nadirpinhole not properly set in camera_solve with camera positions.

[ScottMcMichael]

When --camera-positions is passed in to camera_solve it should automatically use the session "nadirpinhole" but this is not working properly.

[oleg-alexandrov]

Good point. This would assume we are on Earth though, which I guess it is reasonable since we don't play with frame cameras on other planets.

There is also the issue if bundle_adjust assumes a datum when it does the first adjustment, while the cameras are still in an arbitrary coordinate system. Maybe camera_solve should invoke bundle_adjust with the --no-datum flag.

[ScottMcMichael]

I was not able to reproduce this error so it may take extra investigation.