メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.443865005873 43.8234513354767, 142.441595237998 43.8253241493228, 142.439722953491 43.8269352133045, 142.436617406857 43.8296072479885, 142.436208632229 43.8299464075395, 142.435491772297 43.8295986341825, 142.434305417624 43.8286143380878, 142.433397310029 43.8275345222063, 142.432858948234 43.8269513589464, 142.431729945732 43.8259663316438, 142.436316807599 43.822182322624, 142.436847550921 43.8224252249169, 142.439181893004 43.8205098012641, 142.443865005873 43.8234513354767)) ^^http://www.opengis.net/ont/geosparql#wktLiteral