Photogrammetry

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Photogrammetry is the art and science of obtaining reliable measurements by photography (metric photogrammetry) and qualitative evaluation of image data (photo interpretation). It includes use of terrestrial, close-range, aerial, vertical, oblique, strip, and space photographs along with their interpretation.

Scale formulas are as follows:

Photo scale=ab/AB=f/(H-h1)

where f =focal length of lens, in (m)

H =flying height of airplane above datum (usually mean sea level), ft (m)

h1 =elevation of point, line, or area with respect to datum, ft (m)

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Comments
  • nevin November 7, 2007 at 9:06 pm

    thanx

  • PAVITHRA August 12, 2008 at 7:43 am

    Will this kind of survey is useful as i know this is not used by many.

  • sivakumar kakarla January 17, 2009 at 5:47 am

    We need detailed information about Photogrammetry.

    Sivakumar Kakarla

  • Devjyoti June 9, 2009 at 7:14 pm

    what is the basic principle of photogrammetry?
    tell me how it is use with detail mathematical expression.

  • sayeed July 15, 2010 at 10:14 am

    how to find the complete notes of survey

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