SURVEYING FOR THE HOMESTEAD

(Page 4 of 4)

July/August 1975
 
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You'll need to use a plumb bob to help you determine distances accurately in hilly areas. The device is suspended by a string wrapped around one of the foot markers on the chain. if, for example, you must measure downhill, the H.C. will hold out the tape as level as possible above the ground and set the pin at the spot marked by the point of the plumb bob. (See Fig. 7.) For really steep slopes, you may have to break your chaining length down to about five feet at a time.

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You cap also measure distances by counting steps when great accuracy isn't necessary. First, though, you must carry out a pacing test on a course of known length. Mark off 100 feet or more with a steel tape or rope (as described in this section), walk from one end of the line to the other, and record the number of steps you took. Do this about four times, add the totals, and divide by four for an average pace factor. This figure is a useful aid in 'making rough estimates of distance when you begin a measurement of elevation or angle.

NOTE: This is the first half of a two part article. The second half to be run in MOTHER NO. 35 will explain, among other things, how to measure elevations and angles.

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