README.TXT FILE FOR DIGITAL MAP TRANSFER This FTP directory contains digital maps of the Puget Sound aeromagnetic survey. Individual maps are available for the entire aeromagnetic survey and for all 1:100,000-scale quadrangles covered by the survey. The maps show the intensity of the magnetic field (expressed in nanotesla) as colored shaded-relief. Warm colors indicate anomalously high magnetic intensity; cool colors anomalously low intensity. The maps also show coastlines, highways, major roads, cities, towns, and major inland water bodies. Maps are in Portable Document Format (PDF) and can be viewed and printed using Adobe Acrobat Reader. Acrobat Reader is a free program available from Adobe Systems Incorporated (http://www.adobe.com) and commonly available on a variety of computer platforms. To speed file transfers, all maps have additionally been compressed into the public-domain "gzip" format (as indicated by the suffix .gx). Gzip format is commonly used on PC DOS, PC Windows, Macintosh, and Unix platforms. Additional information can be found at the following websites: http://www.maths.lancs.ac.uk/~smithdm1/GNU/GNUWeb/gzip.html (unix and PC DOS versions) http://www.winzip.com/ (PC windows version) http://www.1source.com/tools/compress.html (contains link to download Mac gzip) The following maps are available in this directory: Bellingham (bellingham.pdf.gz) Centralia (centralia.pdf.gz) Mount Olympus (mount_olympus.pdf.gz) Mt. Baker (baker.pdf.gz) Port Angeles (port_angeles.pdf.gz) Port Townsend (port_townsend.pdf.gz) Roche Harbor (roche_harbor.pdf.gz) Sauk River (sauk_river.pdf.gz) Seattle (seattle.pdf.gz) Shelton (shelton.pdf.gz) Skykomish River (skykomish_river.pdf.gz) Snoqualmie Pass (snoqualmie_pass.pdf.gz) Tacoma (tacoma.pdf.gz) Entire survey (all.pdf.gz)