Spatial extensions allow DMBS systems to story and query spatial data using high-level query languages capable of expressing complex queries mixing descriptive and spatial criteria. This works explores the WKT Raster, part of PostGIS, the spatial extension for PostgreSQL, to manage raster data, more specifically remote sensing imagery. This spatial extension was chosen, because it is, to the authors knowledge, the most mature product that is free of license. Some typical remote sensing operations are executed using only the query language available in the WKT Raster. The results show that WKT Raster is a promising tool to handle raster data in object-relational databases. Some interesting features are the integration to the spatial types used to handle vector data and the large number of processing operators.Pages: 4700-470
