メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.312434266031 43.0638600797089, 141.312759724811 43.0636519007426, 141.313319003907 43.0641191039383, 141.313563850295 43.0643228820517, 141.313777375496 43.0644608563716, 141.313838834075 43.0644940620609, 141.313873070426 43.0646079234507, 141.314003512484 43.0648289793758, 141.314126572321 43.0650499045442, 141.313986824189 43.0651124089347, 141.313510946345 43.065352907516, 141.313128270311 43.0650035459873, 141.312868194814 43.0647478801708, 141.312574637587 43.0644927838352, 141.312102542714 43.0640763658976, 141.312434266031 43.0638600797089)) ^^http://www.opengis.net/ont/geosparql#wktLiteral