Acknowledgments

Design Work

Gaia GPS (and this website) were designed by Kim Rullo. The sound effects for Gaia GPS were designed by her husband, Dave Rullo.

Maps and Data

Cloudmade (OSM) - Gaia GPS includes international roadmaps produced by Cloudmade, which use data from OpenStreetMap.org.

GeoNames.org - Some of the waypoint data on Gaia GPS is provided by GeoNames.org.

USGS - Topo maps and some of the waypoint data on Gaia GPS is also provided by The United States Geographical Survey (USGS).

Technology

Kevin Lacker's Kalman Filter - Underneath the hood, Gaia GPS uses a "Kalman Filter" to get more accuracy from the iPhone GPS. The Kalman Filter code was written by Kevin Lacker, a technical advisor to the Gaia GPS team, and engineer at Google. The Kalman Filter code is now open source and available for anyone to use. You can read more about Kalman Filters on Wikipedia, and you can download the source code on GitHub.

EveryTrail.com - Gaia GPS lets you export tracks and photos to EveryTrail.com to create visual interactive trip reports.

Route-Me - Gaia GPS uses the route-me map framework to display maps on the app. This open source software can be downloaded here.

Ramer-Douglas-Peuker Algorithm - Gaia GPS implements the Ramer-Douglas-Peucker algorithm. This algorithm removes points that don't matter from GPS tracks, which is important to keep down the size of file exports and to make displaying long lines on the map possible.