メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.585606675836 43.3343333829798, 145.585233133825 43.3348017093149, 145.584846712418 43.3353023355699, 145.583530317192 43.3347386770326, 145.583897637297 43.3342620285406, 145.58427875217 43.3337700686626, 145.584961735091 43.3340543370559, 145.585606675836 43.3343333829798)) ^^http://www.opengis.net/ont/geosparql#wktLiteral