Understanding Photogrammetry
If your project contains two or more stations, each with referenced photo images of the same object, you can make photogrammetry measurements of the object to assign to it a point with a three-dimensional (3D) coordinate. You do this by selecting the object in a photo from each of the stations and applying a measurement. Trimble Business Center then calculates the point's real-world coordinate based on the intersection of the resultant line-of-sight rays from each to the two station cameras.
It is important that when you make a photogrammetry measurement, you use observations that provide low strength-of-figure. For example, if your measurement includes two observations, the two-line intersection should typically be 30 degrees or greater.
Note: Using the Project Settings dialog, you can specify intersection and strength-of-figure tolerances that, if exceeded, cause an out-of-tolerance flag to display.
Using Trimble Business Center, you can make photogrammetry measurements to create points, modify photogrammetry measurements, and view photogrammetry properties and observations in the Project Explorer, Properties pane, and the various graphic views.
