streamorder

streamorder

Stream order index of all cells on a local drain direction network

Result = streamorder(ldd)

ldd

spatial ldd

Result

spatial ordinal

Operation

The classification of stream networks was originally developed by Horton, and modified by Strahler. Following the scheme of Strahler, streamorder designates an order 1 to the smallest channels, which are the cells with no upstream cells connected to that cell. Where two channels of order 1 join, a channel of order 2 results downstream. In general, where two channels of order i join, a channel of order i+1 results.

Group

This operation belongs to the group of Neighbourhood operators; local drain directions

See Also

accuflux

Examples

1. • pcrcalc

   binding

   Result = Result.map;

   Ldd = Ldd.map;

   initial

   report Result = streamorder(Ldd);

   
   

   • python

   Ldd = readmap(“Ldd.map”)

   Result = streamorder(Ldd)

   Result.map	Ldd.map