Chapter 9. Raster Analysis with GeoRaster

Spatial features can be represented in vector or raster format. So far we have discussed the vector related features of Oracle Spatial, and we introduce the raster related features called GeoRaster in this chapter. Traditional GISs propose to store raster data as BLOBs in the database. This approach might be sufficient if the raster data is only used as backdrop images in maps. But if any raster data processing and analysis is required, storing raster data as GeoRaster objects offers many features and advantages over storing this data just as BLOBs. Loading and storing any raster data inside a database simply for the purpose of storage or visualization provides limited utility. Storing raster data for use within a transactional system has engendered a view that one must see all data as part of a complete model; the data loaded must be seen in relation to all other data under the control of that model. The goal of this chapter is to demonstrate how...