Libraries & Services for Outdoor Pursuits Mashups
Bill Chadwick, of Where is the Path? fame, has produced an excellent website of libraries and services for those who are keen on creating outdoor pursuits mashups. The site includes a number of working examples of the libraries and services mashed-up with Google Maps.
Another great example on Bill's site is a Google Map mashed-up with a Java Script Douglas-Peuker algorithm. The algorithm reduces the points in a GPX trail so that the mapped polylines load much more quickly. Anyone who wants to create a map mashup that plots GPX trails should definitely check this out.