Nodes of different colours represent the following:
Solid arrows point from a submodule to the (sub)module which it is
descended from. Dashed arrows point from a module or program unit to
modules which it uses.
Where possible, edges connecting nodes are
given different colours to make them easier to distinguish in
large graphs.
~ ~ ~ PURPOSE ~ ~ ~
reads in the routing information from the watershed configuration
input file (.fig) and calculates the number of subbasins, reaches,
and reservoirs
read number of spatial objects from obj_connect.dat