メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.231736539282 35.0705423925611, 135.231644527218 35.0707832225991, 135.231104043292 35.0711997798987, 135.230727165031 35.0711158119212, 135.230507347935 35.0710440585884, 135.231057631258 35.0704195391283, 135.231736539282 35.0705423925611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral