---
title: Options for Establishing a Known Point and Obtaining Ground Control Points (GCPs)
description: Here are our recommended methods for defining your known point needed to tie your point cloud to Earth for accuracy.
---

[Skip to content](https://learn.rockrobotic.com/ways-to-establish-a-known-point-or-capture-ground-control-points-gcps#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 R2A & R360](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en)
3. [Data Collection](https://learn.rockrobotic.com/rock-r2a-r360?hsLang=en#data-collection)

March 22, 2023

# Options for Establishing a Known Point and Obtaining Ground Control Points (GCPs)

## Here are our recommended methods for defining your known point needed to tie your point cloud to Earth for accuracy.

                      

1. Capture the points with your EMLID via the ROCK Base Network  
     - [https://learn.rockrobotic.com/how-to-view-the-rock-rtk-base-map](https://learn.rockrobotic.com/how-to-view-the-rock-rtk-base-map?hsLang=en)
     - [Buy a ROCK Base Station HERE!](https://www.rockrobotic.com/store/ROCK-Triple-Band-GNSS-Network-Base-Station-GPS-GNSS-node-p520830299)
2. Get the points from a Registered Land Surveyor  
     - Make sure they provide you with the point that you'll set the Reach up on in Latitude/Longitude and Ellipsoidal Height (including the coordinate reference system they collected the point in).
3. Capture the points with your EMLID via an NTRIP Network 
     - [https://learn.rockrobotic.com/getting-a-known-point-from-an-ntrip-provider](https://learn.rockrobotic.com/getting-a-known-point-from-an-ntrip-provider?hsLang=en)
4. Log data for use in an OPUS processing solution  
     - [https://learn.rockrobotic.com/how-to-compute-opus-for-pcmaster ](https://learn.rockrobotic.com/how-to-compute-opus-for-pcmaster )

- [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.