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Flight Planning

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Flight Planning. Planning for aerial photography is critical to the success of projects. ... Crop calendar (plant phenology). Sun angle effects. Other Specifications ... – PowerPoint PPT presentation

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Title: Flight Planning


1
Flight Planning
  • Planning for aerial photography is critical to
    the success of projects.
  • Many people use photographs obtained for some
    other purpose, simply to avoid costs of planning
    and acquisition.

2
Flight Planning
  • Federal agencies provide general use
    photographs that need to be evaluated with
    project objectives in mind.
  • Objectives of the project determine procedures.
  • Must know primary use of the photographs.

3
Flight Planning
  • Most critical factor in aerial photography is the
    weather.
  • Many areas of the world have but few cloud free
    days.
  • Most photography flown between 10am and 2pm local
    solar time.
  • Avoids long shadows.
  • Prime time for puffy white clouds.

4
Flight Planning
  • Settles critical issues
  • Where is project area?
  • How many photos needed to cover the area at
    desired scale and resolution.
  • When is the target in desirable condition?
  • Is stereo viewing necessary?
  • Are quantitative reflectance standards necessary?

5
Flight Line Spacing
6
Photograph Spacing
7
Geometric Factors
  • Focal length of the camera lens
  • Camera/film format size
  • Photo scale
  • Size of area to be photographed
  • Average elevation of the ground
  • Overlap required?
  • Sidelap required?
  • Ground speed of the aircraft

8
Geometric Factors
  • Flying height above datum
  • H(PSRcfl)havg
  • Location, direction, and number of flight lines
  • Ground coverage, CPSR(size of photo)
  • Ground separation of photo centers if 40 advance
    needed is C0.4

9
Geometric Factors
  • Time interval between exposures
  • 2300m/photo x 3600sec/hr 51sec
  • 160km/hr 1000m/km
  • Number of exposures per line
  • Total number of exposures

10
Other Specifications
  • Mission timing-critical for most photography.
  • Crop calendar (plant phenology).
  • Sun angle effects.

11
Other Specifications
  • Ground control requirements.
  • Precise elevations for topography maps.
  • Camera calibration requirements.
  • Cfl calibrated focal length, used for
    topography projects.

12
Looking in Stereo
13
Looking in Stereo
14
Looking in Stereo
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