Routing
Routing is the act of finding a path from point A to point B on a road network. The deCarta routing engine calculates routes by a least cost method, which can be defined as:
The Rich Map Engine Route Finding Library, which is also the core functionality of the Drill Down Server Route Plug-in, performs by default what is called least cost routing. That is, each distance of road traveled is given a specific cost to it. Additionally, the number of turns and types of turns along a route have a specific cost associated to them. For example, making U-turn costs more than making a right turn. Internally in our calculations of a "route cost" we use milliseconds as a standard unit.
The least cost route might not always be the shortest route in terms of distance.
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