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Get Azimuth value from point A to point B

MohamadFathin

Hi,

May i know how can i get a azimuth value between 2 points?

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TedKowal

Calculating a bearing distance—Help | ArcGIS Desktop

How to Calculate Azimuth in Excel | It Still Works

Now if you can script in Excel this is a custom function I use for determining Azimuths..

I use it in excel like this... =Azimuth(cell with Latitude1, cell with Longitude1, cell with Latitude1, cell with Longitude2)

eg. =Azimuth(A1,B1,A2,B2)

Function <SPAN class="token function">Azimuth</SPAN><SPAN class="punctuation token">(</SPAN>lat1 As Single<SPAN class="punctuation token">,</SPAN> lat2 As Single<SPAN class="punctuation token">,</SPAN> lon1 As Single<SPAN class="punctuation token">,</SPAN> lon2 As Single<SPAN class="punctuation token">)</SPAN> As Single

Dim X1 As Single<SPAN class="punctuation token">,</SPAN> X2 As Single<SPAN class="punctuation token">,</SPAN> Y As Single<SPAN class="punctuation token">,</SPAN> dX As Single<SPAN class="punctuation token">,</SPAN> dY As Single

With Application<SPAN class="punctuation token">.</SPAN>WorksheetFunction
    X1 <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="token function">Radians</SPAN><SPAN class="punctuation token">(</SPAN>lat1<SPAN class="punctuation token">)</SPAN>
    X2 <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="token function">Radians</SPAN><SPAN class="punctuation token">(</SPAN>lat2<SPAN class="punctuation token">)</SPAN>
    Y <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="token function">Radians</SPAN><SPAN class="punctuation token">(</SPAN>lon2 <SPAN class="operator token">-</SPAN> lon1<SPAN class="punctuation token">)</SPAN>
End With

    dX <SPAN class="operator token">=</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Cos</SPAN><SPAN class="punctuation token">(</SPAN>X1<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Sin</SPAN><SPAN class="punctuation token">(</SPAN>X2<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">-</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Sin</SPAN><SPAN class="punctuation token">(</SPAN>X1<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Cos</SPAN><SPAN class="punctuation token">(</SPAN>X2<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Cos</SPAN><SPAN class="punctuation token">(</SPAN>Y<SPAN class="punctuation token">)</SPAN>
    dY <SPAN class="operator token">=</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Cos</SPAN><SPAN class="punctuation token">(</SPAN>X2<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> Math<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Sin</SPAN><SPAN class="punctuation token">(</SPAN>Y<SPAN class="punctuation token">)</SPAN>


With Application<SPAN class="punctuation token">.</SPAN>WorksheetFunction
    Azimuth <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="token function">Degrees</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">Atan2</SPAN><SPAN class="punctuation token">(</SPAN>dX<SPAN class="punctuation token">,</SPAN> dY<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
End With

End Function<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Nicholas-Furness

Use the GeometryEngine.DistanceGeodetic method. The result, a GeodeticDistanceResult, includes the azimuths between the two points.

MohamadFathin

I try using the method for calculate to get the azimuth between 2 point, but i am not understand these two functions:

private readonly LinearUnit _metersUnit;
private readonly AngularUnit _degreesUnit;

below is the code i try to implement, sorry i am new to c#

private void CreatePoints()
{
// Create a red circle simple marker symbol
SimpleMarkerSymbol redCircleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, System.Drawing.Color.FromArgb(0xFF, 0xFF, 0x00, 0x00), 10);
MapPoint mapPoint1 = new MapPoint(-2.72, 56.065, SpatialReferences.Wgs84);
MapPoint mapPoint2 = new MapPoint(-2.69, 56.065, SpatialReferences.Wgs84);
// Create graphics and add them to graphics overlay
Graphic graphic = new Graphic(mapPoint1, redCircleSymbol);
_overlay.Graphics.Add(graphic);
graphic = new Graphic(mapPoint2, redCircleSymbol);
_overlay.Graphics.Add(graphic);
GeodeticDistanceResult distance = GeometryEngine.DistanceGeodetic(mapPoint1, mapPoint2, _metersUnit, _degreesUnit, GeodeticCurveType.Geodesic);
}

Nicholas-Furness

Hi Mohamad Fathin,

You could set them up something like this:

<SPAN class="keyword token">private</SPAN> <SPAN class="keyword token">readonly</SPAN> LinearUnit _metersUnit <SPAN class="operator token">=</SPAN> LinearUnits<SPAN class="punctuation token">.</SPAN>Meters<SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">private</SPAN> <SPAN class="keyword token">readonly</SPAN> AngularUnit _degreesUnit <SPAN class="operator token">=</SPAN> AngularUnits<SPAN class="punctuation token">.</SPAN>Degrees<SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

or just call DistanceGeodetic like this:

GeodeticDistanceResult distance <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">DistanceGeodetic</SPAN><SPAN class="punctuation token">(</SPAN>mapPoint1<SPAN class="punctuation token">,</SPAN> mapPoint2<SPAN class="punctuation token">,</SPAN> LinearUnits<SPAN class="punctuation token">.</SPAN>Meters<SPAN class="punctuation token">,</SPAN> AngularUnits<SPAN class="punctuation token">.</SPAN>Degrees<SPAN class="punctuation token">,</SPAN> GeodeticCurveType<SPAN class="punctuation token">.</SPAN>Geodesic<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

See LinearUnits and AngularUnits.

Hope that helps!

Nick.

MohamadFathin

HI Nicholas Furness‌

I get below error, did you know how to settle this issues?

System.InvalidOperationException
HResult=0x80131509
Message=Invalid id for creating a unit
Source=Esri.ArcGISRuntime
StackTrace:
at Esri.ArcGISRuntime.Geometry.Unit.FromUnitId(Int32 unitId)
at Esri.ArcGISRuntime.Geometry.LinearUnits.get_Meters()
at ArcGISControl.MainWindow..ctor() in C:\Users\mfathin.CSYSINT\Documents\Visual Studio 2017\Projects\ArcGISControl\ArcGISControl\MainWindow.xaml.cs:line 32
Inner Exception 1:
DllNotFoundException: Unable to load DLL 'RuntimeCoreNet.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

This my code:

private readonly LinearUnit _metersUnit = LinearUnits.Meters;
private readonly AngularUnit _degreesUnit = AngularUnits.Degrees;
private void CreatePoints()
{
// Create a red circle simple marker symbol
SimpleMarkerSymbol redCircleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, System.Drawing.Color.FromArgb(0xFF, 0xFF, 0x00, 0x00), 10);
MapPoint mapPoint1 = new MapPoint(-2.72, 56.065, SpatialReferences.Wgs84);
MapPoint mapPoint2 = new MapPoint(-2.69, 56.065, SpatialReferences.Wgs84);
// Create graphics and add them to graphics overlay
graphic1 = new Graphic(mapPoint1, redCircleSymbol);
_overlay.Graphics.Add(graphic1);
graphic2 = new Graphic(mapPoint2, redCircleSymbol);
_overlay.Graphics.Add(graphic2);
//CreateLinePoint();

GeodeticDistanceResult distance = GeometryEngine.DistanceGeodetic(mapPoint1, mapPoint2, _metersUnit, _degreesUnit, GeodeticCurveType.Geodesic);
textBox.Text = string.Format("Distance:{0} | Azimuth:{1}", _metersUnit.UnitType.ToString(), _degreesUnit.UnitType.ToString());

NathanCastle1

Hi,

I tried the code locally and found the following worked for the basic use case of finding the azimuth values:

MapPoint mapPoint1 <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">MapPoint</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">2.72</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">56.065</SPAN><SPAN class="punctuation token">,</SPAN> SpatialReferences<SPAN class="punctuation token">.</SPAN>Wgs84<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

MapPoint mapPoint2 <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">MapPoint</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">2.69</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">56.065</SPAN><SPAN class="punctuation token">,</SPAN> SpatialReferences<SPAN class="punctuation token">.</SPAN>Wgs84<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

GeodeticDistanceResult distance <SPAN class="operator token">=</SPAN> GeometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">DistanceGeodetic</SPAN><SPAN class="punctuation token">(</SPAN>mapPoint1<SPAN class="punctuation token">,</SPAN> mapPoint2<SPAN class="punctuation token">,</SPAN> LinearUnits<SPAN class="punctuation token">.</SPAN>Meters<SPAN class="punctuation token">,</SPAN> AngularUnits<SPAN class="punctuation token">.</SPAN>Degrees<SPAN class="punctuation token">,</SPAN> GeodeticCurveType<SPAN class="punctuation token">.</SPAN>Geodesic<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

MessageBox<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Show</SPAN><SPAN class="punctuation token">(</SPAN>$<SPAN class="string token">"Distance:{distance.Distance} | Azimuth1:{distance.Azimuth1} | Azimuth2:{distance.Azimuth2}"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

That is essentially what you had, and based on the error message you shared (Unable to load DLL 'RuntimeCoreNet.dll': The specified module could not be found), this looks like a deployment issue.

Did you use Nuget to reference the ArcGIS Runtime SDK? Have you tried cleaning, clearing the bin/ and obj/ folders, and then rebuilding?

MohamadFathin

Hi ,

Thank you for your answer. I manage to get the azimuth from point 1 to point 2 and vice versa. One thing that i want to know. The azimuth start from 0 to 180 for clock wise and -0 to -180 for anti-clockwise. After the 180 on clockwise the degree become negative that start with -180 until -0. How can i make azimuth from 0 to 360 ?

Nicholas-Furness

If the value is < 0, add 360. -179 becomes 181. -10 becomes 350, etc.

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