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DP Tool Club 8
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CLOSE_EM
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1993-03-11
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This routine will calculate the direction and distance between two stations,
which are in reality in the same place.
It will also prestidigitate an absent survey call, but this is an exceedingly
dangerous operation. Not only will the result include the missing call, but
also all the errors and blunders accumulated over the entire land description.
Shyster surveyors often leave out the last call ("thence back to the
beginning") precisely for this reason.
I will guess that a closure is between the first and last station in the data.
If you do not like it, then you can enter the station names. Note that you
must include the prefix, if any.
I will close the loop, assuming that the error is in the compass. This is a
good assumption with the old deeds which were surveyed with an undamped compass
on a Jacob's staff, and a Gunter's chain. Modern theodolites and transits are
more accurate than any possible chain or Electronical Distance Meter, but if
you have enuf error with a transit to see, then you have a blunder and you
should find it.
If your loop closes without excessive error, then you can calculate the area.
It will be reported in units appropriate to the distance unit used for output.
A rood is a ¼ acre. A hectare is almost 2½ acres.
Access to the entire text files is thru <CONTENTS>.