# Issue with GCP's

**URL:** <https://community.pix4d.com/t/issue-with-gcps/18874>\
**Category:** PIX4Dmapper\
**Created:** [July 7, 2021, 10:10am UTC](https://community.pix4d.com/t/issue-with-gcps/18874 "2021-07-07T10:10:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![james3](https://avatars.discourse-cdn.com/v4/letter/j/b5e925/32.png) [@james3](https://community.pix4d.com/u/james3)\
**Post date:** [July 7, 2021, 10:10am UTC](https://community.pix4d.com/t/issue-with-gcps/18874/1 "2021-07-07T10:10:16Z")

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Hi there

I am trying to process a site I captured with my drone and I completed the first stage as well as imported my GCP’s but the GCP’s are above my generated site as can be seen in the image and now because of this I cant select them in any of the images. Please help! I’m not sure if its a issue with my processing or a issue with the GCP’s ?

 ![Capture](https://global.discourse-cdn.com/pix4d/original/2X/5/52f1fe3b692da19a7d18b2a74c58b8dc900dcb64.jpeg)

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**Author:** ![till](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/till/32/3151_2.png) [@till](https://community.pix4d.com/u/till)\
**Post date:** [July 7, 2021, 11:16am UTC](https://community.pix4d.com/t/issue-with-gcps/18874/2 "2021-07-07T11:16:29Z")

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If the horizontal positioning of the images isn’t to far away from the GCPs, you could easily use the Basic GCP/MTP Editor and mark a few GCP (maybe in each corner of the project area). This should approximately fit your Automatic Tie Points near to the GCPs.

> **[How to add / import GCPs in the Basic GCP/MTP Editor](https://support.pix4d.com/hc/en-us/articles/202560099-How-to-add-import-GCPs-in-the-Basic-GCP-MTP-Editor)**
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>  
> 
> Important:
> 
> These step-by-step instructions are part of the procedure of how to include GCPs in the project. For more information about how to include GCPs in the project: How to include GCPs in...

Then reoptimize your project and mark the rest of your GCPs in the raycloud. Of course you may also want to reoptimize your already clicked GCPs.

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**Author:** ![james3](https://avatars.discourse-cdn.com/v4/letter/j/b5e925/32.png) [@james3](https://community.pix4d.com/u/james3)\
**Post date:** [July 7, 2021, 3:34pm UTC](https://community.pix4d.com/t/issue-with-gcps/18874/3 "2021-07-07T15:34:12Z")

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Thanks very much for that!! I will give that a shot!!

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**Author:** ![Christina](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/christina/32/303_2.png) [@Christina](https://community.pix4d.com/u/Christina)\
**Post date:** [July 9, 2021, 7:59am UTC](https://community.pix4d.com/t/issue-with-gcps/18874/4 "2021-07-09T07:59:28Z")

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this can also help:

> **[Vertical shift between the model and the GCPs / Cannot mark the GCPs in the...](https://support.pix4d.com/hc/en-us/articles/206544136-Vertical-shift-between-the-model-and-the-GCPs-Cannot-mark-the-GCPs-in-the-rayCloud)**
>
> Error
> The rayCloud displays the Ground Control Points (GCPs), in blue, far above or below the model. The GCPs do not align with the images and the model.
> 
> Description
> After running step 1. Initial ...

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**Author:** ![james3](https://avatars.discourse-cdn.com/v4/letter/j/b5e925/32.png) [@james3](https://community.pix4d.com/u/james3)\
**Post date:** [July 9, 2021, 8:45am UTC](https://community.pix4d.com/t/issue-with-gcps/18874/5 "2021-07-09T08:45:07Z")

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Thanks very much for the tips!! That is very good to know!! I managed to come right thankfully.