メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.044421916486 43.5710183550287, 142.044066423761 43.5712337680642, 142.043448292251 43.5716082496826, 142.04358097754 43.5717013114516, 142.043101891374 43.5720027239243, 142.042870807744 43.5719513319843, 142.042394010582 43.571580229934, 142.042932978002 43.5712467868451, 142.043278218126 43.5710329758195, 142.043599047113 43.5708505916786, 142.043939083661 43.570629456875, 142.044206431301 43.5704802412728, 142.044628235385 43.5708801418532, 142.044421916486 43.5710183550287)) ^^http://www.opengis.net/ont/geosparql#wktLiteral