Miscellaneous Control in 2009 Manual

Strictly Surveying

Last Post by m & h taylor 11 years ago

3 Posts

2 Users

0 Reactions

4 Views

RSS

m & h taylor

(@m-h-taylor-2-2-2-2)

Posts: 260

Registered

Topic starter

I would be grateful to hear from anyone who feels expert in the 2009 Manual’s treatment of Miscellaneous Control (Sec. 7-59, pp. 178-179; but note that p. 179, containing Figs. 7-11 and 7-12, has been corrected and is available on the errata web page). Specifically: can you replicate the calculations in the description of the procedure?

Since I’ve mentioned before that I’m a student in the Wyoming Outreach program, I want to be clear that I’m not asking for help on schoolwork. I’ve just come up against some material that strikes me as very difficult, possibly because of erroneous presentation, but possibly not.

Our profile e-mail is good. Thank you.

Cheers,
Henry

Posted : June 25, 2013 10:14 am

Tangent

(@tangent)

Posts: 50

Registered

> I would be grateful to hear from anyone who feels expert in the 2009 Manual’s treatment of Miscellaneous Control (Sec. 7-59, pp. 178-179; but note that p. 179, containing Figs. 7-11 and 7-12, has been corrected and is available on the errata web page). Specifically: can you replicate the calculations in the description of the procedure?
...
> Cheers,
> Henry

I'm not sure I understand your question. Granted, I don't bring the manual home with me so I don't have it open to reference. Are you asking if that particular problem in the manual can be replicated or are you concerned about how to handle misc control?

MISCELLANEOUS CONTROL – A mathematical recovery of a lost corner by allowing every known corner within a reasonable radius which was tied to the missing corner to enter into the control, each control corner being given a weight inversely proportional to its distance from the missing corner.

Posted : June 25, 2013 7:12 pm

m & h taylor

(@m-h-taylor-2-2-2-2)

Posts: 260

Registered

Topic starter

Thanks very much for your response.

I feel fairly secure in my grasp of the concept. I have trouble with the example given in the two figures on p. 179. The coordinates of the “temporary” points are not given, but the bearings and distances between one of them and each of the other three are given. The bearings and distances between the temporary points that I calculate don’t match those in the Manual.

I also feel that the proportion formula near the bottom of p. 179, D/d = W/C, might yield a direct proportion rather than an inverse proportion.

Best,
Henry

Posted : June 25, 2013 10:02 pm