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Computer Aided Design software is widely used in construction and other manufacturing industries. When designing and working on a new project or new product, an engineer will require frequent modifications or upgrades to the original design. Therefore, before the end product is produced, the original design drawing file will be modified with multiple versions. If all these different versions of design documents and drawings are not managed properly, a series of problemsr or erors will sure occur at the production stage.

Drawing comparison is part of the process in drawings management. Engineering drawings are usually complex. Different versions of drawing files may have only slight changes. In the traditional way of comparison, engineers will have to manually locate the changes between two drawings. This will result in potential human errors and lower the engineering management efficiency.

There are three options in VHCompare drawings comparison: Coordinate System comparison, Select Base Point comparison, and Select Area comparison. User may choose any of these 3 options to perform comparison according to the actual situations.

   VHCompare AutoCAD Add-on Edition

 Easy to install and use
 Support AutoCAD 2000 to AutoCAD 2009
 Comparison results can be easily referenced while
      working on the original drawings
VHCompare Standalone Edition

 Does not require AutoCAD
 Comparison is done in a standalone application
 Support AutoCAD R14 to AutoCAD 2000 versions of
     DWG and DXF files
VHCompare SDK
Provide application programming interface
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