Coordinates scale

[Areslow]

Hi guys , I'm newbi with photo scan so need help .
My problem is that i have 3 aerial photos and want to create point cloud from these photos . In the camera calibration tools i define focal length and pixel size , also i set x y z coordinate  center in gps/ins tab and photoscan create my point cloud .
The problem is the coordinates it gives me is not what they are in real world they are local and the scale not what i need and want calculate some volume , so i can't use these coordinate .
What elese do i need to aquire real world coordinate from photoscan ?

[JMR]

The GPS/INS tab is not intended to set camera coordinates but to describe camera offset with respecto to the gps antenna (where coordinates are actually measured). Its likely your coordinates are already camera coordinaes so set offsets as null
In case you have camera coordinates, you should write a text file with them
photo1_name; X; Y; Z
photo2_name; X; Y; Z
photo3_name; X; Y; Z
Then import this file from the reference panel after having loaded you photos and set the reference coordinate system (in reference panel setting)
After all you can align but don't expect any good coordinates in your model out of just three cameras

[Areslow]

with some try finaly added coordinates , thanks