PostGIS in Action (3rd)
Where the adventure begins

PostGIS in Action: (ed. #3) Chapter 7 - Raster Functions

PostGIS In Action 3rd Edition Chapters    PostGIS In Action 2nd Edition Chapters    1st Edition Chapters
Download chapter code and data

  • Raster Accessors
  • Raster constructors
  • Raster Output functions
  • Polygonizing rasters

Although the raster type is vastly different in makeup from the geometry type, in PostGIS you’ll find the two have a very fluid relationship. In this chapter we'll mostly focus on raster functions that take as input a single raster or a geometry and output a scalar value, another raster or another geometry. In chapter 9 and 12 we'll explore interaction between raster and geometry in more detail when we explore the spatial relationships supported between the two and how leveraging these relationships makes it easy to do statistics on bounded geographic regions, clip rasters with geometries, and create hybrid rasters by overlaying several rasters.

Save 40% off on Third Edition of PostGIS In Action and other Manning published books Offer ends August 19th, 2022
PostGIS in Action,3rd edition pgRouting: a Practical Guide SQL In a Nutshell, 4th Edition