Angles and Directions
Azimuth and Bearings
Compute the interior angle at B
, Angles and Directions
Azimuth and Bearings
Compute the interior angle at B
, Compute Grid Bearing
(Whole Circle Bearing) From A To C)
1. A and B are control points
2. Set up the angular measurement WCB from A to B:
instrument (total station) above A
EB − E A
3. Sight from A to B (take HCR) WCB = tan −1 ( )
4. Sight from A to C (take HCR) NB − N A
780 − 800
HCR = Horizontal Circle Reading WCB = tan −1 ( )
810 − 800
B: 810mN, 780mE C Meridian
WCB = -63°26’5.8”
(-/+)
observation
(49°29’30”) (100°00’00”) α So WCB
= -63°26’5.8”+360°
θ =296°33’54”
A: 800mN, 800mE
Azimuth and Bearings
Compute the interior angle at B
, Angles and Directions
Azimuth and Bearings
Compute the interior angle at B
, Compute Grid Bearing
(Whole Circle Bearing) From A To C)
1. A and B are control points
2. Set up the angular measurement WCB from A to B:
instrument (total station) above A
EB − E A
3. Sight from A to B (take HCR) WCB = tan −1 ( )
4. Sight from A to C (take HCR) NB − N A
780 − 800
HCR = Horizontal Circle Reading WCB = tan −1 ( )
810 − 800
B: 810mN, 780mE C Meridian
WCB = -63°26’5.8”
(-/+)
observation
(49°29’30”) (100°00’00”) α So WCB
= -63°26’5.8”+360°
θ =296°33’54”
A: 800mN, 800mE
