Introduction: Cover the geometry with Google S2 Cells, return the corresponding cell IDs with the given level. The level indicates the size of cells. With a bigger level, the cells will be smaller, the coverage will be more accurate, but the result size will be exponentially increasing.
Format: ST_S2CellIDs(geom: geometry, level: Int)
Return type: Array<Long>
SQL example:
SELECT ST_S2CellIDs(ST_GeomFromText('LINESTRING(1 3 4, 5 6 7)'), 6)
Output:
+------------------------------------------------------------------------------------------------------------------------------+ |st_s2cellids(st_geomfromtext(LINESTRING(1 3 4, 5 6 7), 0), 6) | +------------------------------------------------------------------------------------------------------------------------------+ |[1159395429071192064, 1159958379024613376, 1160521328978034688, 1161084278931456000, 1170091478186196992, 1170654428139618304]| +------------------------------------------------------------------------------------------------------------------------------+