> What is the easiest way to incorporate a scanned copy
> of map and establish a network system as well as to
> conduct a traffic assignment?
You will have to manually "digitize" the roadway network from
your scanned map. Fortunately, transcad offers you some
ready tools for such a task.
Scanned the hardcopy map and generate a plain, uncompressed,
TIFF file out of it. Then you can simply open the TIFF image
in transcad. You can then use the "Imagery" toolbox to "register"
the image -- basically telling transcad where, geographically,
the image belongs on the surface of the Earth.
Once the image is registered, you then create a new, empty line
layer, simply using the File-New command. This new empty layer
gets added to the map of your image -- think of it as putting
a piece of tracing paper over you paper map.
You can then use the Map-Editing toolbox to trace the roadway
geographic into the new layer.
Of course, each of these steps has its own set of details and
nuances. The user\'s guide gives extensive instruction for
all these steps. See Chapter 29 for instructions on working with
and registering images. See Chapter 24 for instructions on
using the Map Editing tools.
Note that if you have a digitizing tablet, you can use that in
transcad to digitize directly off the paper map, skipping the
scanning step. This is discussed in the User\'s Guide in Chapter
27.
