M.R.Rifas Ahamed

Faculty of Geomatics

Sabaragamuwa University of Sri Lanka

What is Photogrammetry?

Photogrammetry is the 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.

The name “photogrammetry" is derived from the three Greek words

Photos:- Light Gramma:- Letter or something drawn Metrein:- to Measurecalled:- “Light engrave data measuring”

Leonardo da Vinci Johan Heinrich Lambert

Albrecht Duerer J. N. Niepce

Jacques Daguerre

Dominique François Jean Arago

Aimé Laussedat medal

The developments in photogrammetry,from around 1850, have followed four development cycles [Konecny, 1985]. Each of these periods extended about fifty years. These cycles include:

Plane Table PhotogrammetryPlane table photogrammetry, from about 1850 to 1900,Analog PhotogrammetryAnalog PhotogrammetryUsing optical, mechanical and electronical components, and where the

images are hardcopies. Re-creates a 3D model for measurements in 3D space

Analytical PhotogrammetryAnalytical PhotogrammetryThe 3D modelling is mathematical (not re-created) and measurements are

made in the 2D imagesDigital PhotogrammetryDigital PhotogrammetryAnalytical solutions applied in digital images. Can also incorporate

computer vision and digital image processing techniques.or Softcopy Photogrammetry”Softcopy” refers to the display of a digital image, as opposed to a

”hardcopy” (a physical, tangible photo).

Leonardo da Vinci French mathematician Desargues

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.

French geodesist AragoFrenchman Laussedat

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.

Nadar obtaining

photography from a balloon.Italian geodesist Porro

1858: The first aerial photogrammetry was tested by Laussedat using kites and in 1862 using balloons.

1865: Italian geodesist Porro designed the photogoniometer, this development is significant in photogrammetry because of its application in removing lens distortion.

Meydenbauer Canadian Surveyor general Deville

1893: Meydenbauer was the first person to use the term “photogrammetry”.

1896: Canadian Surveyor general Deville created the stereo-planigraph: the first stereoscopic-plotting instrument.

Wright brothers Italian Captain Cesare Tardivo

1903: Airplane invented by Wright brothers

1908: The first aerial photography captured from a plane for mapping purposes was done by Italian Captain Cesare Tardivo

THANK YOU…