wiki:WKTRaster

Version 4 (modified by mloskot, 11 years ago) (diff)

Parts of WKT Raster Overview section

WKT Raster

Welcome to the WKT Raster project home page!

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 Oracle Spatial GeoRaster.

The goal of 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

For more details and examples of application:

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.

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