メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.817571584096 35.3942611915016, 136.81888645408 35.3945573442671, 136.818786003931 35.3948585963818, 136.818634277589 35.394832670287, 136.818393018894 35.3948032480396, 136.817424866269 35.3949455371564, 136.815911934622 35.3950224483649, 136.816309315325 35.3939791898598, 136.816943609752 35.3941248840709, 136.817571584096 35.3942611915016)) ^^http://www.opengis.net/ont/geosparql#wktLiteral