How to verify that the image geolocation ,the output coordinate system and the GCP coordinate system are correct - PIX4Dcloud

There are three different coordinate systems that can be defined in PIX4Dcloud:

• Image coordinate system: It is the coordinate system of the images. PIX4Dcloud expect the images to be in WGS84 (lat,long, ellipsoidal height). After importing the images, they are projected to a background map. If the coordinate system is correct, they will be in the right position on the map:
• Output coordinate system: It is the coordinate system in which the outputs (ortho, DSM, point cloud and 3Dmesh)  will be produced. It is picked by the user in the Coordinate Reference system step of the wizard although PIX4Dcloud offers a default one which is computed based on the image geolocation. Unless there are particular requirements in the project and an specific coordinate is required , the default one is always valid.
  
  
• GCP / Check points coordinate system (only for PIX4Dcloud Advanced users): It is the coordinate system of the Ground Control Points (GCPs) and Check Points (CPs) and it has to be the same as the output coordinate system. In order to check whether the coordinate system is correct,  both images and GCPs / CPs must be in the right position on the background map that is shown in the GCPs automation step of the wizard:
  
  

More information about how to use the AutoGCP feature in this article.