メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.379162554478 34.9682997518877, 138.379802925742 34.9692467065803, 138.379377108958 34.9694327099186, 138.378979577726 34.9696033867907, 138.378350386324 34.9686731996609, 138.377932619466 34.9680436604898, 138.378343633837 34.9678563098446, 138.378567429775 34.96774941181, 138.378718978089 34.9676770214193, 138.379162554478 34.9682997518877)) ^^http://www.opengis.net/ont/geosparql#wktLiteral