メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.2964938629 43.0980177829342, 141.2961604143 43.0982122778739, 141.29597182816 43.0983299140164, 141.295867166072 43.0983951504652, 141.295880649565 43.0974215619609, 141.295894190231 43.096778096279, 141.296212503439 43.096878083272, 141.297338174454 43.0972344574888, 141.297650559891 43.0973334076331, 141.297308340298 43.0975369751482, 141.29692727499 43.0977637074234, 141.2964938629 43.0980177829342)) ^^http://www.opengis.net/ont/geosparql#wktLiteral