メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.86686868932 35.4015472498611, 136.866841063641 35.4017674598194, 136.864814568412 35.4016266523945, 136.864834162213 35.4013936057476, 136.864821566622 35.4010857608435, 136.865460536766 35.4010604022367, 136.866023344374 35.4010123135897, 136.86650436881 35.4009549325053, 136.866895716704 35.4008950709498, 136.866906910366 35.4009614365895, 136.866911380953 35.4010146159179, 136.86686868932 35.4015472498611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral