メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.039633409993 42.9180740677546, 143.039589186087 42.9183874909343, 143.039567428599 42.9185195129585, 143.039558963055 42.9185834331817, 143.039525318536 42.9188375632333, 143.039511183114 42.9189409075212, 143.03875879442 42.9188770881694, 143.038773988172 42.9187742282271, 143.038843476971 42.9183255949732, 143.038892963493 42.9180042586788, 143.038948169607 42.9176925192926, 143.039670245293 42.9177476147665, 143.039633409993 42.9180740677546)) ^^http://www.opengis.net/ont/geosparql#wktLiteral