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Over the past decade several products have been using enterprise database technology to store and manage geospatial imagery andraster data inside RDBMS, which in turn provides the best manageability and security. With the data volume growing exponentially,real-time or near real-time processing and analysis of such big data becomes more challenging. Oracle Spatial GeoRaster, differentfrom most other products, takes the enterprise database-centric approach for both data management and data processing. This paperdescribes one of the central components of this database-centric approach: the processing engine built completely inside thedatabase. Part of this processing engine is raster algebra, which we call the In-database Raster Analytics. This paper discusses thethree key characteristics of this in-database analytics engine and the benefits. First, it moves the data processing closer to the datainstead of moving the data to the processing, which helps achieve greater performance by overcoming the bottleneck of computernetworks. Second, we designed and implemented a new raster algebra expression language. This language is based on PL/SQL andis currently focused on the "local" function type of map algebra. This language includes general arithmetic, logical and relationaloperators and any combination of them, which dramatically improves the analytical capability of the GeoRaster database. The thirdfeature is the implementation of parallel processing of such operations to further improve performance. This paper also presentssome sample use cases. The testing results demonstrate that this in-database approach for raster analytics can effectively help solvethe biggest performance challenges we are facing today with big raster and image data

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

IN-DATABASE RASTER ANALYTICS: MAP ALGEBRA AND PARALLEL PROCESSING IN ORACLE SPATIAL GEORASTER