Source and receiver points for seismic lines recorded during the geophysics field school near Spring Coulee Alberta were surveyed with a Sokkia real time kinematic (RTK) GPS survey. The points were also surveyed with two hand-held Garmin GPS receivers. In order to determine what sort of station spacing could be adequately surveyed with the hand-held units, geophones were repeatedly surveyed with all three systems. The RTK system had a maximum error of 10 cm in x, y and z . Repeated hand-held measurements cannot resolve stations less than two meters apart in x and three meters apart in y.
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