# GCPs

**URL:** <https://community.pix4d.com/t/gcps/19051>\
**Category:** PIX4Dreact Questions/Troubleshooting\
**Created:** [July 20, 2021, 12:41pm UTC](https://community.pix4d.com/t/gcps/19051 "2021-07-20T12:41:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![scott.tiller](https://avatars.discourse-cdn.com/v4/letter/s/b19c9b/32.png) [@scott.tiller](https://community.pix4d.com/u/scott.tiller)\
**Post date:** [July 20, 2021, 12:41pm UTC](https://community.pix4d.com/t/gcps/19051/1 "2021-07-20T12:41:16Z")

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Good Morning -

I am a new user of PIX4Dreact and have a question related to GCPs. On occasion, I have the need to build a project image and provide information related to the accuracy of the image. Does PIX4Dreact allow for the integration of GCPs and Control Points? If so, can you please provide documentation and/or workflow? If GCPs and Control Points are not an option, do you have any suggestions on generating a more accurate image and/or determine the overall accuracy of the generated image?

Thanks, SAT

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**Author:** ![Kapil\_Khanal](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/kapil_khanal/32/304_2.png) [@Kapil\_Khanal](https://community.pix4d.com/u/Kapil_Khanal)\
**Post date:** [July 21, 2021, 9:31pm UTC](https://community.pix4d.com/t/gcps/19051/2 "2021-07-21T21:31:24Z")

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Hello @scott.tiller, At this time PIX4Dreact doesn’t support GCPs and Control Points. The accuracy of the map depends upon drone GPS so, if you can use an RTK drone then the map accuracy would be better.

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**Author:** ![scott.tiller](https://avatars.discourse-cdn.com/v4/letter/s/b19c9b/32.png) [@scott.tiller](https://community.pix4d.com/u/scott.tiller)\
**Post date:** [July 21, 2021, 10:46pm UTC](https://community.pix4d.com/t/gcps/19051/3 "2021-07-21T22:46:21Z")

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Understood - thank you for the clarification…

Thanks, SAT