Comments on: WGS to UTM, UTM to WGS conversions, geo distance, azimuth and other geographical calculations in C#

By: Florine Hung

Florine Hung — Fri, 15 Jan 2010 00:57:06 +0000

Wow, discovered your webpage on Yahoo!.Happy I finally tested it out. Not sure if its my Safari browser,but sometimes when I visit your site, the fonts are really tiny? However, love your webpage and will check back.Bye

By: Jader Dias

Jader Dias — Fri, 26 Jun 2009 19:45:44 +0000

I tested your azimuth formula for all those angles: 0, 45, 90, 135, 180, 225, 270, 315. And sadly it didn’t work. Here’s my formula:

public double GetAzimuth(LatLng destination)
{
var longitudinalDifference = destination.Lng – this.Lng;
var latitudinalDifference = destination.Lat – this.Lat;
var azimuth = 0d;
if (latitudinalDifference == 0)
{
if (longitudinalDifference != 0)
{
azimuth = Math.PI / 2d;
}
}
else
{
if (latitudinalDifference < 0 && longitudinalDifference == 0)
{
azimuth = Math.PI;
}
else
{
azimuth = Math.Atan(longitudinalDifference / latitudinalDifference);
}
}
if (azimuth < 0)
{
azimuth += Math.PI;
}
if (longitudinalDifference < 0)
{
azimuth += Math.PI;
}
return azimuth;
}

public double GetDegreesAzimuth(LatLng destination)
{
return RadiansToDegreesConversionFactor * GetAzimuth(destination);
}

By: Tamir

Tamir — Thu, 08 Jan 2009 15:47:40 +0000

This is a part of another project, so I cannot post all sources. However this article includes all necessary information for you to start using it.

By: Rob G

Rob G — Thu, 08 Jan 2009 14:28:40 +0000

Can you post the VS project/code from yuor blog post: WGS to UTM, UTM to WGS conversions, geo distance, azimuth and other geographical calculations in C#
http://khason.net/blog/wgs-to-utm-utm-to-wgs-conversions-geo-distance-azimuth-and-other-geographical-calculations-in-c/

By: DotNetKicks.com

DotNetKicks.com — Thu, 01 Jan 2009 08:57:04 +0000

You’ve been kicked (a good thing) – Trackback from DotNetKicks.com

By: charles

charles — Thu, 01 Jan 2009 08:57:03 +0000

public static GeoPoint MapLatLonToXY(double phi, double lambda, double lambda0)

what is "phi"? 1.618... or 3,1415... ??

what is "lambda" and "lambda0" that I have to pass as parameter?