7/25/2019 05 Traversing W

1/22

Traversing

Surveying for Engineers

ERE 371

7/25/2019 05 Traversing W

2/22

ERE 371

Traversing

Definition of traverse

Series of connected lines

Components of traverse

7/25/2019 05 Traversing W

3/22

ERE 371

Traversing

Definition of traversing

Application

7/25/2019 05 Traversing W

4/22

ERE 371

Types of Traverses

at!ematical Closure

Closed traverses

"eometrically closed #polygon$

7/25/2019 05 Traversing W

5/22

ERE 371

Closed Traverse% "eometrically Closed

A

&

"

'

ED

C

(

Control station

Traverse station

7/25/2019 05 Traversing W

6/22

ERE 371

Types of Traverses

Closed traverses cont)

"eometrically open

7/25/2019 05 Traversing W

7/22

ERE 371

Closed Traverse% "eometrically *pen

A

&"

'

ED

C(

Control station

Traverse station

7/25/2019 05 Traversing W

8/22

ERE 371

Types of Traverses #cont+d$

*pen traverse

7/25/2019 05 Traversing W

9/22

ERE 371

*pen Traverse

Control station

Traverse station

A&

"

'

ED

C(

7/25/2019 05 Traversing W

10/22

ERE 371

easuring and E,pressing Angles

-nterior angles

7/25/2019 05 Traversing W

11/22

ERE 371

easuring and E,pressing Angles

Deflection angles

easured left or rig!t from e,tended line to ne,t line

*ften used for geometrically open traverses #e)g) along route$

.rocedure

7/25/2019 05 Traversing W

12/22

ERE 371

easuring and E,pressing Angles

Angles to rig!t

Traversing /y a0imut!s

7/25/2019 05 Traversing W

13/22

ERE 371

easuring and E,pressing Distance

se any met!od to meet re2uired accuracy

Approac!

7/25/2019 05 Traversing W

14/22

ERE 371

Stationing

Application

se stations4 and pluses4

7/25/2019 05 Traversing W

15/22

ERE 371

Stationing

5655

617)8

1611)

1611) 9 111) feet from point of /eginning #along route$

111)7:

15;)7:

3638)7

7/25/2019 05 Traversing W

16/22

ERE 371

Traverse Stations #&u/s$

>ocation depends on purpose of su/se2uent survey

"eneral issues

-ssues ?it! location

7/25/2019 05 Traversing W

17/22

ERE 371

Referencing Traverse Stations

easure ties

-ssues

7/25/2019 05 Traversing W

18/22

ERE 371

"ood Distri/ution of Tie@-ns

(uilding

8)

7/25/2019 05 Traversing W

19/22

ERE 371

.oor Distri/ution of Tie@-ns

(uilding

8)

7/25/2019 05 Traversing W

20/22

ERE 371

Errors and istaBes

.ersonal errors

-nstrumental errors

atural errors

istaBes

7/25/2019 05 Traversing W

21/22

ERE 371

Traverse Computations

.urpose

C!ecB if traverse meets re2uired accuracyprecision

Adust traverse to get geometric consistency

Compute locations of control points

Components of compass rule adustment

Adust angles #satisfy geometry$

Determine preliminary line directions

Calculate departures and latitudes Adust departures and latitudes

Calculate station coordinates

Calculate adusted lengt!s and directions of lines

7/25/2019 05 Traversing W

22/22

ERE 371

Readings

C!apter = sections =)1 =)F =)15F =)11