メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.063212716553 42.9163270057648, 143.063541284903 42.9168339485688, 143.063433747693 42.9168280316332, 143.062676722595 42.9167681375897, 143.062660553895 42.9167682523218, 143.061670507439 42.916707120438, 143.061736389878 42.9162150309741, 143.061783734482 42.9158053605868, 143.061816597618 42.9155170462657, 143.062783058333 42.9156417836309, 143.063212716553 42.9163270057648)) ^^http://www.opengis.net/ont/geosparql#wktLiteral