EXAMPLE2.TXT

You will notice that the survey does not close.  That is, the last station that
goes "thence back to the beginning" has been given a distance of zero and left
hanging.  There is no reason to believe that it closes the gap.  Since the
survey runs down a ridge road, there is a lot of reason to believe that the
closing station should have a direction similar to the first station and the
penultimate [next to last] station, and perhaps a similar distance too.

You can close the loop assuming no distance for the closing shot.  Select "C"
from the main menu.  The first closure station is "JG0" and the second is
"JG25".  You should get a closure error of 3.1%, which is normal for a survey
of this sort.  You can easily survey it yourself to this degree of precision.
CAVEMAP will close the loop as best she can, and will calculate the acreage.
The calculated acreage is 27.3 acres.  Surveys with large errors may give some
strange answers.  You should not have any large errors when you survey it
yourself, but you may find some fantastic blunders in other people's surveys.

The file "EXAMPLE2.CAV" contains the data from the second tract.  I assigned
the coordinates of the initial station such that it is in the proper
relationship to EXAMPLE1.CAV.  Read it, display it, list it, map it, whatever
it.  Notice that again, the surveyor didn't want you to know just how bad a job
he did.  No direction nor distance is given for the last station.  However, it
is known from observing the property that the final shot was the same as shot
JG9 on the first tract, only backwards.

From the main menu, choose "S" to shoot a station.  Give the station a name,
such as "ICLOSE".  "FROM->" is JGA19.  The direction is S 65 E and the distance
is 15 poles.

Recalculate after "D" displaying data.  You can now close "C" station "JGA0"
and "ICLOSE".  The closure error is 6.9% and the calculated acreage is 6.9
acres.

Further instuctions are in the file CAVEMAP1.TXT