cl-geo is used by the En Route public transit trip planner, which powers En Route Spokane.
ASDF-install package (obsolete) http://surejourney.com/software/cl-geo/cl-geo-0.2.tar.gz
cl-geo
cl-geo is a geospatial library, providing a set of geographic data structures and operations. Though it's not a full GIS system, it's a simple set of tools for GIS applications.