= WKT Raster = 

Welcome to the '''WKT Raster''' project home page!


[wiki:WKTRaster WKT Raster] is an ongoing project aiming at developing '''raster support in PostGIS'''. It is a new project very different from the previous PGRaster project and also very different from [http://en.wikipedia.org/wiki/GeoRaster Oracle Spatial GeoRaster].

The goal of [wiki:WKTRaster WKT Raster] is to implement the RASTER type '''as much as possible like the GEOMETRY type''' is implemented in PostGIS and to offer '''a single set of overlay SQL functions''' (like ST_Intersects) operating '''seamlessly''' on vector and raster coverages.

== Specification ==

 * [http://www.cef-cfr.ca/index.php?n=Membres.PierreRacineWKTRasterSpecifications Working Specification]
 * [http://www.cef-cfr.ca/index.php?n=Membres.PierreRacineWKTRasterDocumentation Working Documentation] (very preliminary)
 * Original Project Presentation - rationale, examples and preliminary specifications: [http://www.cef-cfr.ca/uploads/Membres/WKTRasterSpecifications1.0.ppt PPT], [http://www.cef-cfr.ca/uploads/Membres/WKTRasterSpecifications1.0.pdf PDF] (v1.0)

For more details and examples of application:
 * Search for "WKT Raster" in the [http://postgis.refractions.net/pipermail/postgis-users/ PostGIS mailing list archive] or in [http://www.nabble.com/forum/Search.jtp?forum=1221&local=y&query=%22wkt+raster%22 Nabble]
 * Write to [http://www.cef-cfr.ca/index.php?n=Membres.PierreRacine Pierre Racine]

== Overview ==

 * '''is as simple as PostGIS...'''
  * one table = one raster coverage (like a vector coverage)
  * one row = one tile or one raster object (like a vector coverage where one row = one geometry)
  * only one new type: RASTER (like the PostGIS GEOMETRY type)
  * each raster tile has a pixel size, a width and a height, a variable number of band, a pixel type per band and a nodata value per band. Everything essential to do base raster GIS operations.