メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355297489746 44.4837852346206, 142.355285181397 44.4837821517692, 142.355193627163 44.4837591745441, 142.354048807706 44.483471802375, 142.353036616687 44.4832177307969, 142.353654623786 44.4819244673641, 142.354670025823 44.4821924152493, 142.354742400237 44.4822080286106, 142.35463727626 44.482449229625, 142.355801183224 44.4827314098515, 142.355297489746 44.4837852346206)) ^^http://www.opengis.net/ont/geosparql#wktLiteral