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<DIV>I would appreciate any suggestions regarding the best (easiest, quickest)
way to locate points on the surface that directly overlie survey stations in the
cave. For example, suppose we find a place in the cave with surface debris and
would like to examine the surface directly above for an entrance or dig. The
ideal solution would allow me to input surface survey data in the field using a
laptop and would generate an azimuth and distance from the last station to the
desired point. I've sometimes overlayed the cave map or lineplot onto a topo or
satellite image to identify the general area, but I'm looking for a much more
precise solution. Currently, I survey overland from the
entrance toward the area overlaying the station I want to get above. As I
get close, I temporarily rename the last surface survey station to the name
of the station in the cave below. This tells Therion that I've closed a loop and
it gives me the closure error in all three axes. The x and y axis tell me
how close I am, and I can guesstimate an approximate azimuth for the next shot
to get closer. This eventually gets me close, but it is subject to blunders and
overly time consuming. Is there a better way, perhaps through some
function of Therion with which I am unfamiliar? Thanks for any ideas.</DIV>
<DIV> </DIV>
<DIV>JP</DIV></FONT></BODY></HTML>