Editing Custom Coordinates in the GCP Tool
Q: Can I directly edit custom coordinates in the GCP tool after uploading a CSV?
A: Currently, the GCP tool does not support in-app editing of custom coordinates. If you need to make changes to any of the coordinates, you will need to re-upload the entire CSV file with the corrected values.
Q: Why do I need to re-upload the CSV instead of editing a single point?
A: This is due to a current limitation in the GCP tool, which doesn’t support manual editing of uploaded custom coordinate values. We understand this creates additional steps, and our team is reviewing improvements to streamline this workflow in the future.
Q: Are there different templates for GCP files depending on whether a custom grid is used?
A: Yes. The correct format of your GCP CSV file depends on whether your project is using a project-level custom grid or not.
-
If you’re using a custom grid, make sure your GCP file aligns with the expected format that includes the custom coordinate fields.
-
If you’re not using a custom grid, your GCP file should follow the standard template format without additional custom grid references.
Minimum Number of GCPs Required for Custom Coordinate CSV Upload
Q: Why did my custom coordinate CSV file fail to upload?
A: The upload may fail if your CSV file contains fewer than the 4 which is the required number of Ground Control Points (GCPs) for a custom coordinate CSV. In one recent case, a CSV with only 3 GCPs failed to upload.
Q: What is the minimum number of GCPs required for a successful upload?
A: Based on internal testing, a minimum of 4 GCPs is needed for the GCP tool to process a custom coordinate CSV file correctly.
Q: Why can’t I use only 3 GCPs?
A: While you may only need a few GCPs for your workflow, the tool currently requires at least 4 GCPs to support the spatial transformations and alignment processes. This is a system limitation that ensures accuracy in georeferencing.
Q: What if I only have 3 GCPs available?
A: If you only have 3 GCPs, we recommend capturing and adding at least one more GCP to meet the minimum requirement for uploading. If that’s not possible, please reach out to DroneDeploy Support to explore possible workarounds or alternatives.