メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.336779740881 43.7791285653928, 142.336429566155 43.7791010763527, 142.336217095367 43.7790843817062, 142.336132460928 43.7790777301083, 142.336489608726 43.7786871678056, 142.337701062825 43.7773623452941, 142.338560865156 43.7764291534903, 142.339118132508 43.7767582037226, 142.338948004531 43.7769077543182, 142.338889074488 43.7769428731369, 142.338051991066 43.7777725215994, 142.336779740881 43.7791285653928)) ^^http://www.opengis.net/ont/geosparql#wktLiteral