According Urbica, accuracy is the difference between a measurable distance "field" and his correspondence in the 3D file. Example: an accuracy of 10 mm means that if a pipe-rack actually measure 115, 48 meters, the pipe-rack modeled 3D Urbica measured between 115.49 and 115.47 meters. Example 2: The situation "geographic" or "topographic" (coordinates) of a valve in the 3D file is at its actual location with a tolerance of 10 mm from the actual situation on site.

The overall accuracy of our statements is generally between 5 and 20 mm.