An attempt to fix MapPoint Highway rerouting

**VBWizz** · 12-16-2006, 08:19 PM

Hey Guys

I have been trying for a while to get mappoint to route from a location on a highway and as every one knows it just draws a line to the nearest road and then the route is way off.

Here is what I came up with.

In the RouteAfterCalculate event I check the Directions Instructions for all the directions if the First One Contains Local Road(s) then I am assuming I am on a freeway ( I know Assumtion is the key to all F**k ups) But any way.
after that I iterate all the directions untill I find one that says take ramp
which would mean that puts me back on the freeway.. I use the locaiton object of that direction as my starting point. and calculate the route but that does not seem to work.

any body have any ideas..

**VBWizz** · 12-26-2006, 04:33 PM

Originally Posted by VBWizz

Hey Guys

I have been trying for a while to get mappoint to route from a location on a highway and as every one knows it just draws a line to the nearest road and then the route is way off.

Here is what I came up with.

In the RouteAfterCalculate event I check the Directions Instructions for all the directions if the First One Contains Local Road(s) then I am assuming I am on a freeway ( I know Assumtion is the key to all F**k ups) But any way.
after that I iterate all the directions untill I find one that says take ramp
which would mean that puts me back on the freeway.. I use the locaiton object of that direction as my starting point. and calculate the route but that does not seem to work.

any body have any ideas..

Ok So I got the above to work, Any body have an Idea how to draw a line from the current location to the that of the starting point. I and I mean not a strieght line, but a line that snaps to the road..

**RickS** · 12-27-2006, 10:43 AM

If someone knows how to do this, I'd love to see it. Apparently this is what MS has done with S&T...if you look closely when you are on the highway and create a route it creates a triangle between your location, the closest local road, and the first on ramp on your route.

**VBWizz** · 12-27-2006, 05:14 PM

You Know I found a snap to road Function On one of the mappoint web sites however it is in Delphi, and I dont understand it.. If i can find a C# or VB version, that may be a good starting point..