Autodesk laungh 123D catch for mobile devices giving the possibility to create 3D models on the fly. Results depends on the camera, so, what kind of models can we expect with Nexus 7 2013.
This series of images will show how to produce an interactive immersive file from photographs.
Everything has been done with Photoscan and exported to Unity through 3DsMax.
It is possible on the IGN web site to measure distances between objects. It will be necessary to check distances from the 3D model and those taken on site.