Results 251 to 260 of about 179,801 (303)
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Journal of Navigation, 1950
In his Presidential Address to the Institute this year the Astronomer Royal, Sir Harold Spencer Jones, stresses the importance of an early resumption of the general survey of the Earth's magnetic field and developments in airborne magnetometers in the United States have suggested the possibility of using aircraft for this purpose.
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In his Presidential Address to the Institute this year the Astronomer Royal, Sir Harold Spencer Jones, stresses the importance of an early resumption of the general survey of the Earth's magnetic field and developments in airborne magnetometers in the United States have suggested the possibility of using aircraft for this purpose.
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2017
The aim of this chapter is to provide a general overview about the main components of a developed UAS mapping system, the survey, and processing procedure. At first (4.1), a brief introduction is given about basic operational elements and accessories of UAS.
Gergely Szabó +5 more
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The aim of this chapter is to provide a general overview about the main components of a developed UAS mapping system, the survey, and processing procedure. At first (4.1), a brief introduction is given about basic operational elements and accessories of UAS.
Gergely Szabó +5 more
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The Journal of Wildlife Management, 1977
Sampling procedures appropriate to aerial survey were compared firstly in terms of the statistical efficiency and secondly according to their operational practicality. Sampling without replacement is more precise than sampling with replacement, but it requires a standard of navigation often impossible to achieve in practice.
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Sampling procedures appropriate to aerial survey were compared firstly in terms of the statistical efficiency and secondly according to their operational practicality. Sampling without replacement is more precise than sampling with replacement, but it requires a standard of navigation often impossible to achieve in practice.
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Repeatability of aerial surveys
Australian Zoologist, 1999In order to monitor population trends through space and time, aerial surveys need to provide density estimates that are a constant proportion of the true population density and are therefore repeatable. Previous work has identified factors that affect the visibility of kangaroos from fixed-wing aircraft and the relative contribution of these factors to
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The Photogrammetric Record, 1986
AbstractDuring 1985, the opportunity arose to make some test flights with the Wild RC10A and the Zeiss (Oberkochen) RMK A 15/23 with forward motion compensation. This paper outlines the changes incorporated in modern cameras, summarises the Ordnance Survey's photogrammetric tasks, describes the test flights which were achieved and illustrates the ...
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AbstractDuring 1985, the opportunity arose to make some test flights with the Wild RC10A and the Zeiss (Oberkochen) RMK A 15/23 with forward motion compensation. This paper outlines the changes incorporated in modern cameras, summarises the Ordnance Survey's photogrammetric tasks, describes the test flights which were achieved and illustrates the ...
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The Photogrammetric Record, 2003
AbstractAerial photography for archaeology has been developing its approaches and techniques over the past 100 years so that it now integrates the results of reconnaissance with extensive interpretative and analytical surveys. This paper introduces the philosophy and approach of the English Heritage (EH) Aerial Survey team, covering aerial ...
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AbstractAerial photography for archaeology has been developing its approaches and techniques over the past 100 years so that it now integrates the results of reconnaissance with extensive interpretative and analytical surveys. This paper introduces the philosophy and approach of the English Heritage (EH) Aerial Survey team, covering aerial ...
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The Journal of Wildlife Management, 1974
Aerial censuses of large mammals are inaccurate because the observer misses a significant number of animals on the transect. The accuracy deteriorates progressively with increasing width of transect, cruising speed, and altitude. Methods of eliminating bias by refining techniques are discussed and rejected; there seems to be no technical solution.
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Aerial censuses of large mammals are inaccurate because the observer misses a significant number of animals on the transect. The accuracy deteriorates progressively with increasing width of transect, cruising speed, and altitude. Methods of eliminating bias by refining techniques are discussed and rejected; there seems to be no technical solution.
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