Georeferenced DWF Files
I have come to rely on my power users. Just the other day one of my power users (Michael Elander) came to me asking about georeferenced DWF’s. To be frankly honest my knowledge of georeferenced DWF’s really extended no further than a flier I picked up at AU or something on Design Review 2008. The concept I understood, but how to create one, I just hadn’t invested the time to figure it out.
The whole reason Mike wanted to pursue the topic was because he was asked to share some drawings with a third-party who was not our client. They needed to be able to reference our drawing, but we didn’t want them to be able to manipulate our drawing. As many have discovered over the years, locking down a DWG file is easier said than done. Sure there are some third-party apps out there, but what about the tools we already had installed?
That’s where the idea of the georeferenced DWF came up. Since AutoCAD 2008 we can Xref a DWF, snap to the linework contained within it, and provided we enable them, turn layers on/off. Translation: it’s essentially a DWG which the third-party can’t modify – perfect!
Setting up a Named Page Setup
Since we’ll be using the PUBLISH, not PLOT, command to create our DWF, we need to start by creating a named page setup. The main purpose of this is to assign things like which pen table & paper size to use.
- From model space type “PAGESETUP” at the command line.
- Click the [New] button from the Page Setup Manager dialog.
- Give your Page Setup a name, and press [Ok]. For this example I’ll name mine 24×36.
- After pressing [Ok] you will be presented with a dialog that if not for it’s slightly different title would be called the PLOT command. In my case I am creating a DWF from model space. For that reason I will need to configure things like my scale (which for plots from a layout tab is 1:1), and possibly a window.
Creating the DWF
Now that we have a named page setup we can proceed to actually creating the DWF itself. While you can certainly create a DWF from the PLOT command, you cannot create a georeferenced DWF from the PLOT command. Instead we’ll have to use the PUBLISH command.
- Go to File > Publish or type PUBLISH at the command line.
- With the Publish dialog open, I am going to assign the named page setup (24×36 in my case) to my model space view.
- Next I’ll want to tell AutoCAD to Publish to a DWF file, and then click on the [Publish Options] button.
- From the resulting Publish Options dialog, I can specify whether or not to include layer information [DWF Data Options]. Important for the purposes of this post is the Map Information option under the Map Options heading. We’ll need to change that to Include.
- I am finally ready to create my DWF file, and can click the [Publish] button.
AutoCAD will proceed by creating your DWF file. The time it takes to do this will vary based on variables such as your machine, DWG file size, etc.
Referencing the DWF
Now that I have created a georeferenced DWF, inserting it into a drawing is a snap. Simply go to the Reference Manager (XREF command), specify an insertion point of 0,0, and your DWF will magically insert in the proper location.