Oracle Spatial Data Option (4)
SDO_LEVEL - The SDO_LEVEL column stores the number of times the tiles that interact with a geometry should be decomposed. It is the termination criteria for fixed tiling. Use the SDO_TUNE.ESTIMATE_TILING_LEVEL procedure to determine an appropriate tiling level for your data.
SDO_NUMTILES - The SDO_NUMTILES column is the number of variable-sized tiles used to tessellate each object in the <layername>_SDOGEOM table. This column must be set to NULL when using fixed-size tiles.