メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355095352503 43.7758734524863, 142.355327928086 43.7762628995618, 142.355844143584 43.7761166546812, 142.35599141311 43.7763804639503, 142.355348469491 43.7764018340546, 142.356262981403 43.7779986737449, 142.355373563441 43.7779499198211, 142.355033863217 43.7772989127544, 142.354744941118 43.7767621265875, 142.35457806854 43.7764881544992, 142.354365334381 43.7760865402333, 142.354129968149 43.7756781776366, 142.354661390828 43.7755303596702, 142.354858424561 43.7754766963498, 142.355095352503 43.7758734524863)) ^^http://www.opengis.net/ont/geosparql#wktLiteral