March 17, 2016

Planning: Geospatial (GSD) Swath & Pixel Density Calculator

Use our Geospatial Calculator (swath and pixel density)

Enter the values for your aerial imaging project, then press the Calculate button to obtain values that will inform your flight plans.

     
    

Sensor

Select Camera:
or enter sensor data below…



Overlap


Common digital camera sensor sizes : sensor dimension chart
Popular Canon & Nikon sensor resolution and dimensions Canon & Nikon sensor chart
Or refer to your camera’s technical specifications to find the sensor resolution (pixels) and dimension (mm).
When imaging a large area, it’s a good idea to plan your altitude and flight paths in order to:

  • Capture the desired resolution needed
  • Make sure that you have enough overlap in your photos
  • Know your maximum ground speed so that you do not reduce the overlap percentage by flying too fast
  • Keep your aircraft straight and level
  • Have a Plan B – Check the weather for prevailing winds and map out two different headings. Once you’re on station, you can figure out which plan to use depending on the wind direction.