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- 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 instructions are in the file CAVEMAP1.TXT