メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.140172323617 39.4576838736671, 141.139862138653 39.4566824969058, 141.140121815038 39.4565222048621, 141.14032394801 39.4563597058399, 141.140397590929 39.4565801337721, 141.140411219061 39.4569274984761, 141.140358444184 39.457317227625, 141.140304947002 39.4575427057599, 141.140172323617 39.4576838736671)) ^^http://www.opengis.net/ont/geosparql#wktLiteral