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Distances 'as the crow flies'
This is a discussion on Distances 'as the crow flies' within the MapPoint 2006/2009 Discussion forums, part of the Map Forums category; How do I calculate the straight line distances between two locations?...
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01-16-2007
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 Re: Distances 'as the crow flies'
Try googling for "Great Circle Distance" An implementation using latitude/longitude points in VB.Net would be: Calculate Distance and Radius in VB.NET - Visual Basic , VB.NET         |
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01-19-2007
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| Re: Distances 'as the crow flies'
Hi, Here is a code sample in Delphi: Code: function TRefPoints.GetDistance(Lat1, Lon1, Lat2, Lon2: double): integer; var Lat, Lon, Dist: double; begin Lat := Lat2 - Lat1; Lon := (Lon2 - Lon1) * Cos(DegToRad((Lat1 + Lat2) / 2)); Dist := Hypot(Lat, Lon); Result := Round(Dist * 1.852 * 60000); // meters end;
__________________ rgds, Wilfried Mestdagh www.mestdagh.biz MapPoint coding demo Order MapPoint 2009 with Routing and User Tools Spreadsheet |
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01-19-2007
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| Re: Distances 'as the crow flies'
Of course, since this is MapPoint we're dealing with... Look at the methods Map.Distance(Loc1,Loc2) and Location.DistanceTo(Loc) Can't believe I didn't mention this in my first reply. [Slaps head] |
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01-20-2007
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| Re: Distances 'as the crow flies'
Hi Paul, Agreed, but the latter is very slow. If it is needed to do many calcultions at once then own written is mutch faster.
__________________ rgds, Wilfried Mestdagh www.mestdagh.biz MapPoint coding demo Order MapPoint 2009 with Routing and User Tools Spreadsheet |
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| Posted By | For | Type | Date | |
| A More Compact Method for Obtaining Lat/Long - MapPoint Articles - MP2K Magazine | This thread | Refback | 01-17-2007 03:19 PM | |
| Microsoft MapPoint 2006 - MP2K Magazine | This thread | Refback | 01-17-2007 08:23 AM | |
| The Magazine for MapPoint - MP2K Magazine | This thread | Refback | 01-16-2007 04:30 PM | |
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| Thread | Thread Starter | Forum | Replies | Last Post |
| Getting Distances | cmarquez | MapPoint 2006/2009 Discussion | 13 | 10-17-2006 09:34 AM |
| Calculate distances | Anonymous | MapPoint 2006/2009 Discussion | 1 | 11-18-2004 10:58 AM |
| Batch Distances?! | Anonymous | MapPoint 2006/2009 Discussion | 0 | 01-21-2004 12:40 PM |
| Calculating distances from a route | Anonymous | MapPoint 2006/2009 Discussion | 0 | 07-18-2003 11:23 AM |
| hi, we are using mappoint to get distances for ou.... | Anonymous | MapPoint 2006/2009 Discussion | 3 | 07-05-2002 10:01 AM |
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