メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.043154717475 43.5697923702918, 142.042872598293 43.5698057251985, 142.043155021629 43.5690912334137, 142.043454374832 43.5691138100517, 142.044370962375 43.56917225008, 142.044516905623 43.5697101369326, 142.044273157638 43.5697492655052, 142.043766356769 43.5697515385611, 142.043233908073 43.5696130065811, 142.043154717475 43.5697923702918)) ^^http://www.opengis.net/ont/geosparql#wktLiteral