2. INTRODUCTION OF PHOTOGRAMMETRY
DEFINITION OF PHOTOGRAMMETRY
Photogrammetry is the art and science of obtaining reliable
information about the properties of surfaces and objects
without physical contact with the objects, and of
measuring and considering this information.
TERMINOLOGY
'photo' - light
'gram' - drawing
'metry' - measurement
4. DEVELOPMENT CYCLE OF
PHOTOGRAMMTRY
Plane table photogrammetry,from about 1850 to
1900,
Analog photogrammetry, from about 1900 to
1960,
Analytical photogrammetry,from about 1960 to
present,
Digital photogrammetry, which is just
beginning to be a presence in the
photogrammetric industry.
5.
6. What is CCD CAMERAS?
CCD means Charge Coupled Device.
7. HISTORICAL REVIEW
OF PHOTOGRAMMETRY
2ndhalf of the 19thcentury
(1850), people did terrestrial
photography& perspective
drawings.
perspective drawings: Drawn
solid objects in 2D surface &
obtained the right impression
of relative
positionsPerspective Perspective
Drawings
Terrestrial
Photograph
8. REVIEW CONT…
At the end of 19thcentury
France & Austrian people
used balloons to take photos
from air and produced air
photo maps. The geometry of
maps
were distorted.
Reason:
Tilt, irregular exposure,
unstable platform
9. BRIEF HISTORY ON
PHOTOGRAMMETRY
1480: The origin of
photogrammetry goes back
as far as 1480 when
Leonardo da Vinci
developed the concept of
perspective and projective
geometry.
1625: French
mathematician Desargues
defines projective
geometry generalizing the
use of vanishing points.
10. HISTORY CONT…
1840: The first use of
photogrammetry was by
the French geodesist
Arago using a process
called Daguerreotype.
1849: Frenchman
Laussedat referred to as
the “father of
photogrammetry” was the
first person to use
terrestrial photographs for
topographic map
compilation.