Maybe it is too late but at work I use 3 pdf viewer :
- Adobe for 3D PDF
- PDF Architect for viewing
- PDF Xchange for measuring areas and lenght upon 2D scaled plan (note that’s some PDF created with strench option can break the scale while creating, therefore you should check the scale upon given distances in the 2 directions before measuring any unknown distances or areas).
Christophe CHEVALIER, structural analysis engineer.