メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.378958515582 43.0461983429976, 141.378977099623 43.0462142329437, 141.379307843674 43.046497019794, 141.378871304594 43.0467712917887, 141.378483356649 43.0470064066702, 141.377658497105 43.046288383346, 141.376944703481 43.0456645995727, 141.377755516174 43.0451656692071, 141.378205861077 43.0455416381439, 141.378480129828 43.0457703303335, 141.378738748788 43.0460017177802, 141.378958515582 43.0461983429976)) ^^http://www.opengis.net/ont/geosparql#wktLiteral