Pleiades Software Components
The GeoJSON format is employed internally and in JSON representations of Locations and Places.
We've used OpenLayers in the past (and have contributed code and ideas to the project), we use Google Maps currently, and we may return to OpenLayers. We've tried to do mapping in a declarative style rather than an procedural style, designing KML representations of places that allow us to switch javascript APIs easily.
GeoJSON, the data format, has some roots in the Pleiades project and Sean was one of the authors of the specification.
Shapely is a direct product of Pleiades. It enjoys crucial contributions from other programmers.
Rtree is also a direct product of Pleiades. It is now largely the work of open source LiDAR software developer, Howard Butler (of libLAS), and bio-informatics programmer, Brent Pederson (University of California, Berkeley).
We're very proud to be sharing code and formats across institutions and application domains.