メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.897628254441 43.0165410050282, 142.897111345733 43.0169808790138, 142.896587539531 43.0174265571009, 142.896461479232 43.0175338164379, 142.895994528635 43.017241976733, 142.895377196298 43.0168308582226, 142.89489464223 43.0165309436355, 142.894972767741 43.0164588388813, 142.89545054272 43.0160286879834, 142.896002847241 43.01553158359, 142.897628254441 43.0165410050282)) ^^http://www.opengis.net/ont/geosparql#wktLiteral