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ce 4520

Terms in this set (58)

The latitude Function used for Equal Area Maps for Tax Assessors is :
Authalic Latitude
The latitude function used for the normal mercator projection is:
Isometric Latitude
The two kinds of systematic error in conformal map projections are:
scale factor

convergence angle
Sketch the relationship between ellipsoid, geoid, and topography
see picture
foundation for mapping
NAD 27 (North American Datum 1927)
Us coast and geodetic survey.

survey of the coast 1807
Us coast and geodetic survey. survey of the coast 1807
Ferdiand
Ferdinand hassler- Survey of the coast 1806, Triangulation and leveling
after ww2 Radar
Geodemeter (1948) 20-40 km in one day
What did the US airforce develop in 1980's
NAD83 HARN: statewide high accuracy reference networks
CORS
Continously operating reference stations
what will NAD83(Cors2011) develop in to
NAD2022
what datum did transit system use
WGS72
Developing process of datums
NAD27-NAD83-HARN-NAD83(CORS)-GEOCON22
Commander Warren Dewhurst
- 3 maps of US(phi lamda h)
-NAD27, NAD83
-created surface of minimmum curvature
MRE
Multiple regression equation (regions)
1 hr =
15 degress of lamda (longitude)
John Harrison
Invented Chronometer (longitude)
Brsa wolfe 7 parameter
no datum origin in equation
Molodensky 3 parameter
standard military
What are the national grid datums
NADCON, GEOCON, NT V.2
Rhum Line
Line of constant compass bearing
Heinrich Lambert:
1769, Isometric latitude (t) Tau
Azuthmal Projection
Oldest, all azimuths correct from a central point
Equal area projections
-Tax mapping
-Petroleum engineering if reservoirs
Conformal Projection
-Preserve angles and shapes
-uses (t) tau
Conformal projection types
Lamber conformal conic
Mercator(Normal Mercator)
Transverse Mercator
Oblique Mercator
Sterographic
The four projection use 2 sources of systematic error
-scale factor at a point (k or m)
-convergance angles as points ( theta or mu)
Grid dist=

Grid deltaz=
geodetic dist x k

geodetic deltaz - theta
Computing Geodetic distances ranked
Best: geodesic

Second best: Transverse Mercator

3rd best: lambert conformal conic
why apholytic projections are obsolete
scale factor at a point is a function of latitude, longitude, z
Normal Mercator is based on what
The basis of normal mercator is Isometric Latitude (t)
what are lease blocks used as
loxodromes
Name of the device at CAMD
Leica Laser tracker
What kind of device is the Leica Laser
Absolute Laser Interferometer
What is practiced at CAMD
Optical tooling - Ultra precise indoor surveying
Spacing gets larger going north and south for what projection
Normal Mercator
increased spacing is due to what?
Convergence of meridian
What are the straight lines on a NORMAL mercator projection
Loxodrome or Rhumline
2 projections used
-Mercator

-Gnomonic
Where does the Gnomonic begin
Center of earth
Straight line on a GNOMONIC projection is called?
Orthodrome
Geodesic meaning in regards to distance
Geodesic_ shortest distance between two points
Gnomonic Projection Drawing
...
Normal Mercator Drawing
...
Collimation
Looking through at crosshairs
How to perform collimation
Take outside andfocus on something far away (infinity)

Then you can focus the other lens on the first ones infinty
Auto Collimation drawing
...
What does the Jig transit not do
cant read angles
What does the jig transit use
Wedge (Optical Micrometer)
What is the jig and wedge used to measure
Vertical and Horizontal Deflections
Safety fairways are used as what
Ellipsoidal Loxodromes
Safety fairways are also called
Traffic Separation Schemes
Safety Fairways published in
CFR - Code of Federal Regulation
Safety Fairway was created by
Interior design
Safety fairways enforced by
Coast guard
Coordinates by
Corps of Engineers
Radius of Gausian Sphere is a function of
geodetic Latitude
LORAN-C (Long Range Navigation)
Hyperbolic Lattices
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