メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.046036936591 42.8994990228043, 143.046801283218 42.8995655926173, 143.04681256075 42.8995796511104, 143.047713726627 42.9006707234446, 143.046931447529 42.9006055513048, 143.046804600382 42.9005948981205, 143.046615062691 42.9005817276703, 143.045133417622 42.900478847572, 143.045188222604 42.9000503491182, 143.045235137962 42.899637026208, 143.045261645927 42.8992734297256, 143.045874804134 42.8993183369241, 143.046036936591 42.8994990228043)) ^^http://www.opengis.net/ont/geosparql#wktLiteral