5. A surveyor has completed a loop traverse from a control station which has state plane coordinates. In computing state plane coordinates since the traverse was small in size and the area was flat he used one scale factor and one elevation factor. He obtained a magnetic bearing for the beginning traverse line and used the magnetic declination to compute a geodetic direction, which he used for his basis of bearings. You are required to survey an adjacent parcel and tie both to his work and other existing control. What is the surveyor's biggest mistake, and how would you help him correct it