メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.416294327277 31.9318224284791, 131.416302150035 31.9321017852082, 131.416313835206 31.9326438108373, 131.416331703083 31.9333394942053, 131.415103577467 31.9333289900126, 131.413727874939 31.9333178253185, 131.412293440236 31.9333098663672, 131.412238495404 31.9328731083494, 131.412127843308 31.9318827001935, 131.412012573147 31.9310803694183, 131.413588204692 31.9310573632595, 131.413614439006 31.9310572780363, 131.415041330749 31.9310217719558, 131.415111821743 31.9310152007853, 131.41626108549 31.9309872799009, 131.416293174787 31.9315654570809, 131.416294327277 31.9318224284791)) ^^http://www.opengis.net/ont/geosparql#wktLiteral