What are the distances to the furthest reaches of Draenen?

furthest.py

# Requires: https://github.com/speleo3/inkscape-speleo/blob/master/extensions/survex.py by Thomas Holder
from survex import Survex3D

#This is the Oxford Draenen data:
# http://www.oucc.org.uk/DraenenSurvey/
mig=Survex3D('OD2.3d')

for destination in 'wiggly2.1','luck3.19','rifleman.1','pow.44':
    print "OD2 entrance.20 <> ",destination
    length, path = mig.shortestpath('entrance.20',destination)
    print "Shortest Path (m):", length / 100.0
    print "Shots in Path: ", len(path)
    #print "PATH: ",path
    print

output.dat

OD2 entrance.20 <>  wiggly2.1
Shortest Path (m): 2507.04096711
Shots in Path:  210

OD2 entrance.20 <>  luck3.19
Shortest Path (m): 5325.59207671
Shots in Path:  494

OD2 entrance.20 <>  rifleman.1
Shortest Path (m): 3375.00161578
Shots in Path:  281

OD2 entrance.20 <>  pow.44
Shortest Path (m): 4702.71359757
Shots in Path:  445