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calculate straight line distance
This is a discussion on calculate straight line distance within the MapPoint 2006/2009 Discussion forums, part of the Map Forums category; Hi to all, i'd like to know a method to calculate straight line distance between two points. To add a ...
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12-13-2006
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| calculate straight line distance i'd like to know a method to calculate straight line distance between two points. To add a line i do map.Shapes.addLine(location1,location2) and distance? Thank you for any suggestion, Francesco         |
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12-13-2006
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| Re: calculate straight line distance
Think this works in VB6 when you haven't calculated a route oMap.Shapes.AddLine location1, location2 Distance# = oMap.Distance(location1, location2) There's a good example on MapPoint help under 'Distance Method' using both VB6 and C# Rgds, David |
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12-14-2006
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| Re: calculate straight line distance
Hi Francesco, In addition to the reply of David, if you have to do it with only latitude / longitude you can use this formula: Code: public static int CalcDistance(double lat1, double lon1, double lat2, double lon2, out int heading)
{
double lat = lat2 - lat1;
double lon = (lon2 - lon1) * Math.Cos(Tools.deg2rad((int)((lat1 + lat2) / 2)));
double dist = Math.Sqrt(lat * lat + lon * lon);
heading = Tools.rad2deg(Math.Acos(lat / dist));
if (lon < 0) // Western direction
heading = 360 - heading;
return (int)(dist * 60 * 1852);
}
private static double deg2rad(int degree)
{
return degree * Math.PI / 180;
}
private static int rad2deg(double rad)
{
return (int)(rad * 180 / Math.PI);
}
__________________ rgds, Wilfried Mestdagh www.mestdagh.biz MapPoint coding demo Order MapPoint 2009 with Routing and User Tools Spreadsheet |
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| Tags |
| calculate, distance, line, straight |
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| Discovering MapPoint Map Printing Capabilities - MapPoint Articles - MP2K Magazine | This thread | Refback | 12-19-2006 09:15 AM | |
| Pushpin Tool Add-in - MP2K Magazine | This thread | Refback | 12-13-2006 08:38 AM | |
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