Land Surveyor Forum

Replies

• 

  Εδουάρδος Πολίτης August 1, 2015 at 8:14am

  This will be very helpful for you: https://www.microsoft.com/en-US/store/Apps/Land-Survey-Tools/9WZDNC...
• 

  David B. Ivey July 19, 2015 at 3:19pm

  Pretty simple formula.....

  Bearing= ATAN(change x/change in y) 

  Bearing=ATAN[(235.98-465.01)/(435.25-401.90)]

  Bearing=ATAN(-229.03/33.35)

  Bearing=ATAN(-6.8674663)

  Bearing=-81.7151543 or in DMS -81.4255   Be conscious of direction, By looking at the coordinates, it is easy to tell that the bearing is going south and east.

  Bearing=S81-42-55E

  Hope that help!

  David
• 

  Wayne Peter Wilson July 16, 2015 at 3:21am

  tan-1 delta E/delta N

  i.e subtract easting Pt.A from easting Pt B, northing Pt A from northing Pt B to derive deltas (difference in grid distances), then use these deltas in the above formula. Opposite direction is of course calculated bearing +/- 180d.

  Hope that helps
• Government Professional

  Bill Furman July 15, 2015 at 9:03pm

  I will post a formula as soon as I find it, should be in the next day or 2.
  • Government Professional

    Bill Furman > Bill Furman July 16, 2015 at 8:31pm

    sorry, i can't find my copies but i see that the same one is already posted.
• Seeking Employment

  Sainglong Kaing July 14, 2015 at 9:20pm

  Try below my friend or google more!

  http://www.igismap.com/formula-to-find-bearing-or-heading-angle-bet...
• Land Surveyor

  J. Anthony Cavell July 14, 2015 at 7:09pm

  The distance = SQRT((x2 –x1)2+(y2 –y1)2+(z2 –z1)2)

  The azimuth = arctan((x2 –x1)/(y2 –y1)) (always in two dimensions)

  The plunge = arcsin ((z2 – z1) / distance) (if interested in 3D)

  You can do the math.

  JAC
• Student Surveyor

  Mat Win July 14, 2015 at 7:01pm

  thanks eveybody appreciate the help
• 

  Henry P Mayo July 14, 2015 at 6:40pm

  In a trig calculator (HP in my experience), simply subtract the easting of point A from the easting of point B, then subtract the northing of point A from the northing of point B, hit R-P (rectangular to polar) and you will get the direct distance, then the angle from North or East.

   You may need to hit roll-down to see the azimuth and you will need to use your brain a little, to see what quadrant (NE, SE, SW, NW) that answer should be in (is the delta North more or less than the delta East?).   You will also need to convert to D.MMSS if that is what you want the answer to be in.

  As I put this in writing, it seems complex, but I have been doing this in the field for 35+ years, since my father taught me the great functions programmed into HP trig calculators.  
  • 

    Mark Sidler > Henry P Mayo July 14, 2015 at 7:02pm

    Calculate bearing

    An=435.25 Bn=401.90
    Ae=235.98 Be=465.01

    Bn-An = Dn = -33.35
    Be-Ae = De = 229.03

    Inverse distance = sqrt of (Dn^2+De^2) = 231.4454 = Hypotenuse or Hyp

    Bearing by determining angle off of N-S grid line

    1. ArcSin(De/Hyp) this is in decimal degrees
    2. De/Hyp= 0.98563845
    3. ArcSin(0.98563845) = 81.7151184
    4. 81 degrees 60x 0.7151184 = 42.9071041
    5. 42 minutes 60x 0.9071041 = 54.426
    6. 54 seconds

    NW              NE
    Dn+ De- | Dn+ De+
    --------------------------
    Dn- De- | Dn- De+
    SE             SW

    S.81°42'54"E. 231.4454 units (i.e. feet or meters or miles or kilometers)

    I think this is one method.  I think it is correct, did it pretty quickly.

    Make your life easy. Download my DC_Survey Software its free!

    www.dc-survey-software.com
    Good luck
    Marcus [email protected]