Geometric Geodesy Lesson 1.1: Intro to Geodesy

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1
Geodesy is the science of measurement , including what?
Terrestrial, external gravity field determination
2
What are the classifications of satellites?
Artificial and Natural Satellites
3
Refers to the actual force exerted due to gravity between two specific masses.

It has a magnitude and direction, so it’s a vector quantity.
Gravitational Force
4
Refers to the phenomenon or field itself — the natural attraction that pulls objects with mass toward each other.

It is a property of nature described by Newton’s law of gravitation and Einstein’s theory of general relativity.
Gravity
5
What are the Key elements of Geodesy?
Measurement: Quantifying Eart as a size/shape
geometry: modelling as an Ellipsoid
Gravity: accounting for gravitation variation
6
What scale does it operate?
Planetary Scale
7
What Instrument measures Gravity?
Gravimeter
8
What does Geodesy mean?
Dividing the earth
9
What does "desa" mean?
divide
10
What is the earth model used in Geodesy ?
Curved (Ellipsoid, Geoid)
11
What is the Earth model used in Surveying?
flat (plane/Geometry)
12
What are the tools used in Geodesy?
GNSS, gravimeter
13
What instruments are used in surveying?
Optical tape
14
What is the accuracy requirement in Geodesy?
cm to mm level
15
What is the accuracy requirement in surveying?
cm level
16
What law allowed for the adoption of the Philippine Reference System of 1992(PRS 92) as the standard Reference System for surveys and mapping?
Executive Order No.45
17
What does geodesy make simple?
It makes extent dimension, vertical definition, and positioning easier
18
What is a sample application of GEodesy?
Space tech, Geo science REsearch, Disaster Prevention, Environmental Monitoring
19
What are the major classification of Geodesy?
Geometrical Geodesy
Physcial Geodesy
Satellite Geodesy
Astronomical Geodesy
20
It encompasses the three-dimension (3D) geometrical
elements of the ellipsoidal model of the Earth and the location of
points relative to a specific model
Geometrical Geodesy
21
What does Geometric Geodesy utilize in studying the shape and size of the earth?
Geometric Methods
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