# How to manually calibrate nongeo tagged images?

**URL:** <https://community.pix4d.com/t/how-to-manually-calibrate-nongeo-tagged-images/5072>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [January 17, 2016, 3:45pm UTC](https://community.pix4d.com/t/how-to-manually-calibrate-nongeo-tagged-images/5072 "2016-01-17T15:45:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Kushal\_K.C](https://avatars.discourse-cdn.com/v4/letter/k/e19adc/32.png) [@Kushal\_K.C](https://community.pix4d.com/u/Kushal_K.C)\
**Post date:** [January 17, 2016, 3:45pm UTC](https://community.pix4d.com/t/how-to-manually-calibrate-nongeo-tagged-images/5072/1 "2016-01-17T15:45:09Z")

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Hello, I have a set of terrestrial images of a structure taken from consumer grade camera. I tried to process them in pix4d mapper but only half of them were calibrated while the other half remained uncalibrated. Would anybody here please tell me how to manually select tie points calibrate these images.

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**Author:** ![Derrick\_Westoby](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/derrick_westoby/32/178_2.png) [@Derrick\_Westoby](https://community.pix4d.com/u/Derrick_Westoby)\
**Post date:** [January 25, 2016, 5:53pm UTC](https://community.pix4d.com/t/how-to-manually-calibrate-nongeo-tagged-images/5072/2 "2016-01-25T17:53:43Z")

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Hi Kushal.

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Try creating manual tie points and linking the uncalibrated images to the calibrated images using these.&nbsp;

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**Author:** ![Marc\_Desgroseilliers](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/marc_desgroseilliers/32/187_2.png) [@Marc\_Desgroseilliers](https://community.pix4d.com/u/Marc_Desgroseilliers)\
**Post date:** [February 17, 2016, 1:50pm UTC](https://community.pix4d.com/t/how-to-manually-calibrate-nongeo-tagged-images/5072/3 "2016-02-17T13:50:50Z")

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Dear Kushal, Derrick,

You can find the procedure to fix uncalibrated cameras here

[https://support.pix4d.com/hc/en-us/articles/202560189](https://support.pix4d.com/hc/en-us/articles/202560189)

However, if half of your images are not calibrated, there might be another underlying issue. For example, it could be that the overlap is not sufficient. If taking pictures in a circular fashion around the object, we recommend taking pictures every 5-10 degrees, for example.

Best regards,