Horizontal and Vertical accurancy on Pix4d

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting
1

hi support.

Just want to ask what the use of the vertical and horizontal accuracy at image properties editor window?

the default value is 5m for horizontal and 10m vertical, when i change this value, it will give the result of RMS error…and what the standard value that suitable to use to process the photo.

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2

Hi Hulwan,

The accuracy that you set in the Image Properties Editor - Image Geolocations depend on the actual accuracy of the image geolocation and is, typically, defined as the accuracy of the GPS unit on the drone. 

There are 3 options:

  • Standard : Useful when having very accurate image geolocation. Sets the values to:

    • Accuracy Horz: 5m.
    • Accuracy Vert: 10m.

  • Low : Useful when having non accurate image geolocation. Sets the values to:

    • Accuracy Horz: 50m.
    • Accuracy Vert: 100m.

  • Custom : Allows to set other values or edit the accuracy of each individual image or of a group of images.

The higher the accuracy numerical value (m or ft), the less influence the image’s coordinates will have in the_ Initial Processing _compared to other images or GCPs with lower accuracy numerical values (m or ft). The accuracy is a value between 0.001 and 10’000. 

Best,