I am reading deed calls which are in direction and degrees. For example, say a call says "North 31 degrees 20 minutes West 300 feet." What I need to do is reverse the call so I get the same angle but going the other direction. IOW I need to know what I would tell a surveyor to go Sxx.xxE to get a line of the exact same angle and length.

Thank in advance if you can help.

(Warning: I have no experience with surverying.)

360 degrees = 359 degrees 60 minutes

359 degrees 60 minutes minus 31 degrees 20 minutes = 328 degrees 40 minutes.

328.40-180=148.40 [minutes not decimals]

"South 31 degrees 20 minutes East." = 179.60-31.20=148.40 [minutes not decimals]

it checks. Two ways to get the same answer.

PS: I was relieved to see that this was not Teddy in a panic.

Quote:ChesterDog"North 31 degrees 20 minutes West" is an angle of 31 degrees 20 minutes counterclockwise from north. The reverse direction would be an angle 31 degrees 20 minutes counterclockwise from south, which is "South 31 degrees 20 minutes East."

(Warning: I have no experience with surverying.)

Look folks, y'all know I don't know nuttin' 'bout no reciprocal courses but I sure think the above is incorrect. You want a course that is 180 degrees from your given course.

Lets just do it from North 31 degrees West.. that is a course of (360-31)= 329 degrees. If you want the reciprocal its less 180 or 149 degrees.

Quote:ChesterDog"North 31 degrees 20 minutes West" is an angle of 31 degrees 20 minutes counterclockwise from north. The reverse direction would be an angle 31 degrees 20 minutes counterclockwise from south, which is "South 31 degrees 20 minutes East."

(Warning: I have no experience with surverying.)

I was also going to post this but it seemed too easy. I think I agree.

1. Deed calls are always N or S xx E or W. For example, N90E is a dead east line, N0E is a dead north line.

2. If you need more than said 90 degrees you simply go the other direction. For example, you would never go N91E but instead would (should) go s1E.

3. Surveyors can go clockwise or counterclockwise at will. This is my problem. If I have an angle going clockwise my plotter cannot take another from another guy who went counter-clockwise.

Since few here survey or work with this stuff let me put it another way for you to chew on and maybe come up with the simple formula.

You and I are a distance apart. Picture a right triangle. If you walk 70 feet to your left, then turn rignt and walk 120 feet you will be at my spot. Now, how would you calculate the angles in "deed calls" for you to walk to me and me to walk to you? And what do I do to get the recipricol on any given deed call?

I know this must be simple but cannot quite figure the trick.

Quote:AZDuffman...You and I are a distance apart. Picture a right triangle. If you walk 70 feet to your left, then turn rignt and walk 120 feet you will be at my spot. Now, how would you calculate the angles in "deed calls" for you to walk to me and me to walk to you? And what do I do to get the recipricol on any given deed call?...

If I am facing north and turn to my left to walk 70 feet west and then turn to my right to walk 120 feet north to reach your position, our position is at a bearing of this angle west of north from my original location: arctangent(70/120) = 0.528074 radians = 30.2564 degrees = 30 degrees 15 minutes 23.17 seconds. And the bearing of my original position from our position is south 30 degrees 15 minutes 23.17 seconds east.

In Excel, use this formula if x is the east-west distance and y is the north-south distance: =180*atan(x/y)/pi()

This angle A is in degrees, and to convert to degrees minutes and seconds, do D = int(A); M = int(60*(A-D)); S = (A-D-M/60)*3600

And the Excel formula for the distance between our positions is: =sqrt(x*x+y*y). For this example, the distance is 138.9244 feet.

(Edit: these formulas only work for a flat earth or for relatively small distances on a real earth.)

Quote:teddysLooks interesting! Looking forward to doing your job in a few weeks :)

I am sure you will enjoy it. Lucky for you in Ohio you don't have to deal with the calls nearly as much as we do here in PA. Most fun will be when you wake up in the middle of the night because you remembered or figured out something to complete your title chain. :-)