# 2d to 3d

**URL:** <https://community.pix4d.com/t/2d-to-3d/18282>\
**Category:** PIX4Dmapper\
**Created:** [May 27, 2021, 7:15pm UTC](https://community.pix4d.com/t/2d-to-3d/18282 "2021-05-27T19:15:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![m.sajadian.88](https://avatars.discourse-cdn.com/v4/letter/m/bc79bd/32.png) [@m.sajadian.88](https://community.pix4d.com/u/m.sajadian.88)\
**Post date:** [May 27, 2021, 7:15pm UTC](https://community.pix4d.com/t/2d-to-3d/18282/1 "2021-05-27T19:15:21Z")

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Hi,

I want to click a pixel in one image and find its 3D ground coordinates. Is it possible by pix4d? Or what are the equations of transformation from image space to ground space?

Best regards,

Maryam

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**Author:** ![Yuka](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@Yuka](https://community.pix4d.com/u/Yuka)\
**Post date:** [May 28, 2021, 6:36am UTC](https://community.pix4d.com/t/2d-to-3d/18282/2 "2021-05-28T06:36:33Z")

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Hello Maryam,

You can add MTPs to find the coordinates. For more information on how to add MTPs, please refer to the link below.

> **[How to add / import and mark manual tie points (MTPs) in the rayCloud](https://support.pix4d.com/hc/en-us/articles/202560349-How-to-add-import-and-mark-manual-tie-points-MTPs-in-the-rayCloud)**
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>  
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> Video: Watch the instructional video about manual tie points:
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> 
> An automatic tie point (ATP) is a 3D point corresponding to a keypoint that is automatically detected and matched in the images.A...

Kind regards,