Direction
At a point
Of a line or line of sight
Angular value from the meridian to the line
Angular value in the horizontal plane
Use Bearing or Azimuth definition
Forward and backward direction
See Sections 7.1 7.9 in the text.
Direction Definitions
Bear
Closed Linear Traverse
Traverse must fit between established
known control stations
Closure error is
south and west
Adjust latitudes by increasing north latitudes and decreasing south latitudes
Adjust departures by increasing east departures
Known coordin
Closed Polygon Traverse
Closure error is
south and east
Adjust latitudes by increasing north latitudes and
decreasing south latitudes
Adjust departures by increasing east departures and
decreasing west departures
See text Figure 9.1(a)
Traverse Computatio
Types of Meridians
Geodetic and Astronomic (true)
Magnetic, Declination relates magnetic to True North
Declination changes with time and location
See Section 7.15 in the text
Grid, Mapping angle relates grid to Geodetic
Mapping angle computed using projec
Lab: 3:M-pm 4:T-pm 8:Th-pm
(circle one)
Name _
Date _,
Page 1 of _
CE 203 Principles and Practice of Geomatics
Homework Assignment 9, Spring 2015
Format _ Late _
Grade: _ / 10
Due:
Assignment is due at the beginning of the Friday lecture, 4-17-15.
Last da
CE 203
Exam 1 Review
Wednesday 10/05/2016
Chapter 6 Distance Measurements
Pacing counting number of steps or paces in a required distance. (determine the length of
ones pace)
Odometer readings converts the number of revolutions of a wheel of known circumf
CE 203
Exam 1 Review
Wednesday 10/05/16
Chapter 3: Theory of Errors in Observations
Sources of Error:
Natural Error wind, humidity, etc.
Instrumental
Personal
Types of Errors:
Systematic biases / cumulative errors
Random accidental errors remain in measur
Abstract
The purpose of the lab was to determine the elevation of an inaccessible point. To do this our
team implemented the use of a total station with a tripod, prism pole with a prism, level rod, tool belts
with plumb bob, and a field notebook. Two sta
GPS
DETERMINATION
OF GEODETIC
POSITION
Amrith Nair
CE 203 Geomatics
Lab 10 |Party 5
10/5/2015
Abstract
In an effort to determine the quality of absolute positions observed by a GPS navigator receiver,
data was collected from a large group of people. The p
Z
Earths Size and Shape
PrimeMeridian
Longitude = 0
-X
-Y
Y
X
Equatorial Plane
Latitude = 0
-Z
The Earths Geoid Surface
An Ellipsoid Approximation
N
b
a
The equipotential surface of the
Earth's gravity field which best fits
global mean sea level
S
a = Sem
CE 203
Principles and Practice of Geomatics
Traverse Layout
Control Stations and Lines
Traverse Stations and Lines
Side Shots
N
Inversed Lines
Q
P
J
A
K
R
S
B
C
E
Traverse Computations
Plane surveying
All distances, angles, and
directions are in the horiz
Duo: Aeaigrimeht la at the beginning of the rhiay lecture,
Liam- diiy it?) tiubhtlt assignment to noon "'"luomisy, mums, in room 1121 (Etiulornanl em 2
Center of Purdue Airport
Runway Intersection
Express geodetic coordinates to the nearest 0.1 s
CE 203 Principles and Practice of Geomatics
Homework Assignment 6, Fall 2013
Grade: 3 ' i l 10
Due: Assignment is due at the beginning of the Friday lecture, 1018-13.
Last day to submit assignment is Wednesday lecture, 102513.
(1 rats)
1. Use data gi
Observations and Error Theory
Observations
True Value = Meas. Value Error
Describe the Error By Source of Error: (Sect. 3.5)
Natural
Instrumental
Personal
By Behavior of Error: (Sect. 3.4 and 3.6)
Blunder a mistake, must discard or re-measure
Systematic
CE 203
Principles and Practice of Geomatics
Steven D. Johnson
4112 Civil Engr. Bldg.
494-0786
steven@purdue.edu
Please include lab number on all assignments and emails
CE 203
Principles and Practice of Geomatics
Course Content
Measurements - Field measure
Abstract
The purpose of this lab was to accurately define an engineering profile centerline, and plot a
typical plan and profile sheet. To accomplish this, the teams used an automatic level with a tripod, a level
rod, and a hand level to complete a level