Dear Chad and Robert,
We apologize for the very late reply. We are aware that many posts on the Forum remain unanswered and we are working on the best way to proceed to deal with the Forum posts and the emails.
We encourage users to post to the forum as other people having the same problem might help you and other users can benefit from the answer. However, if a rapid and precise answer is required on a technical question, such as this one, we suggest you contact our support team directly (firstname.lastname@example.org).
Regarding your question, you will indeed find the positions and orientations of your calibrated cameras in the following .txt files:
- For X, Y, Z (output coordinate system) and orientations in degrees (output coordinate system): …\project_name\1_initial\params\project_name_external_camera_parameters
- For Long, Lat, Alt (WGS84) coordinates and orientations in degrees (output coordinate system): …\project_name\1_initial\params\project_name_external_camera_parameters_wgs84
Then the orientation parameters should have the same values in both files.
More information about the parameter files: https://support.pix4d.com/hc/en-us/articles/202977149
The output coordinate system depends on your input (images geolocation and GCPs). If you do not have any georeference (images coordinates or GCPs), then the output coordinate system will be arbitrary.
Regarding the possibility of selecting the best photo that contains a viewpoint for the 3D model, currently we do not do it in Pix4Dmapper.
This is something we do for the orthomosaic (using the Mosaic Editor: https://support.pix4d.com/hc/en-us/articles/202560079) but not for the 3D model.
Again sorry for any inconvenience due to our late reply.