# Is the datum conversion wrong?

**URL:** <https://community.pix4d.com/t/is-the-datum-conversion-wrong/8396>\
**Category:** PIX4Dmapper Questions/Troubleshooting\
**Created:** [May 24, 2019, 9:39am UTC](https://community.pix4d.com/t/is-the-datum-conversion-wrong/8396 "2019-05-24T09:39:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Terry\_Lam](https://avatars.discourse-cdn.com/v4/letter/t/57b2e6/32.png) [@Terry\_Lam](https://community.pix4d.com/u/Terry_Lam)\
**Post date:** [May 24, 2019, 9:39am UTC](https://community.pix4d.com/t/is-the-datum-conversion-wrong/8396/1 "2019-05-24T09:39:59Z")

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Hi there,&nbsp;

I went through the ‘datum\_shift.csv’ in the GDAL file of the program file. Surprisingly, I found that the conversion of HK Geodetic Datum to ITRF96 is different from the GOV publication. I would like to know if this is a problem…

Capture from the ‘datum\_shift.csv’ on the left VS the capture from GOV table 1

&nbsp;

Thanks a lot&nbsp;

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**Author:** ![Daniel\_Rico\_Cordero](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/daniel_rico_cordero/32/187_2.png) [@Daniel\_Rico\_Cordero](https://community.pix4d.com/u/Daniel_Rico_Cordero)\
**Post date:** [May 24, 2019, 1:10pm UTC](https://community.pix4d.com/t/is-the-datum-conversion-wrong/8396/2 "2019-05-24T13:10:32Z")

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Hello Terry,

Our recommendation is to convert your coordinates before using them in Pix4D.

This [community post](https://community.pix4d.com/t/3325--Desktop-Horizontal-grid-corrections-and-transformations) contains more information about it.

Regards.