---
title: Why Aren't My GCPs Lining Up?!
description: TL;DR An incorrect CRS (Coordinate Reference System) is the the most likely culprit. 
---

[Skip to content](https://learn.rockrobotic.com/why-arent-my-gcps-all-lining-up-to-my-data#main-content)

English

Show submenu for translations

![ROCK-robotic-community-logo.png\]](https://learn.rockrobotic.com/hs-fs/hubfs/ROCK-robotic-community-logo.png?width=250&height=50&name=ROCK-robotic-community-logo.png)

- [ROCK Customer Support](https://www.rockrobotic.com/support/)

Open main navigation

Close main navigation

- [ROCK Customer Support](https://www.rockrobotic.com/support/)
- English
  
  Show submenu for translations
- [www.rockrobotic.com](https://www.rockrobotic.com/)

[www.rockrobotic.com](https://www.rockrobotic.com/)

 Hello. How can we help you?

- There are no suggestions because the search field is empty.

1. [ROCK Knowledgebase](https://learn.rockrobotic.com/?hsLang=en)
2. [ROCK Cloud](https://learn.rockrobotic.com/rock-cloud?hsLang=en)
3. [Managing Projections](https://learn.rockrobotic.com/rock-cloud?hsLang=en#managing-projections)

June 14, 2024

# Why Aren't My GCPs Lining Up?!

## TL;DR An incorrect CRS (Coordinate Reference System) is the the most likely culprit.

1\. Start with your CRS- Double check - is your CRS in the correct projection? 

![crs](https://learn.rockrobotic.com/hs-fs/hubfs/crs.png?width=276&name=crs.png)

For data collected with  ROCK Hardware, the CRS should always be the UTM zone in which your project is located. 

Here's a map to see which one you should use: [https://mangomap.com/robertyoung/maps/69585/what-utm-zone-am-i-in-#](https://mangomap.com/robertyoung/maps/69585/what-utm-zone-am-i-in-#)

Tip: If you upload your LAS/LAZ file, Rock Cloud will try to auto detect the UTM zone / projection and suggest it when you are choosing your CRS in a new project.  

 

Once your CRS is good to go, you are ready to start [aligning your project to your GCPs](https://learn.rockrobotic.com/how-to-align-project-to-ground-control-points?hsLang=en)!

 

 

2\. If this does not solve your problem, contact Rock Support at support@rockrobotic.com

- [ROCK R3 Pro](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#main-content)

    - [Setup](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#setup)
    - [Data collection](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#data-collection)
    - [Updates and Maintenance](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#updates-and-maintenance)
    - [Mobile Mount](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#mobile-mount)
    - [Photogrammetry](https://learn.rockrobotic.com/rock-r3-pro?hsLang=en#photogrammetry)
- [ROCK Desktop](https://learn.rockrobotic.com/rock-desktop?hsLang=en#main-content)

    - [Desktop Processing](https://learn.rockrobotic.com/rock-desktop?hsLang=en#desktop-processing)
    - [Using ROCK Desktop](https://learn.rockrobotic.com/rock-desktop?hsLang=en#using-rock-desktop)
    - [Desktop License](https://learn.rockrobotic.com/rock-desktop?hsLang=en#desktop-license)
    - [Desktop Support](https://learn.rockrobotic.com/rock-desktop?hsLang=en#desktop-support)
    - [Releases](https://learn.rockrobotic.com/rock-desktop?hsLang=en#releases)
- [ROCK Cloud](https://learn.rockrobotic.com/rock-cloud?hsLang=en#main-content)

    - [Overview](https://learn.rockrobotic.com/rock-cloud?hsLang=en#overview)
    - [Project Data](https://learn.rockrobotic.com/rock-cloud?hsLang=en#project-data)
    - [Managing Projections](https://learn.rockrobotic.com/rock-cloud?hsLang=en#managing-projections)
    - [ROCK Cloud Tools](https://learn.rockrobotic.com/rock-cloud?hsLang=en#rock-cloud-tools)
    - [Processing](https://learn.rockrobotic.com/rock-cloud?hsLang=en#processing)
    - [Deliverables & Exports](https://learn.rockrobotic.com/rock-cloud?hsLang=en#deliverables-exports)
    - [General](https://learn.rockrobotic.com/rock-cloud?hsLang=en#general)
- [ROCK SLAM](https://learn.rockrobotic.com/rock-slam?hsLang=en#main-content)

    - [SLAM Hardware](https://learn.rockrobotic.com/rock-slam?hsLang=en#slam-hardware)
    - [SLAM Data Collection](https://learn.rockrobotic.com/rock-slam?hsLang=en#slam-data-collection)
    - [ROCK Colorized SLAM Dock V2](https://learn.rockrobotic.com/rock-slam?hsLang=en#rock-colorized-slam-dock-v2)
    - [SLAM Data Alignment](https://learn.rockrobotic.com/rock-slam?hsLang=en#slam-data-alignment)
- [ROCK Base Station](https://learn.rockrobotic.com/rock-base-station?hsLang=en#main-content)

    - [ROCK Base Setup](https://learn.rockrobotic.com/rock-base-station?hsLang=en#rock-base-setup)
    - [ROCK Network](https://learn.rockrobotic.com/rock-base-station?hsLang=en#rock-network)
    - [Base Data](https://learn.rockrobotic.com/rock-base-station?hsLang=en#base-data)
- [ROCK Deliverables](https://learn.rockrobotic.com/rock-deliverables?hsLang=en#main-content)

    - [Deliverables](https://learn.rockrobotic.com/rock-deliverables?hsLang=en#deliverables)
    - [Ordering](https://learn.rockrobotic.com/rock-deliverables?hsLang=en#ordering)
    - [Processing](https://learn.rockrobotic.com/rock-deliverables?hsLang=en#processing)
- [General Knowledge](https://learn.rockrobotic.com/general-knowledge?hsLang=en#main-content)

    - [ROCK](https://learn.rockrobotic.com/general-knowledge?hsLang=en#rock)
    - [Drones](https://learn.rockrobotic.com/general-knowledge?hsLang=en#drones)
    - [GPS / GNSS](https://learn.rockrobotic.com/general-knowledge?hsLang=en#gps-gnss)
    - [LiDAR](https://learn.rockrobotic.com/general-knowledge?hsLang=en#lidar)
    - [Surveying](https://learn.rockrobotic.com/general-knowledge?hsLang=en#surveying)
- [ROCK R2A & R360](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#main-content)

    - [Hardware](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#hardware)
    - [Data Collection](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#data-collection)
    - [Aerial Data Capture](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#aerial-data-capture)
    - [Creating Orthomosaics](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#creating-orthomosaics)
- [What's New](https://learn.rockrobotic.com/whats-new?hsLang=en)
- [Sales](https://learn.rockrobotic.com/sales?hsLang=en)
- [ROCK Ultra](https://learn.rockrobotic.com/rock-ultra?hsLang=en#main-content)

    - [Setup](https://learn.rockrobotic.com/rock-ultra?hsLang=en#setup)
    - [Data Collection](https://learn.rockrobotic.com/rock-ultra?hsLang=en#data-collection)
    - [Settings](https://learn.rockrobotic.com/rock-ultra?hsLang=en#settings)

[![Chill listening crop-3](https://learn.rockrobotic.com/hs-fs/hubfs/ROCK-robotic-community-logo-1.png?width=120&height=24&name=ROCK-robotic-community-logo-1.png "Chill listening crop-3")](http://rockrobotic.com)

rockrobotic.com Help Center

Copyright © 2026, ROCK Robotic Inc.