メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355215944474 43.7604623799074, 142.355678782259 43.7607912615956, 142.35689687988 43.7615737716408, 142.355805420141 43.7627196764612, 142.354710356828 43.7634057967801, 142.354416171273 43.7632021391051, 142.352241177188 43.7616963652318, 142.352660513282 43.7614899245331, 142.353423909084 43.7611052756028, 142.35399872429 43.7606617249655, 142.354705770555 43.7601146774861, 142.355215944474 43.7604623799074)) ^^http://www.opengis.net/ont/geosparql#wktLiteral