NOTE: Code commits are FROZEN on SourceForge: New code is now at <http://github.com/Xastir/Xastir>. Real-time tracking & messaging of stations via radio/internet APRS data streams, w/125 map formats supported. Linux/FreeBSD/Solaris/MacOSX/Windows in any of 7 languages. Can also be used for mobile mapping w/GPS. MAILING LISTS ARE AT: PROJECT->WEB SITE.
GeoQuadTree is an open format for storing georeferenced images on a filesystem. It is based on image tiles, compressed in PNG format, and organised in a hierarchical structure of folders. This project also includes software to server the images.