Download USER MANUAL

Project processing
2011
Action Log
To undo the last editing operation, press the
button (Undo last action) on the toolbar
button (Redo last undone
of the window. To redo the last undone operation press the
action). To cancel the group of actions, double-click the left mouse button on the line with
the action, to which you want to roll back the changes. Fields with an undone action are
marked in italics (see the screenshot). To redo the undone changes, double-click the left
mouse button on the field which changes you want to revert. Pushing the Clear undo log
button leads to the removal list of operations and as result the undo and redo operations
become impossible.
There is separate list of actions to cancel for each layer.
Note: While working with a large number of 3D vectors using the undo mode, the
editing operations may be performed slowly. To disable the undo mode use the
Service | Settings menu command, the Undo section (see also chapter Undo settings).
5. Creation of digital terrain model (DTM)
5.1. Types of DEM representation
Main type of digital elevation model is irregular network of triangles – TIN (Triangulated
Irregular Network). TIN may be transformed into regular grid resulting in creation of digital
elevation model (DEM) or represented as a set of contour lines (terrain contours,
submarine contours or other isolines).
See also the chapter:
 TIN
69
RACURS Co., Ul. Yaroslavskaya, 13-A, office 15, 129366, Moscow, Russia