Article: Sodex Mobile - Upload Project GCPs

Summary

Uploading a layer as project GCPs lets you turn measured points into a reusable GCP set for the project. Use this workflow when you want future processing in the same project to use project-level GCPs instead of attaching GCPs to a single scan.

Introduction

This workflow starts in the SDX-Pole screen. Because layers are already tied to a project, you upload the points from the correct layer directly from that layer’s option menu. During upload, you define the GCP set name shown in the project settings in SDX-Cloud and confirm the target diameter.

This is a project-level workflow. It updates the project’s GCP set for future work rather than adding GCPs to one specific scan.

Prerequisites

• The points you want to upload already exist in a layer in the correct project.
• The layer contains at least 3 point measurements.
• You can open the SDX-Pole screen and access the layer list for the project.
• If you still need to capture the points, complete the SDX-Pole measurement workflow first.
• You have an internet connection so the upload can complete.

Step-by-step instructions

1. Open the correct layer in SDX-Pole

1. Open Sodex Mobile and go to the SDX-Pole screen.
2. Open the project that contains the layer you want to use.
3. Find the layer that contains the point measurements you want to upload as project GCPs.

Checkpoint: Use the layer that belongs to the correct project. You do not need to select the project again during upload because the layer is already project-based.

2. Start the project GCP upload

1. Long-press the layer.
2. In the option menu, select Upload as GCPs.

Checkpoint: The upload dialog opens for the selected layer.

3. Enter the GCP set details

1. Enter a name for the GCP set.
2. Use a name that will help you identify the set later in the project settings in SDX-Cloud.
3. Enter the GCP diameter in millimeters.
4. If needed, keep the default value of 200 mm, which matches the standard 20 cm Sodex ground control point target.

Checkpoint: The upload form contains the GCP set name and diameter before you continue.

4. Upload the layer points as project GCPs

1. Review the entered values.
2. Start the upload.

If the upload succeeds, Sodex Mobile shows a small success notification.

Common failure points and fixes

Upload fails because the layer has too few points

• Symptom: You see Upload Failed - At least 3 points are required.
• Cause: The selected layer does not contain enough point measurements.
• Fix: Add more points to the layer until it contains at least 3 points, then start the upload again.

The wrong project is updated

• Symptom: The uploaded GCP set does not appear where you expected it.
• Cause: The selected layer belongs to a different project.
• Fix: Return to the correct project in SDX-Pole and upload the correct layer.

The uploaded points should no longer be reused

• Symptom: The project GCPs do not match the physical targets in the field.
• Cause: The targets were moved after the points were measured.
• Fix: Measure the targets again in a new or updated layer, then upload the updated points as project GCPs.

Verification

1. Confirm that Sodex Mobile shows the success notification after the upload.
2. Open the related project settings in SDX-Cloud.
3. Verify that the GCP set appears with the name you entered during upload.

Related articles

• Introduction to Ground Control Points
• SDX-Cloud: How to create a ground control point set
• Sodex Mobile: How to work with Ground Control Points
• Sodex Mobile: Capturing measurements with the SDX-Pole Antenna
• Sodex Mobile: Connect to the SDX-Pole Antenna