メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.169732405317 34.9439947551711, 137.16973963209 34.9440332794468, 137.169797393031 34.9443122491002, 137.169299825237 34.9443595028112, 137.169008472924 34.9444988786009, 137.168039919098 34.9439120488651, 137.168461200279 34.9438440219506, 137.169148226298 34.9437419099743, 137.169681861922 34.9437257865317, 137.169732405317 34.9439947551711)) ^^http://www.opengis.net/ont/geosparql#wktLiteral