メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.651887018799 42.8257045709543, 141.652667160146 42.8263906681988, 141.652171450437 42.8267915087274, 141.651603866545 42.8272628667018, 141.650676986893 42.8266728419957, 141.650157099408 42.8263318145694, 141.650779459941 42.8258331801559, 141.651436238602 42.8253065188626, 141.651887018799 42.8257045709543)) ^^http://www.opengis.net/ont/geosparql#wktLiteral