Dissection of the object by a line    

An area or linear object can be dissected by a line. For this purpose it is necessary at first to select the dissecting object and then to construct a line. After termination of line construction the selected object will be dissected.

In case at the moment of a mode activation the group of objects has been selected on an edited map, it is offered to the operator to dissect all this group or to choose concrete object on a map.