メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.752958197129 42.9048630960283, 140.75152580537 42.9049448447804, 140.751194508244 42.9049677222597, 140.750820514347 42.9049837798465, 140.750626447197 42.9049854565943, 140.750556543854 42.9040601771115, 140.751454966458 42.9040180762942, 140.752160162115 42.903978643633, 140.752870906805 42.9039392081311, 140.752958197129 42.9048630960283)) ^^http://www.opengis.net/ont/geosparql#wktLiteral