How does GPS work? "Global Positioning System satellites transmit signals to equipment on the ground. GPS receivers passively receive satellite signals; they do not transmit...

The Global Positioning System Global Positioning System Overview.

GPS satellites in orbit Simulation of GPS and GLONASS satellites.

GPS Image Collection


Daily Wireless, the Motherload of wireless compilations.

GPS User Magazine

GPS Information Net. Excellent page of links to GPS technology and related. Pragmatic, extensive information.

GPS Receiver Information, Software, and Hardware Reviews of Garmin, Lowrance, and Magellan Totally insane site with too many links to be comprehended.

Sam Wormley's Global Positioning System (GPS) Resources at ISU

GARMIN: Communication Protocol Interface Specifications For advanced users desiring to develop their own custom software applications for communicating with GARMIN GPS products, this document describes the serial communication protocol required for transferring Waypoints, Routes, and Track Log information to and from GARMIN GPS products.

The GPS Resource Library This is a page of links containing information about the Global Positioning System (GPS) and handheld GPS units. There are links to other GPS information sites, online Internet Mapping Programs, GIS (Geographic Information Services), Grid Overlays, DGPS, GPS resellers, GPS manufacturers, Radio modems for GPS use, and the Year 2000 (Non) Problem.

Hacking Garmin eTrex GPS receiver How to build your own cable and power supply.

Map Maker You can use this page to create a USGS Photo Image or USGS Topographic map (USA only!).

Google Groups: View Thread "GPS Tutorials and FAQs .." A Google Groups search for GPS Tutorials and FAQs. <


NMEA NMEA is a standard protocol, used by GPS receivers to transmit data. NMEA sentences are strings that contain the data you will need to parse to get Latitude and Longitude.

Common GPS NMEA sentences

NMEA data

Google Search: garmin etrex serial no data Use hyperterminal to export NMEA data from GPS unit to the PC.

GPS SOFTWARE (freeware and shareware)

GPS Software from Sunninghill Run GPSS on your PC and it will give impressive in-car navigation and remote tracking demonstrations. Run on a Laptop with a GPS, and this same GPS Software will work "for real".

Logiciel pour planeurs is software for glider pilots. It allows among other things map printing with useful flying information.

Gardown is Simple but effective MS-DOS program that can download and upload Waypoints, Track data, and Route data to a garmin GPS. Gardown is the latest version and now can also montor NMEA 183 from a garmin or any GPS with NMEA 183 output.

VisualGPS incorporates many advanced features found in professional programs. Its sole purpose is to display graphically specific NMEA 0183 sentences and show the effects of selective availability (SA). # Windows 95/98, WinNT4.0 or higher.

gpstrans is a program which allows track, route, and waypoint data to be transferred to and from a Garmin GPS. It also supports Mayko mXmap formats which enable you to create a route using your 'favorite' map and load the data into the GPS. Tracks Linux.

Garble is a console program for downloading data (waypoints, proximity waypoints, tracks, and routes) from Garmin GPS receivers. Operating System POSIX.

WinCE GPS Software This page is a pointer to a collection of information on Pocket PC Navigation products.

GPS Utility is an easy-to-use application that provides management and manipulation of GPS information. You can use it to transfer data to/from a GPS receiver and store the data in PC files in one of several text formats. Win3.1, Win95, Win98, Win NT, WinME, WinXP and Win2000

GPS2PILOT2PC It was written to download trackdata from my Garmin GPS45 GPS-receiver via the Garmin-protocol to free its memory for new data. Program for use with the US-Robotics PalmPilot.

GPS (and related) Software for Linux I'm in the process of writing some GPS (and related) software for Linux. This is what I have written so far:

GPS TrackMaker If, for example, companies that manufacture GPS devices don't supply maps of waterfalls, parks, tracks or even of your neighborhood, you can create it in GPS TrackMaker®.

G7ToWin The program supports download (transfer from the GPS to the PC) of waypoints, track logs, routes, events (Lowrance/Eagle units only), and for those units which support it, downloading a copy of the current display as a Windows bitmap. Windows 9X/Windows NT 4.0/Win2K


Acer TravelMate C100 Tablet PC

PaceBlade Technology PaceBook

Tablet PC Talk has a fairly comprehensive comparison of most TabletPCs.

This report was compiled by Naomi Spellman, the project director for a site specific interactive narrative project in the spring of 2003 at
The Evergreen State College with the support of the Northwest Academic Computing Consortium - NWACC - and Motion Computing.