2. OUTLINE
• Geodesy and Space-Geodesy
• What is Geodesy ?
• Historical perspective
• Space-based technologies
• Applications
• Selected books on Geodesy
• References
3. GEODESY ?
• One of the oldest profession of the world.
• It comes from the words:
Geo = Earth
Daisia = I divide
• Geo Daisia = Dividing the Earth
4. DEFINITION OF GEODESY
• The classical definition:
Geodesy is the science of measuring, and portraying the
earth’s surface.
[Helmert, 1880].
• The modern definition:
Robert
Helmert
(1843 - 1917)
Geodesy is discipline that deals with the measurement and
representation of the earth, including it’s gravity field, in a
3D time varying space.
(International Association of Geodesy)
5. HISTORICAL PERSPECTIVE
• Eratostethens (276 BC – 194 BC) measured the angle of
sun rays between Alexandria and Syene (Egypt).
• Measured the Earth’s circumference accurately with
15% deviation as compared to the current estimate.
6. SUB-DISCIPLINES OF GEODESY
• Geometrical Geodesy
• Dynamical Geodesy
• Mathematical Geodesy
• Space or Satellite Geodesy
• Marine Geodesy
• Etc.
7. SATELLITE GEODESY
• Geodesy with the help of Satellites.
• It is used to study the climate change, water
resources, natural hazards, disasters, etc.
21. SELECTED BOOKS ON
GEODESY
GEODESY: THE
CONCEPTS
by Peter Vanicek, E.J.
Krakiwsky,
Elsevier Science, 1996 Edition
GEODESY
by Wolfgang Torge, Alter de
Gruyter, Berlin, 2000
INTRODUCTION TO GEODESY:
The History and Concepts of
Modern Geodesy
by James R. Smith - 1997
SATELLITE GEODESY,
FOUNDATIONS,
METHODS, AND
APPLICATIONS,
by Gunter Seeber, Walter de
Gruyter, Berlin, 2003
