Those who use Civil 3D without Raster Design can get the Raster Design Object enabler to enable you to insert MrSID and ECW image file formats using the MAPIINSERT command. This command inserts an image as a Raster Object. There is another way to display images in Civil 3D. In Civil 3D 2011 you do not need an object enabler to connect to a MrSID file. This file format is supported by FDO.The main advantage to connecting to an image using FDO is better memory management of images. Use Feature Data Objects (FDO) to “connect” to an image rather than “insert” the image. FDO is a part of Map 3D which is a part of Civil 3D. Type MAPWSPACE on the command line to turn ON the Task Pane. On the Display Manager Tab click on the Data button and choose Connect to Data. Now you have the Data Connect palette open. On the left side highlight Add Raster Image or Surface Connection. On the right side choose one of the buttons above the Connect button (grayed out). The one on the left allows you to connect to a single image file. The one on the right allows you to connect to an entire folder of images. The rest of the process is fairly intuitive so I’ll end it here.
Using FDO to display MrSID and ECW image file formats in Civil 3D 2011.