メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.748468931806 42.9050753832141, 140.747309859075 42.9051300016868, 140.746705710312 42.9051680605169, 140.746123570323 42.905190440611, 140.746065584541 42.9042776235915, 140.746606824621 42.9042568159896, 140.747221382054 42.9042388680346, 140.747818701723 42.904205781545, 140.748369195272 42.9041823444797, 140.748410943017 42.9044450170473, 140.748523883914 42.9044903862297, 140.748602357164 42.9050651784486, 140.748468931806 42.9050753832141)) ^^http://www.opengis.net/ont/geosparql#wktLiteral