geometry GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (POINT Z (30 10 40))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (LINESTRING Z (30 10 40, 10 30 40, 40 40 80))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (POLYGON Z ((30 10 40, 40 40 80, 20 40 60, 10 20 30, 30 10 40)))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (MULTIPOINT Z ((30 10 40)))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (MULTILINESTRING Z ((30 10 40, 10 30 40, 40 40 80)))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (MULTIPOLYGON Z (((30 10 40, 40 40 80, 20 40 60, 10 20 30, 30 10 40))))) GEOMETRYCOLLECTION Z (GEOMETRYCOLLECTION Z (POINT Z (30 10 40), LINESTRING Z (30 10 40, 10 30 40, 40 40 80), POLYGON Z ((30 10 40, 40 40 80, 20 40 60, 10 20 30, 30 10 40)), MULTIPOINT Z ((30 10 40)), MULTILINESTRING Z ((30 10 40, 10 30 40, 40 40 80)), MULTIPOLYGON Z (((30 10 40, 40 40 80, 20 40 60, 10 20 30, 30 10 40))))) GEOMETRYCOLLECTION Z EMPTY