== Introduction ==
In this application note, we will demonstrate how [[EM.Terrano]] can be used to analyze a very large urban canyon propagation scene using its ultrafast k-d tree based ray tracer. Specifically, we will construct a scene representing a portion of lower Manhattan, NY, with real-sized models of its buildings and terrain profile. The total size of the area is 1.3km × 1.2km, and it will be covered with a very large rectangular grid of receivers equally spaced with a uniform spacing of 5m. You can learn more about the basic procedure for setting up an propagation scene and running a SBR simulation in "[[EM.Terrano Tutorial Lesson 23: Analyzing An Outdoor A Multipath Outdoor Propagation Scene]]".
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