メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.779166873935 35.4814285941656, 136.779182711662 35.4819507637463, 136.779203878425 35.4829337335019, 136.779243794278 35.4839388401684, 136.776277955766 35.483994045885, 136.776254352957 35.483729160951, 136.776167874761 35.483014873606, 136.776101978138 35.4823357199534, 136.776010573171 35.4814924449305, 136.775968235822 35.4810962392177, 136.775988273092 35.4809582485232, 136.779152427251 35.4809034013409, 136.779166873935 35.4814285941656)) ^^http://www.opengis.net/ont/geosparql#wktLiteral