メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.399481836051 40.7948863347541, 141.397561927284 40.7947062995473, 141.398150626701 40.7918233839125, 141.398637353114 40.7894472477898, 141.400066272063 40.7894548531044, 141.400029814208 40.790033501297, 141.400015324003 40.7903814135272, 141.399988767923 40.7912046406392, 141.399973171839 40.7918963176945, 141.399941810272 40.7921545380163, 141.399836359741 40.7928558052926, 141.399609790543 40.7941472515858, 141.399481836051 40.7948863347541)) ^^http://www.opengis.net/ont/geosparql#wktLiteral