Resources on Global Navigation Satellite System
Links and tools about all that concerns Global Navigation Satellite Systems and Global Positioning System.
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GPSBabel converts waypoints, tracks, and routes between popular GPS receivers and mapping programs. It also has powerful manipulation tools for such data.
uTrack is online utility for generating track reports from *.GPX files. The track is shown on Google Maps or AMaps, there are calculated some parameters and showed some profiles of the track on report too. It is possible to export report into *.PDF file.
GPS Visualizer is a free, easy-to-use online utility that creates maps and profiles from GPS data (tracks and waypoints, including GPX files), driving routes, street addresses, or simple coordinates. Use it to see where you've been, plan where you're going, or visualize geographic data (business locations, scientific observations, events, customers, real estate, geotagged photos, "GPS drawing," etc.).
Comparetracks is a browser-based program where you can upload your gps-tracks and compare them with others on the best maps available. You can line-up all tracks at any point in the course, and with the advanced "Time Ahead" function, you get an unique overview of where you gained/lost to your friends.