To verify that at least 75% of the images have good image geolocation:
1. Click Project > Image Properties Editor...
2. In the Image Properties Editor, use the image table to verify that for at least 75% of the images the Latitude, Longitude, Altitude (or X, Y, Z) coordinates do not have the value (0,0,0) and are correct.
3. If the coordinates are not correct, correct them following these instructions: How to select/change the images geolocation and orientation. If you import the coordinates from a file, verify that the coordinates in the file are correct and that the correct coordinate format (Latitude, Longitude, Altitude / Longitude, Latitude, Altitude / etc.) is selected when importing the file.
4. On the Image Properties Editor, click OK.