メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.320996615384 43.0534195291716, 141.320891472352 43.0539168163796, 141.320683022504 43.0538630805815, 141.320071400758 43.0537201955884, 141.319767961982 43.0536441656684, 141.319656739548 43.0536170985748, 141.319339757399 43.0535425741963, 141.319540362747 43.0532145728626, 141.319547147612 43.0532034464894, 141.31964930616 43.0530245154271, 141.319696493204 43.0529419111442, 141.319739897471 43.0527670033749, 141.320513444153 43.0528810339233, 141.320590185414 43.0528924877028, 141.320834282165 43.0529288608304, 141.32107910567 43.0529615115572, 141.320996615384 43.0534195291716)) ^^http://www.opengis.net/ont/geosparql#wktLiteral