Just some interesting pages that I saw on the web…
Performing Line of Sight analysis from PostGIS
Map generalisation (coastlines) and ray tracing
Powerful technology for accelerated pre-rendering of large maps
MapProxy is an open source proxy for geospatial data. It caches, accelerates and transforms data from existing map services and serves any desktop or web GIS client.
Vectorize raster maps including OCR of text
This project aims to automate a manual process: geographic polygon and attribute data extraction from maps including those from insurance atlases published in the 19th and early 20th centuries.