Selected GPS-Related Websites

edcsns17.cr.usgs.gov/EarthExplorer       link to online sales for USGS map, aerial photographs, and digital datasets

geonames.usgs.gov/index.html     the USGS Geographic Names Information System (GNIS) site, all named features, and coordinates, on USGS maps are here in a searchable database

gps.faa.gov/programs/index.htm      information about WAAS

rmmcweb.cr.usgs.gov/software     download the USGS coordinate conversion software, TRIPAC(Windows) or GEOCON (DOS)

www.cellspark.com/UTM.html    a lat/long converter, use this or find a better one on the ‘net or use TRIPAC (see above)

www.confluence.org     the Confluence Project, fun for the true GPS addicts

www.dmap.co.uk/utmworld.htm     information about UTM

www.flourish.org/upsidedownmap     a slightly different look at the world

www.garmin.com    new products, user stories, go here to download the latest software for your GPS, but be sure to back up your GPS data first (see www.gpsu.co.uk  below for the software)

www.geocaching.com    great website for geo-cache activities, including many in Colorado

www.geolab.nrcan.gc.ca/geomag/northpole_e.shtml     North Magnetic Pole data and diagrams

www.gpsdrawing.com    GPS drawings, it helps to be British

www.gpsnow.com    check the prices here before you buy somewhere else; compare models, and download owner’s manuals

www.gpsoutfitters.com/Vortech%20System.html    if you use your GPS inside your car or boat and have signal problems, get this way cool reradiating system.  Boosts signal strength inside car so you get improved GPS lock anywhere in the car; extra cool because you don’t need the GPS antenna hookup lacking in less-expensive GPS units

www.gpsu.co.uk    freeware utility for downloading and uploading GPS data to personal computer, looks like the best one so far and it’s free ($40.00 for full registration), works with the new Garmin 76S models

www.magellangps.com/en     the Magellan home page

www.mapblast.com    type in an address and get a map,  used to provide lat/long coordinates but no longer??

www.ngs.noaa.gov     go to the geodetic tool kit link at the top of the web page for magnetic declination calculators, other useful software, information on geoids, ellipsoids

www.noaa.gov    marine chart source

www.nps.gov/prwi/readutm.htm    a short tutorial on UTM  (Universal Transverse Mercator)

www.topozone.com    examine any of the USGS topographic maps for free, look up locations, map names

www.usgs.gov   USGS home page, links to various USGS departments and services