If the GCP geolocation and the GCP coordinate system are not correct, it can lead to processing failure.

In order to ensure that the correct GCP geolocation and the GCP coordinate system are used verify that:

1. The GCP coordinate system is correct.

2. The initial 3D coordinates for each GCP are correct.

**1. Verify that the GCP coordinate system is correct**:

1. Click **Project > GCP/MTP Manager...**2. In the

*GCP/MTP Manager*, under the section

*GCP Coordinate System*, verify that the correct

*Datum*and

*Coordinate System*are selected.

3. If the wrong coordinate system is selected, click **Edit...**4. On the

*Select GCP Coordinate System*pop-up, change the coordinate system. For more information on how to change the coordinate system: How to select / change the Image / GCP / Output Coordinate System.

5. On the

*GCP/MTP*

*Manager,*click

**OK**.

**2. Verify that the initial 3D coordinates for each GCP are correct**

For step by step instructions about how to verify that the initial 3D coordinates for each GCP are correct: How to verify that the GCP Geolocation is Correct.

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