Per the reference article that David Parker refers to, you need to establish
reference points on your imported picture. Since it's just an intersection,
probably there is no "drawing scale" as a guide.

What you can do...
1.) Select your imported drawing and 1st protect its aspect ratio.
2.) Then, zoom in, say, to the intersection to get enhanced resolution.
3.) Add to two connection points, one on each side of the intersection
4.) Add a measurement shape to these points. This allows you to monitor
the street width as you resize the drawing.
5.) Change the drawing size until the street width matches your scaled map
dimensions. This ought to provide sufficent accuracy.


HTH
Wapperdude
"David J Parker [MVP Visio]" wrote:

And I normally defer to Chris's excellent article at
http://www.visguy.com/2007/07/13/map...imension-line/


"AlEdlund" wrote in message
news
David Parker does a lot with maps (http://bvisual.spaces.live.com/), so
you might check over on his site.
al


"DC Kelley" wrote in message
...
I am working on an application that needs to overlay a photo of an street
intersection with a scaled map of that same intersection. The typical
map
scale would be 1cm on the page to represent 1m (1:100) on the ground. I
have no idea how to control the relative size of the imported image and
how
to then scale it to match my page scale needs. Ultimately I will need to
be
able to translate between the image coordinate system and my page system,
but I really don't know how to start. Are there any relevant application
examples the group can point me to learn more about scaling images this
way.
Regards, DC Kelley