In OGR, the GetGeometry() method from the Geometry class returns a bounding box in the (xmin, xmax, ymin, ymax) structure. However, the SetSpatialFilterRect() method from the Layer class expects a bounding box in the (xmin, ymin, xmax, ymax) structure. This is a problem that can be worked around, but it does generate confusion. Any reason why this couldn't be standardized?
Also, on a similar note, having SetSpatialFilterRect expect an array of coordinates, instead of coordinates as individual arguements, seems more logical to me, as it's how every other GIS package returns bounding box info afaik, including OGR's GetGeometry.
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