メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.858709730816 43.3295389494598, 141.858897037459 43.330165718973, 141.857842175179 43.3303350518622, 141.857786749681 43.3303439344272, 141.85723130262 43.3304320522999, 141.857042268049 43.3298113232257, 141.856868933822 43.3291947968719, 141.857120496273 43.3291512820016, 141.857721823199 43.3290505920126, 141.858532968948 43.3289220608287, 141.858709730816 43.3295389494598)) ^^http://www.opengis.net/ont/geosparql#wktLiteral