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Formulas That Work

Formulas That Work is a surveyor support group for sharing common or not so common calculation shortcuts and formulas for survey data calculations

Group Forum or Related Website: http://bit.ly/surveying-formulas
Members: 74
Latest Activity: Jun 14

Formulas That Work and Surveying Calculations Discussion Group

Share and discuss surveying calculation methods and formulas for finding solutions in the field.

Have a formula you'd like to share?

Start a new discussion, give your formula a title and describe what the formula allows you to calculate and a few situations when you have found your formula to be valuable in the field...

Surveyor Community Forum Discussions

L. R. , What is L R ? I was asked that one day. He was not ready for the answer.

Started by Billy Brooks. Last reply by Billy Brooks Jun 14. 10 Replies

One Day, On the tailgate of my survey truck I had plans waiting to be look at , and calculators here and there with Data Collectors, scales ,triangles erasers pen , pencils the every day survey…Read more →

Traverse, Traverse Line and How does GPS fit into all of this with GPS Traverse

Started by Billy Brooks. Last reply by Billy Brooks Apr 1. 13 Replies

If you look the word traverse up it is used as a noun, a verb, a adverb, a adjective and the list goes on.It also  has many definitions other than the survey term .  In…Read more →

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Subject Tags: surveying, GPS, traverse

Double rodding, I never called it this, I used Double turns, 2 of something

Started by Billy Brooks. Last reply by Billy Brooks Mar 21. 3 Replies

Hello Eveyone, I guess it does not matter what you call it ,if it can be mastered it saves time and money.Running…Read more →

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Subject Tags: surveying, method, levelling, double rodding

Calculation for levelling -- Collimation method or what ever else its called

Started by Rolita Rode La cock. Last reply by Billy Brooks Feb 24. 7 Replies

I created a spreadsheet to explain the collimation methods calculations to my surveying students, they found it very useful, hope that you will to !!! Just remember this is for 1st year students and…Read more →

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Subject Tags: equations, formula, students, field book, reduce

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Reply by Chris Root on March 12, 2011 at 7:28pm
a^2 + b^2 = c^2\!\, is one that will save the day in many occasions.  A right triangle solution called the Pythagorean theorem.

Reply by George Spencer on March 12, 2011 at 9:55pm
Thanks Justin for this website. When I was just starting out (1968), I sure would have liked for some kind of insight to help me to figure out various calculations. Of course, all I had then was a "Log Book" and my paper and pencil. In the office, I did have the availability of a Munroe hand-cranked calculator, but most of my calcs were by the old pencil and paper. In '72, we got a hand-held HP 35 (I think that's what it was), and that was the "cat's meow" for calculating. However, it still was manual calcs for figuring areas, closures, pre-determined areas, etc.
Reply by cujoBoudreaux on March 13, 2011 at 9:51am
(DELTA ANG/ 360 DEG) x ( PIE X 2 RAD) = LENGTH OF ARC. This formula shows that the delta ang establishes the percent of a circle, and that percent is directly proportional to the length of circumference it projects.....This can be done on a cheepy calc and needs minimum info. Hope this helps someone out there.
Reply by cujoBoudreaux on March 13, 2011 at 10:03am
to establish the chord...... Sin of Delta X Rad dist...... This should give you your chord but watch those significant digits, cuz if you round too early, it will be wrong.....lol..... again, hope it helps.
Reply by Scott D. Warner, PLS on March 17, 2011 at 10:17pm

A good base for understanding the triangle, the simplest polygon, which is, in the main, the most important to the Professional Land Surveyor, is the foundation of all other calculations.
Reply by Arnel M. Domag on March 18, 2011 at 7:51pm

Sometimes we are prompted to relate degree values to slope values in the field. Usually, our instrument only provide as degree values for vertical angles. How about if you're asked for a slope value corresponding to a given measured degree value? Just hit the tan function button in your calculator for that degree value and get the corresponding slope value.

Reply by Saleem javed ansari on March 21, 2011 at 6:33am

all  lsu member please tell me how can adjust the level and coordinate in excell. thank u

Reply by Arnel M. Domag on April 3, 2011 at 9:02am

@Saleem: I guess the space this venue provides is not enough to discuss how to do data reduction using Excel. In addition, it requires some graphic presentation to significanlty reduce the learning curve. Cheers..

Reply by ePalmetto on April 3, 2011 at 2:27pm
not sure what you mean by "not enough space to present"  because you can upload presentations, videos, graphics etc.
Reply by Jaybird on April 5, 2011 at 1:05am
why won't anyone in this group start a new discussion? all of these comments would become a lot more helpful within searchable discussions...

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