ABSTRACT
Photogrammetry can be described as the science of obtaining reliable measurements by means of photographs. The 'father of photogrammetry' is generally accepted to be the Frenchman Aimé Laussedat, who pioneered terrestrial photogrammetry for architectural recording around 1860 . Towards the end of the 19 th century, terrestrial photogrammetric techniques were applied to alpine and glacier mapping. Around 1900 , a number of important developments took place in instrument design, including the production of the first stereocomparator https://www.w3.org/1998/Math/MathML"> ( 7.5,8.5 ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429078019/d26f7473-eed7-4ac2-ba97-6250e40102bb/content/eq1201.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> in 1901, and the first analogue stereoplotting instruments for use with terrestrial photographs in 1908. World War I, with the resulting rapid developement of aircraft, caused a shift in emphasis to aerial photogrammetry, using air photographs for reconnaissance and mapping. The first analogue stereoplotting instrument https://www.w3.org/1998/Math/MathML"> ( 7.3,8.5 ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429078019/d26f7473-eed7-4ac2-ba97-6250e40102bb/content/eq1202.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> for aerial mapping was developed in 1921, and the use of terrestrial photogrammetry became restricted to specialist applications.
