied to the 3.0 distribution. urt-3.0.patch2.Z The second patch file. Must be applied after urt-3.0.patch1. The only files you need to build the toolkit are the first, plus any patches that apply to it. The first file is a compressed tar file. The next two are ordinary tar files because they compress only 5-10%, so it isn't really worth the CPU time. The patch files are either normal text files or compressed text files, depending on their size. You must use FTP's BINARY mode to properly copy the distribution. To unpack it, you can follow the following steps: cd (appropriate source directory) mkdir urt cd urt zcat urt-3.0.tar.Z | tar xfo - tar xfo urt-doc.tar tar xfo urt-img.tar patch -p -N