1.15 Raster Tiles

Oracle Spatial GeoRaster provides support for generating standard raster tiles from either an individual GeoRaster object or a virtual mosaic of many GeoRaster objects, regardless of the underlying GeoRaster storage format in database tables. Combining this raster tiling capability and Oracle REST Data Services (ORDS), you can create raster tile service and serve any imagery and other raster data to the web directly from the database. For example, users can simultaneously stream imagery and DEM rasters encoded as Mapbox Terrain-RGB to the web for 3D visualization.

A tiling scheme defines how a raster dataset is split into a grid of square tiles across multiple zoom levels. GeoRaster raster tile generation supports two tiling schemes: WebMarcatorQuad and TMS. The tiles are compatible with Open Geospatial Consortium (OGC) Web Map Tile Service (WMTS) tiling scheme and MapBox Terrain-RGB encoding specifications. The actual tiles can be delivered in PNG, JPEG, or TIFF format. This tiling approach allows efficient access and web-based delivery of imagery and raster data at various levels of detail, which also reduces the complexity of web application development.

Using the SDO_GEOR_UTL.get_rasterTile function, you can generate raster tiles from spatial GeoRaster objects in database tables. See Creating and Using Raster Tile Service for Web Application for more information.