Main data page
The image files are huge. Check the files sizes to make sure that your browser got the complete file. If you don't want to download big files, you can buy the DVD for $50/county.
Okanogan* (two files)
Yakima (two files)
* Seven of the files are > 2 gigabytes. This can be troublesome. See Large Files below.
MrSID files can be viewed, and subsets can be written to image files with the free TatukGIS Viewer. See an example (with world file).
2147483647 is the largest value that can be expressed as a signed four-byte integer. When files get larger than this (2 gigabytes), things start getting weird. FAT filesystems (an old Windows format that you might still find on old systems, especially external drives) will fail. Internet explorer will stop exploring. Many programs (.e.g. Arc/INFO workstation) will complain about pointers out of range. (Ask your grandpa about the 32K limit.) However, I am happy as a clam at high tide with huge files while using Windows XP, firefox, and ArcMap.
Most of these files are under two gigabytes, but ten are larger. Thanks to our server updates (Thank you, Ed.), you can now download these huge files in one piece.
Webmaster: Harvey Greenberg