メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.21002501306 42.9676273777468, 143.210577620812 42.9676661349385, 143.210586248196 42.9676667656094, 143.210443598069 42.9691660528182, 143.210438736051 42.9692168011231, 143.210346387893 42.9701759577574, 143.20908178638 42.9700841147937, 143.208352280694 42.9700311235121, 143.20824314242 42.9700239478293, 143.207383233784 42.9699674167379, 143.207088584124 42.9673864570686, 143.208410420501 42.9675012300166, 143.208708948105 42.9675271453556, 143.21002501306 42.9676273777468)) ^^http://www.opengis.net/ont/geosparql#wktLiteral