Using background images

You can insert true to scale digital maps as a background image for a detailed Vissim network model as graphics files.

You can scan similar maps and save them as a graphic file. You load the graphic file of the digital map as the background image in Vissim and display it in a Network Editor. You can move and scale the background image in the Network Editor. You then position the network objects on the background image.

• The selection of file formats is limited in the 64-bit version of Vissim. Vector graphics in the file formats *.dwg and *.dxf may not be displayed correctly. You can use graphics programs to convert vector graphics to raster graphics such as *.bmp or *.jpg.
• The memory requirement of background images depends on:
• File format and compression of the graphic file, especially with the file format *.jpg.
• Screen resolution and color depth
• In particular for 3D mode of the memory and graphic card memory
• Thus the maximum possible file size also depends on your hardware.
• A warning is issued if the graphic file is larger than the available main memory. This provides the option of loading the file nevertheless.
• If a graphic file is too large, it cannot be displayed correctly. For example, a black or white area is displayed. Reduce the graphic file with a graphics editing program, for example, by zooming out of the screen section or by reducing the resolution.
• When a background file is read into Vissim, it is displayed in the Network Editor in tiles. You can change the screen section during the drawing of the tiles in 3D mode. As long as the background image is not fully loaded, the entire network is shown and then after that the section, which was selected before the background image was imported.