メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340177475408 43.7984510581294, 142.340118628862 43.7984089992286, 142.339510026081 43.7988400387209, 142.33945904495 43.7988798961062, 142.339397363553 43.7988468743911, 142.339327695824 43.798794722527, 142.33908023602 43.7986172791817, 142.339147519789 43.7985662811274, 142.339188913655 43.7985493185258, 142.338772070431 43.7982246723357, 142.338759309472 43.7982154354366, 142.337923651525 43.7976114270213, 142.338487410795 43.7971924202072, 142.339189126346 43.796718979327, 142.339203304902 43.7967087717315, 142.34095503979 43.7978844405535, 142.34087536933 43.7979325171249, 142.340177475408 43.7984510581294)) ^^http://www.opengis.net/ont/geosparql#wktLiteral