You can upload Ground Control Points (GCPs) to a project in SDX-Cloud to improve georeferencing accuracy for drone-based datasets and other manual imports. Make sure your GCP file and physical target measurements are correct before you import them.
Summary
This article explains how to upload Ground Control Points (GCPs) into a project in SDX-Cloud. GCPs improve georeferencing by anchoring your dataset to real-world coordinates when they are configured correctly.
When processing drone-based datasets or other manual imports in SDX-Cloud, you can add GCPs to improve spatial accuracy and help your output match real-world conditions more closely.
Prerequisites
Make sure you have the following ready:
- A project in SDX-Cloud
- A GCP CSV file containing the required information: Easting, Northing, and Elevation
- Black and white checkerboard targets used on-site
- The exact diagonal length of the physical target you used
Upload GCPs
Use the tutorial below to upload black and white Ground Control Points (GCPs) to a project:
Update GCPs in your project
Each project in SDX-Cloud can have only one active set of GCPs at a time. When you import a new GCP file, the previous set is automatically deactivated. Older GCPs remain in the project history for documentation and traceability.
Important notes
- Do not guess the diagonal length. Measure it accurately in millimeters.
- Make sure the GCPs are visible in the uploaded imagery, such as drone images.
- You can upload GCPs independently for each import. This means you can use different GCPs for different datasets within the same project.
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