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Detection of the GCPs failed - PIX4Dcloud

This article describes common reasons why GCP detection can fail in PIX4Dcloud Pro and provides guidance on how to troubleshoot and resolve these issues.

Licenses: This feature is available only to PIX4Dcloud Pro licenses.

Roles: Only Owners, Managers, and Editors can process a dataset with GCPs.

Issue description / Cause

GCP detection may fail in PIX4Dcloud Pro if any of the following conditions occur:

  • Image or GCP requirements are not met (e.g., insufficient image quality, inadequate overlap, or missing targets).

  • Incorrect coordinate system or coordinate values are defined for the GCPs.

  • The specified target size does not match the diagonal of the GCP target, or it is defined in the wrong measurement unit.

  • The CSV geolocation file is incorrectly formatted. Formatting rules.

If any of these conditions are not satisfied, the algorithm may fail to detect and mark the GCPs in the project.

Possible solutions / Checks

  1. Verify image and GCP requirements: Ensure all images meet the quality and coverage requirements, and that GCP targets are visible and correctly placed.

  2. Check coordinate system and values: Confirm that the GCP coordinates are in the correct system and format.

  3. Validate target size: Ensure the size of each GCP target corresponds to the diagonal length and is in the proper unit of measurement.

  4. Review CSV geolocation file: Make sure the CSV file follows the required formatting rules for GCPs.

  5. Reprocess the dataset: Create a new dataset, remove or correct any conditions that caused the detection failure, and start processing again.