GPS Data and Google Earth
All kinds of great stuff is available for Google Earth, case in point, how about some do it yourself mapping. GPS Visualizer allows you to input GPS data, street addresses or simple coordinates and it will output a picture of the trip. So, for example, you could input your drive to the beach next summer and print it out, or say you are going on a big trip, you can plot each point and see where you have been. This is pretty cool. First, as always, you need Google Earth, click this link, , to download it, it is part of the Google Pack containing all kinds of great and free software, download it all, or just Google Earth if you’d like. Then, click this link to the Google Earth KML file, and you are ready to start. This would be great for geocachers, they could plot all of the spots they have visited and print out a map of it, might be a good idea for a little surprise if you know someone who is.
GPS Visualizer is a free, easy-to-use online utility that creates maps and profiles from GPS data (tracks and waypoints), 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, geotagging, etc.).
GPS Visualizer can read data files from many different sources, including but not limited to: GPX, OziExplorer, Geocaching.com (.loc), IGC sailplane logs, Garmin Forerunner (.xml/.hst), Timex Trainer (v1.3+), Cetus GPS, PathAway, cotoGPS, CompeGPS, TomTom (.pgl), IGN Rando (.rdn), Emtac Trine, Suunto X9/X9i (.sdf), NetStumbler/WiFiFoFum, and of course tab-delimited or comma-separated text.
GPS Visualizer can draw maps in SVG, JPEG/PNG, and Google Maps format, and can also create map overlays and KML files for Google Earth. For non-Google maps, JPEGs are easier to deal with, but SVGs are interactive — to view them, make sure you’ve installed Adobe’s free SVG Viewer plug-in. Source: GPS Visualizer
Here is the link to some more Google Earth Layers.