Lige et par linier fra help, ver. 2002:
Protecting a drawing from being edited
--------------------------------------------------------------------------------
Issue
You want to "lock" a drawing so that other users can view, but not modify, the information in the drawing.
Solution
There are several ways to prevent drawing data from being modified. You should decide which approach to use based on your situation.
The following descriptions summarize several of these options:
Password Protection
You can use an add-on utility to password-protect a drawing. Search the Internet for such utilities.
Drawing Conversion
You can convert a drawing into another file format so it is more difficult to modify. By using an alternative to the drawing file format (DWG) you can maintain some control over the drawing data. You can convert a drawing to one of the following file formats. Note that all of these formats are two-dimensional in nature; thus, some information is lost in the conversion.
EXPORT command
Of the many file formats available when you use the EXPORT command, the Drawing Web Format (DWF) is the most visually accurate and provides more protection than the other formats. To view the DWF file, you use a DWF viewer, such as WHIP!, which is available free from
www.autodesk.com/whip, or others that you can find by searching the Internet.
Other formats available with the EXPORT command are EPS, BMP, and WMF. These formats are viewable by many graphics software packages. There are, however, conversion programs that can convert these formats back into AutoCAD DXF format.
Note: The Export options in AutoCAD LT are more limited than AutoCAD. When using AutoCAD LT there is only the WMF format to choose from.
Plot files
Plot file formats such as HP-GL, HP-GL/2, PostScript all provide a good degree of accuracy, and viewing programs are available (search AutoCAD-related Web sites). The PostScript plot file can be converted into the Adobe PDF file format, which is readable and plottable by the Adobe Acrobat program. Also AutoCAD includes the Raster File Export plotter driver, which uses the PLOT command to generate files in several raster file formats (BMP, TGA, PCX, and TIFF).
As with the file formats provided by the EXPORT command, there are conversion programs that can convert these plot file formats back to the AutoCAD DXF format.
COPYCLIP
You can use the COPYCLIP command to take a snapshot of the drawing. Using the PASTE SPECIAL command, you can paste the snapshot in bitmap (BMP) or metafile (WMF) format into another document. The visual accuracy is not as good as some of the other options. The advantage of using this option is that it may be faster than other methods for providing multiple clips of various views of a drawing at various zoom magnifications with accompanying annotation. The COPYCLIP command is limited to the Microsoft Windows operating systems, therefore, the data may not be portable to other operating systems, such as UNIX.
Slide file format
You can use the MSLIDE command to create a snapshot of the current view of the drawing in AutoCAD slide file format. The resulting file can be viewed but not edited in AutoCAD 2000 (using the VSLIDE (command) and other CAD viewing programs.
Hardcopy
With scanner and raster-to-vector conversion software, printed media can be converted back into electronic DXF or DWG data. However, you can apply notations or a screened pattern as an overlay to printed media, making it more difficult to convert a hardcopy drawing into electronic format and more time-consuming to edit into a usable drawing.
Drawing Alteration
You can modify a drawing so that other users have difficulty modifying it. For example, locking layers or blocking the drawing data in a nested fashion at various unequal scale factors may impede inexperienced AutoCAD users. However, experienced users would be able to identify and readjust the parameters of such a drawing.
Read-Only Access
By changing the file attribute of a drawing or setting modification restrictions to certain groups on a network, you can prevent users from modifying drawing data. All viewing operations are available, but the user cannot save changes back to the drawing file. However, read-only access is not a foolproof protection of drawing data. If the drawing file attribute is set to read-only, the user can still save the drawing under a different file name. In a network environment, if the user has access to a directory for writing (such as a disk drive), the user can save the drawing to that location and then modify it.
View-Only Software
You can provide view-only and redline software to work with the drawing. Several software programs are available that allow a user to view and redline AutoCAD 2000 drawings. These programs have features that allow the user to zoom in and out of the drawing, and view non-graphical information such as layer and block information. One such program is Autodesk View, which is described in detail at
http://www.autodesk.com/view. In a controlled environment, this software may provide an effective solution to protecting drawings.
Note: If you want to permanently convert a drawing so it can be viewed but not modified, see Related Topics.
Related Topics:
Cannot explode non-uniformly scaled blocks
Inserting a block that cannot be exploded
Sharing drawings with users of non-AutoCAD based products
TS11098
Ny bruger
Nybegynder
Opret
Preview
