メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.393003817646 43.0747906121671, 141.393110801345 43.0749476149428, 141.393802632149 43.0758736206415, 141.392074102595 43.0765665614391, 141.392113307155 43.0766170714291, 141.39174428244 43.0767517256471, 141.391095263411 43.0758802545259, 141.390642381875 43.0752740588623, 141.390945510269 43.0751657789784, 141.391357509029 43.0750103503843, 141.391994599888 43.0747699633124, 141.39206383599 43.0747444610583, 141.392749342946 43.0744921249678, 141.392790319748 43.074477382273, 141.393003817646 43.0747906121671)) ^^http://www.opengis.net/ont/geosparql#wktLiteral