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I am coding a C# project using MapPoint Web Service 3 and would like to know if anyone has some ideas on how to solve my problems. My issue is that I require some way to simulate a vehicle traveling along a MapPoint route I then need to detect when a vehicle is within a specified distance of a lighted intersection and run a seperate class on this occurance.

Currently all I can think of to simulate a vehicle is to continuously feel lat/lon points but this seems like a very poor method. Does anyone have a more elegant sugestion? All ideas are welcome and your help is greatly appreciated

Hello,

There probably isn't a real good way to do this for several reasons:

1. When you get a result set containing directions it will include the lat/longs for the starting and ending points of a particular street segment. The problem here is that it doesn't not include lat/longs or pixel coords along that segment. So, if you have a long street segment there's really no way to know the pixels or lat/longs to pass in. The problem would show itself when that street is long and has a curve. Because you only have the start and end points you would have to figure the lat/longs (if you were getting a new image from MapPoint constantly as you moved along the segment) or pixels (if you were drawing on the client side) your self and there would be know way for you to know that the street curved. This would cause your simulated vehicle to cut across this curve and depending on the street could look pretty ugly.

Note: Drawing the vehicle each time it moves using the web service is not a good idea because first, it a billable transaction for every getmap call and it also would be slow if you want make the vehicle movement look smooth. You would almost be forced to draw the movement on the client side.

2. How are you determining/finding the 'lighted intersection'?

The only part that is easy to determining the distance between the simulated vehicle and the intersection (if you can find a good way to determine these coords to start with). The SDK includes the code for calculating Great Circle Distance.


Steven Pushee

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You tell that the result set containing directions include the lat/longs for the starting and ending points of a particular street segment. How can I get these starting and ending points ?