var feature = {"geometry": {"type": "Polygon", "coordinates": [[[-231.304241727798, 1682.74422719708], [825.474710540096, 1682.74422719708], [825.474710540096, -272.6456886681], [-231.304241727798, -272.6456886681], [-231.304241727798, 1682.74422719708]]]}, "type": "Feature", "properties": {"id": "7014"}}

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<SRS>EPSG:4326</SRS>
<SRS>EPSG:900913</SRS>
<LatLonBoundingBox minx="-180" miny="-90" maxx="180" maxy="90" />
<BoundingBox SRS="EPSG:4326"
            minx="-180" miny="-90" maxx="180" maxy="90" />
...
<Layer queryable="0" opaque="0" cascaded="0">
    <Name>image</Name>
    <SRS>EPSG:4326</SRS>
    <SRS>EPSG:4269</SRS>
    <SRS>EPSG:900913</SRS>
    <LatLonBoundingBox minx="-231.304" miny="-272.646" maxx="825.475" maxy="1682.74" />
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lng = ((x + 180) % 360) - 180), lat = ((y + 90) % 180) - 90)

lng = ((((x + 180) % 360) + 360) % 360) - 180
lat = ((((y + 90) % 180) + 180) % 180) - 90