メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.571417909803 42.9830136653022, 141.571784525081 42.9829508490181, 141.571900521299 42.9833441282045, 141.572018613503 42.9836992995499, 141.572054437759 42.9838043057434, 141.571700957714 42.9838655127407, 141.571071392192 42.9839796595228, 141.570207532139 42.9841265951179, 141.569477523216 42.9842621507112, 141.569438274589 42.9835773781579, 141.569409888242 42.9832716176917, 141.570116549019 42.9832285505159, 141.570133392184 42.9832256958566, 141.571417909803 42.9830136653022)) ^^http://www.opengis.net/ont/geosparql#wktLiteral