メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.172113427132 34.9584166899314, 137.172217407314 34.9586971993428, 137.17176183616 34.9587596129766, 137.171318534565 34.9588310416925, 137.171140853241 34.9588655592313, 137.171076458976 34.9586870968963, 137.171050765795 34.9586324459549, 137.170917043626 34.9583477804094, 137.17084797117 34.9582066460976, 137.170799112806 34.9580970617897, 137.171258528659 34.9579506298209, 137.17160603717 34.9578555424438, 137.171888095581 34.9577651738978, 137.172113427132 34.9584166899314)) ^^http://www.opengis.net/ont/geosparql#wktLiteral