GIS layers

GIS layers

With M2Assistant, you may also view geographic files produced using MapInfo (using the MIF data exchange format) or ArcView (using a shape SHP file). In this way, additional detail can be plotted as a background to the EMME/2 network.

To add and view a GIS file, right-click the layers in the layer list on the left and choose the Add Layer.. menu option. Then, choose the type of file (*.mif or *.shp) and open the file. The GIS file will be added to the layer list.

You can drag the new layer to the top of the list if you wish all other layers to be plotted on top of it.

This file may not use the same coordinate system used by your EMME/2 database. In this event, you must translate the coordinates from the GIS file such that they match up with the EMME/2 database. To translate from one coordinate system to another, you must define three variables (A, Bx, and By) as per the following formulae:

xNetwork = (A * xFile) + Bx
yNetwork = (A * yFile) + By

Note that this is a linear translation. The GIS file cannot be rotated to fit the EMME/2 network. Once you are satisfied with the position of the GIS layer, check the Apply translation box and refresh the plot. You may also lock it in place by checking the Lock position box.

M2Assistant can also calculate these three variables for you by setting equivalent coordinates.