メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.057756850754 42.9214502159161, 143.056865535245 42.9213846136188, 143.055312004587 42.9212602899796, 143.05528872483 42.9212584837779, 143.055456577965 42.9200314853697, 143.056177631304 42.920082541472, 143.05786906144 42.9201944171498, 143.057837144671 42.9205349088108, 143.057832361943 42.9205864261677, 143.057803328284 42.920920357134, 143.057796167889 42.9210023449855, 143.057756850754 42.9214502159161)) ^^http://www.opengis.net/ont/geosparql#wktLiteral