メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.256501985449 36.7127881561636, 137.256429249101 36.7126293036887, 137.25591208775 36.7120993889395, 137.255391997055 36.7115529999968, 137.256137699677 36.7113648120005, 137.256359094197 36.7113089561026, 137.256546939123 36.7115381275662, 137.255984291789 36.7118119366391, 137.25681791768 36.7124631331983, 137.256925435051 36.7125916157944, 137.256501985449 36.7127881561636)) ^^http://www.opengis.net/ont/geosparql#wktLiteral