[Geocoding] [OpenStreetMap] #4960: Incomplete polygon points returned for "London"

[OpenStreetMap]

#4960: Incomplete polygon points returned for "London"
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 Reporter:  flamingtoast                |      Owner:  geocoding@…
     Type:  defect                      |     Status:  new
 Priority:  minor                       |  Milestone:
Component:  nominatim                   |    Version:
 Keywords:  london, polygon, nominatim  |
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 The nominatim API returns an incomplete set of polygon points that only
 cover half of london
 (http://nominatim.openstreetmap.org/search.php?format=json&q=london&limit=1&polygon=1),
 yet using the OSM nominatim web interface gives us the complete shape:
 (http://nominatim.openstreetmap.org/search.php?q=london&viewbox=-168.76%2C62.6%2C168.76%2C-62.6&polygon=1).
 Why is this happening?

 Plotting the points returned by the API yields this shape:
 [[Image(http://i.imgur.com/iVGIAS3.jpg)]]

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Ticket URL: <https://trac.openstreetmap.org/ticket/4960>
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