メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.310332419675 42.2865834681861, 143.310923542993 42.2868323493372, 143.310432593383 42.2874502322153, 143.310390160671 42.2875071763216, 143.309816398382 42.28725433374, 143.308017467504 42.2864898946293, 143.308433564067 42.2859552879984, 143.308805129688 42.2859407476274, 143.310332419675 42.2865834681861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral