メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.258533195079 44.0261841540758, 144.257866508564 44.0259618385826, 144.257906954224 44.0260743811977, 144.257295718102 44.0262587923252, 144.256890297364 44.0255599841676, 144.257016565091 44.0255879572953, 144.25709000042 44.0255866648681, 144.257131431094 44.0255783832694, 144.257167160977 44.0255513322002, 144.257389533915 44.0251585185625, 144.257521698723 44.0252053264333, 144.258876859927 44.0256722292324, 144.258533195079 44.0261841540758)) ^^http://www.opengis.net/ont/geosparql#wktLiteral