メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.748255177979 43.1613575365752, 141.74792241502 43.1617306517601, 141.747277094525 43.1623894771599, 141.746771879143 43.162134342278, 141.746326895316 43.1619096429715, 141.745883394868 43.1616856544727, 141.746508654595 43.1610199944053, 141.746864816632 43.1606407965028, 141.747105028403 43.1607650046281, 141.747266566798 43.1608122052408, 141.747361539537 43.1608405442142, 141.747753068482 43.1610932066321, 141.748255177979 43.1613575365752)) ^^http://www.opengis.net/ont/geosparql#wktLiteral