@ — Returns TRUE if A's bounding box is contained by B's. Uses double precision bounding box.
boolean @(
              raster 
              A
            , 
              raster 
              B
            );
boolean @(
              geometry 
              A
            , 
              raster 
              B
            );
boolean @(
              raster 
              B
            , 
              geometry 
              A
            );
The @ operator returns TRUE if the bounding box of raster/geometry A
            is contained by bounding box of raster/geometr B.  
                 
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                 This operand will use spatial indexes on the rasters.  | 
            
Availability: 2.0.0 raster @ raster, raster @ geometry introduced
Availability: 2.0.5 geometry @ raster introduced