TOOLS - GSD calculator

Click HERE to download the tool in Excel format.
Click HERE to download the tool in Open Office format.

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11 comments

  • Centro Nacional de Prevención de Desastres


    We have a phantom 4 and I entered that      parameters as show in the picture, then we fly the drone and when we entered the flight height the app Pix4DCapture says GSD 5.5, so, the question is Why it does not say 0.77?

  • Holden (Pix4D)

    Hi there. The camera database has the focal length of the Phantom 4 as 3.61, not 20. can you input the correct focal length to see what value is produced?

  • Centro Nacional de Prevención de Desastres

    Ohh very thanks, now the value GSD is 4.27 It's ok?

  • Holden (Pix4D)

    The sensor width is also incorrect. The database has it as 6.3175. Where did you get these values from?

  • Centro Nacional de Prevención de Desastres

    I asked a DJI advisor, I also saw it in the following table:

    According to the specifications on the official DJI page the sensor is 1 / 2.3"

  • Holden (Pix4D)

    I dont see the P4 on the list. Do you have any documentation that shows that size?

    Edited by Holden (Pix4D)
  • Centro Nacional de Prevención de Desastres

    I do not have a document of that information because the advice was an online chat of DJI support but if necessary I ask for it again by mail to justify the parameter

  • Spiros Arethas
  • Holden (Pix4D)

    Those refer to the Phantom 4 Pro. The above is in relation to the Phantom 4 which has a different sensor. 

  • Centro Nacional de Prevención de Desastres

    I have that:

    and I have that:

  • Holden (Pix4D)

    One of my smart colleagues had the answer. Thanks, Andrew!

    "The 20 mm focal length that DJI reports in the camera's specifications is the 35 mm equivalent focal length. The camera's actual focal length is significantly smaller than 20 mm because the camera's sensor is smaller than a standard 35 mm sensor"

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