Download polygon:
http://polygons.openstreetmap.fr/?id=75767 Remove prefix and postfix:
%{"type":"GeometryCollection","geometries":[%
%]}% Create shape file:
ogr2ogr brent-polygon.shp brent-polygon-one-feature.geojson Clip data:
ogr2ogr -clipsrc brent-polygon.shp -f "GeoJSON" \ ways-in-brent.geojson ways-in-brent-raw.geojson