  As unmanned aerial systems (UASs) increasingly integrate into the US national
airspace system, there is an increasing need to characterize how commercial and
recreational UASs may encounter each other. To inform the development and
evaluation of safety critical technologies, we demonstrate a methodology to
analytically calculate all potential relative geometries between different UAS
operations performing inspection missions. This method is based on a previously
demonstrated technique that leverages open source geospatial information to
generate representative unmanned aircraft trajectories. Using open source data
and parallel processing techniques, we performed trillions of calculations to
estimate the relative horizontal distance between geospatial points across
sixteen locations.
