Exercise 1: Add the layers to compare

To begin an overlay analysis, connect to the layers you are comparing and add them to a map.

To add the layers to compare

1. If you have not already done so, copy the sample files for the tutorials to a directory on your hard drive.
2. Start AutoCAD Map 3D toolset and create a map using the map2d.dwt template.
3. Assign a coordinate system to the new map.
   • Click Map Setup tabCoordinate System panelAssign.
     

     You can also right-click the current drawing to set the coordinate system for the map in Map Explorer.

   • Specify the CA-I coordinate system.
4. Connect to the first data store.
   • Click Home tabData panelConnect.
   • In the Data Connect window, under Data Connections By Provider, select Add SDF Connection.
   • Click next to the Source File field and navigate to the folder where you copied the sample files.
   • In the Open dialog box, select FLOODZONE.SDF and click Open.
   • In the Data Connect window, click Connect.
   • In the Data Connect window, click Add To Map.
5. Connect to the second data store.
   • With the Data Connect window still open, under Data Connections By Provider, select Add SDF Connection again.
   • Click next to the Source File field and navigate to the folder where you copied the sample files.
   • In the Open dialog box, select E_ZONE.SDF and click Open.
   • In the Data Connect window, click Connect.
   • In the Data Connect window, click Add To Map.
6. Click Save As. In your tutorials folder, name the file AnalyzeMapOverlay.dwg and click OK.

To continue this tutorial, go to Exercise 2: Use an overlay to compare two layers.