# What is the local coordinate system

**URL:** https://community.pix4d.com/t/what-is-the-local-coordinate-system/11189
**Category:** PIX4Dmapper Questions/Troubleshooting
**Created:** [January 22, 2020, 9:37pm UTC](https://community.pix4d.com/t/what-is-the-local-coordinate-system/11189 "2020-01-22T21:37:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![yshi18](https://avatars.discourse-cdn.com/v4/letter/y/a9adbd/32.png) [@yshi18](https://community.pix4d.com/u/yshi18)
#### Post date: [January 22, 2020, 9:37pm UTC](https://community.pix4d.com/t/what-is-the-local-coordinate-system/11189/1 "2020-01-22T21:37:30Z")

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Hi,

 ![image](https://global.discourse-cdn.com/pix4d/original/2X/5/530bf13e79eac30f0cec7d5a9d99ae144fd67e85.png)

Could anyone kindly tell me that in the statement that “This information is used by computer vision users. The positions and rotations of the cameras are defined in a **local coordinate system**. In order to get the values in the definition mentioned in How are the Internal and External Camera Parameters defined? article, the rotation around the X-axis and the offset needs to be applied.”, what is the local coordinate system referring to? Camera coordinate (have z-axis point to camera) or body coordinate ( have z-axis point to scene )?

Any hint will be grateful.

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### Author: ![teodora.enache](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/teodora.enache/32/5811_2.png) [@teodora.enache](https://community.pix4d.com/u/teodora.enache)
#### Post date: [January 30, 2020, 9:41am UTC](https://community.pix4d.com/t/what-is-the-local-coordinate-system/11189/2 "2020-01-30T09:41:55Z")

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Hi Yeyin,

Maybe this community post matches your topic: [Problem in: back-projecting the densified point cloud into the original images](https://community.pix4d.com/t/problem-in-back-projecting-the-densified-point-cloud-into-the-original-images/8541)

Cheers,  
Teodora