メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38270177209 43.7873853955278, 142.382527644825 43.7877340423094, 142.382290134685 43.7882556856093, 142.381994807288 43.7881741834957, 142.381524515974 43.7880638365935, 142.381869856475 43.787688590574, 142.381215897913 43.7874082180106, 142.380789982188 43.7869521128186, 142.381434131365 43.7867857051316, 142.381454908109 43.7867826571496, 142.382057579884 43.7866584684745, 142.382294787722 43.7867485808272, 142.382902320305 43.78694670449, 142.38270177209 43.7873853955278)) ^^http://www.opengis.net/ont/geosparql#wktLiteral