Question by A. Nissa: What is the advantages and disadvantages of photogrammetry mapping versus satellite mapping.?
Regardless of whether photogrammetry mapping are better than satellite mapping.
Finest answer:
Answer by Cap10
Photogrammetry mapping generally does not have the same limitations when it comes to climate. You just pick yet another day to try to map. It is also a lot much less high-priced, can be far more detailed. And can be completed in conjunction with other equipment.
Satellite mapping can give you excellent resolution when there is not clouds and can map locations that would other smart be inaccessible.
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Question by mapompana: How is photogrammetry utilized to analyse schlieren photos?
Can somebody please give me a detailed explanation of how photogrammetry is utilised to analyse photos taken for the duration of wind tunnel testing more than speeds above mach1
Ideal answer:
Answer by sr_engr
Schlieren is great only for axisymmetric or 2d flows. Its main purpose is visualization.
A far better tool for high speed, high accuracy, velocimetry is DPIV (digital pulse image velocimetry).
http://darwin.bio.uci.edu/~edrucker/house/dpiv.htm
http://www.ahd.tudelft.nl/~jerry/publications/1993Westerweel.htm
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