メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.299022288654 43.1455665949627, 141.299398042482 43.1458501863758, 141.299717244836 43.1460892809518, 141.300100849051 43.1463625264299, 141.299272895752 43.1469284153855, 141.298454060996 43.1475246147377, 141.297625842337 43.1481241048961, 141.297282239995 43.147878893338, 141.297289062669 43.1478292270915, 141.297367455276 43.1472592317016, 141.297440961507 43.1467686667944, 141.297452138956 43.1466736049993, 141.297586122561 43.1456654302515, 141.29773462591 43.1445877507073, 141.299022288654 43.1455665949627)) ^^http://www.opengis.net/ont/geosparql#wktLiteral