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Checkerboard target type supported in 3Dsurvey

Checkerboard target type supported in 3Dsurvey

Checkerboard target type supported

Welcome to this 3Dsurvey tutorial!

In this guide, we’ll explore how to orientate your project using checkerboard ground control points (GCPs), a new feature in 3Dsurvey version 2.16, designed for faster and more accurate project alignment. 

Read more about what’s new in 2.16: https://3dsurvey.si/whats-new-in-3dsurvey-2-16-2/

Watch the Tutorial

Importing and Setting Up Checkerboard GCPs

  1. Import Images and Adjust Bundle
    Begin by importing images and completing the bundle adjustment.

  2. Setting GCP Orientation
    Click on the “Orientate with GCP” option, locate the file containing your GCP coordinates, and select “Import.” Set the target type to “checkerboard.”

  3. Checkerboard Dimensions
    Input the size of your checkerboard targets (e.g., 33 cm by 33 cm), then proceed to the target locating module.

Locating and Adjusting Checkerboard Targets

Once in the target locating module:

  • Mark the target centers manually, selecting as precisely as possible.
  • When three targets are identified, the software estimates the remaining GCP locations.
  • For fine-tuning, use the micro-adjustment feature, similar to circle targets.

Finalizing Accuracy

The detection algorithm in version 2.16 may require reactivation for accuracy. Click “Next” to view the final accuracy results. Your project is now oriented using checkerboard GCPs!

Thank you for following along, and see you in the next tutorial!

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