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Reverse geocoding, another method

This is a discussion on Reverse geocoding, another method within the MP2K Magazine Articles forums, part of the Map Forums category; Gilles Kohl submitted this update to his previous article on reverse geocoding Read the full article: http://www.mp2kmag.com/articles.asp?ArticleID=47...

  1. #1
    Anonymous is offline Senior Member Black Belt
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    Reverse geocoding, another method

    Gilles Kohl submitted this update to his previous article on reverse geocoding

    Read the full article: http://www.mp2kmag.com/articles.asp?ArticleID=47

  2. #2
    Anonymous is offline Senior Member Black Belt
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    Finding coordinates of route segments

    For some time I've tried to find a way to find the coordinates of the staring point of route segments. I want to be able to sent these coordinates to my basic garmin GPS. I've written code that sends the points of a polyline to my GPS. But I always have to trace a route by hand because MapPoint only returns the middle of a route segment and not the start. Your article gave me hope by using the extrapolation technique I thought I would be able to find the starting points of all the route segments. This works for strait route segments, but for example on a roundabout this doesn't work anymore. There the middle of the route isn't in the middle of the start and end of the segment. While exploring this technique I came up with a completely different solution. I found out that when you select a route segment, a label with the instruction appears on the map at the start of the segment. I found out that by using the GetPixel or, better the GetBitmapBits, api calls I could analyze the map bitmap and find the location of this label and therefore the starting point of a route segment. There are many disadvantages to this technique. It is slow and the different maps are 'flashing' over the screen. Also I have to improve the technique further because it is not working 100%. But if there are others who are interested in this technique I'd be happy to share it, and maybe together we can further improve it.

    Nico Bontenbal
    The Netherlands

  3. #3
    Eric Frost's Avatar
    Eric Frost is offline Administrator Black Belt
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    If you would like to submit it as an article, that would be the most effective way to get feedback on the technique.

    Eric
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