A view definition consists of setting the active graphic, database, polygonal and surface cover level as well as identifying which graphic levels are turned on. Commands are issued through the Arc Command Line processor. Full digitizing capabilities as well as file transfer and conversion routines are available. The PC version of this software can only operate on vector data. The Windows NT and UNIX versions also have a GRID module to handle raster data.
Topology exists in the vector data.
Commands are typed at the Arc Processor command line prompt so no use is made of the Windows environment, pull-down menus, icon and the mouse. Therefore, there is data integrity and an unlimited number of coverages can be created. Inc. The main strengths of this software are its plotting capabilities and its overlay functions. Each produces a different result. This way you do not need to scoll back and forth through the text and you will not suffer from data loss due to incomplete transmissions.