encoding  utf-8

survey extendedloop

  centreline

    extend start 1

    data normal from to length compass clino

    1  2  1  0  0
    2  3  1  0  0
    3  4  1  45  0
    4  5  1  90  0
    5  6  1.71  225  45
    6  2  1.71  225  -45
    5  7  1  90  0

  endcentreline

endsurvey