This chapter focuses on raster functions that take more than one spatial object. We'll look at raster aggregation functions such as ST_Union. As well as ST_MapAlgebr, ST_Intersection and map algebra family of functions.
First draft completed and on MEAP
Stay tuned for our next book pgRouting: A Practical Guide published by Locate Press due out 1st or 2nd quarter 2017. Preview drafts available. Content is now feature complete.
© Leo Hsu and Regina Obe 2014