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    "zwiftInsiderUrl": "https://zwiftinsider.com/route/london-loop-reverse",
    "whatsOnZwiftUrl": "https://whatsonzwift.com/world/london/route/london-loop-reverse",
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    "note": "Select original index floor(i*(N-1)/(M-1)); retain original coordinates, elevations and progressive distances. No interpolation. Small features between retained samples may be omitted; raw streams remain available."
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}