Channel Tunnel/1989-Traverse.gpx

Context can be found at Channel Tunnel#1989 Traverse and the source code can be found at Channel Tunnel/1989-Traverse.py.

<?xml version="1.0" encoding="UTF-8"?>
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<!--
     Paul Sladen, May 2013, for OpenStreetMap reference purposes

     Projected (using a simple spheroid model) into WGS84 from two
     estimated starting points at the top of Shakespeare Cliff Adit A2
     and then integrating over the two sets of Bearing+Distance pairs
     surveyed in 1989, and published in:

     Korittke, Norbert (1989)
     "Influence of horizontal Refraction on the traverse Measurements
     in Tunnels with Small Diameters"
     Deutsche Montan Technologie/Institute for Deposits and Surveying, Bochum, W-Germany
     http://www.slac.stanford.edu/econf/C9009106/papers/023.PDF p.13,14

     Tunnel chainages for the waypoint markers have been auto-generated from the
     stated marine service tunnel bore ring-number using an estimate of:

     chainage 19.841 + 0.0015062 * (ring_count - 1)
-->
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<time>1989-03-31T00:00:00Z</time>
<trk><name>Great Britain 1989-03 Zig-Zag-Traverse</name><number>1</number><trkseg>
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<time>1989-12-31T00:00:00Z</time>
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