メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352830948753 43.1508093106958, 141.352883982171 43.1512358490853, 141.352948593542 43.1516852634074, 141.352984725196 43.1520524527371, 141.352507800694 43.152105398305, 141.350995507925 43.1522880589119, 141.350887502487 43.1517592541935, 141.35082787704 43.1514886538702, 141.350723127181 43.1510131831474, 141.350642874406 43.1506491648982, 141.352125532407 43.1504804798581, 141.352777371411 43.1504200429983, 141.352778848826 43.1504306743376, 141.352830948753 43.1508093106958)) ^^http://www.opengis.net/ont/geosparql#wktLiteral