Building zone of drainage

This mode allows to define zones of drainage on a map using an information from a  matrix  of heights.

Matrix name for building zone of drainage gets out from the list of Matrixes of heights.

To build a zone of drainage select a map object for which the drainage will be carried out.

In a dialog window Building zone of drainage the user should enter a height of water lowering (numerical value in meters).  

The outcomes of building are kept in a matrix map.

The name of Output file (matrix of qualities) is set automatically and consists from a heights  matrix file name with addition "_mtr" and expansions *.mtg.  The file name, a degree of  visibility and  width of flooding zone may be changed by the user.