I am begining to see how the solution can work, many thanks for all the
tips. If I can get the map "nailed" to my scale, I feel that I can tweak
it into a known precise position and then register it by some lank marks in
the view that can become the connection points.



In this rather unique case, the map is driving the objects to be captured,
not the other way around (as in the example given). So I want to lay out
the map image on a blank page to be as large as practical, register its
size/position with lat-long system (and set the Visio scale), then overlay
my map objects and finally (once the model is built) extract their position
in the Visio scale system and then translate them back to Lat-long or
express the points as as centimeter offsets from some known "anchor" points.



In this specific case the lat-long is expressed to 1/10,000,000 of a degree,
which in much of North America is about a 1cm each way, while the "local"
measured ground truth (the objects on the Visio map) is always expressed to
be in 1cm units of LSB. So I will try and register this image to reflect a
scaled X and Y value that reflects the local ellipsoid at that location
(nasty math, but better then doing a multi dimensional "mesh" of many points
like a cartographer would do). Throw in the fact that north is not always
where you think its (so we have some rotation) Off I go....

DC Kelley