AppInventor: Menghitung Jarak dan Arah dari GPS - Revision history

Onnowpurbo: /* Menghitung Arah */

2015-10-10T22:42:27Z

Menghitung Arah

← Older revision		Revision as of 22:42, 10 October 2015
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	Y = cos θa * sin θb – sin θa * cos θb * cos ∆L		Y = cos θa * sin θb – sin θa * cos θb * cos ∆L

			==Menghitung Arah==


			Formula:

			θ = atan2( sin Δλ ⋅ cos φ2 , cos φ1 ⋅ sin φ2 − sin φ1 ⋅ cos φ2 ⋅ cos Δλ )

			JavaScript:
			(all angles
			in radians)

			var y = Math.sin(λ2-λ1) * Math.cos(φ2);
			var x = Math.cos(φ1)*Math.sin(φ2) -
			Math.sin(φ1)Math.cos(φ2)Math.cos(λ2-λ1);
			var brng = Math.atan2(y, x).toDegrees();

	==Arah Kiblat==		==Arah Kiblat==

2015-10-10T22:39:35Z

Menghitung Jarak

← Older revision		Revision as of 22:39, 10 October 2015
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			==Menghitung Jarak dengan 'Haversine' Formula==

			Haversine
			formula:
			a = sin²(Δφ/2) + cos φ1 ⋅ cos φ2 ⋅ sin²(Δλ/2)
			c = 2 ⋅ atan2( √a, √(1−a) )
			d = R ⋅ c

			where φ is latitude, λ is longitude, R is earth’s radius (mean radius = 6,371km);
			note that angles need to be in radians to pass to trig functions!

			JavaScript:

			var R = 6371000; // metres
			var φ1 = lat1.toRadians();
			var φ2 = lat2.toRadians();
			var Δφ = (lat2-lat1).toRadians();
			var Δλ = (lon2-lon1).toRadians();

			var a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
			Math.cos(φ1) * Math.cos(φ2) *
			Math.sin(Δλ/2) * Math.sin(Δλ/2);
			var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
			var d = R * c;

			Ref: http://www.movable-type.co.uk/scripts/latlong.html

	==Menghitung Arah==		==Menghitung Arah==

2015-10-10T13:41:26Z

Arah Kiblat

← Older revision		Revision as of 13:41, 10 October 2015
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	phi = lat*PI/180.0;		phi = lat*PI/180.0;
	lambda = lon*PI/180.0;		lambda = lon*PI/180.0;
	psi = 180.0/PI~~Math.~~atan2(~~Math.~~sin(lambdaK-lambda), ~~Math.~~cos(phi)~~Math.~~tan(phiK)-~~Math.~~sin(phi)*~~Math.~~cos(lambdaK-lambda));		psi = 180.0/PIatan2(sin(lambdaK-lambda), cos(phi)tan(phiK)-sin(phi)*cos(lambdaK-lambda));
	return Math.round(psi);		return Math.round(psi);

2015-10-10T13:40:31Z

Arah Kiblat

2015-10-10T13:38:41Z

Arah Kiblat

2015-10-10T13:36:39Z

← Older revision		Revision as of 13:36, 10 October 2015
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	~~==Arah Kiblat==~~

	~~PI = Math.PI;~~
	~~phiK = 21.4*PI/180.0;~~
	~~lambdaK = 39.8*PI/180.0;~~
	~~phi = lat*PI/180.0;~~
	~~lambda = lon*PI/180.0;~~
	~~psi = 180.0/PIMath.atan2(Math.sin(lambdaK-lambda), Math.cos(phi)Math.tan(phiK)-Math.sin(phi)*Math.cos(lambdaK-lambda));~~
	~~return Math.round(psi);~~

	~~Ref: http://www.islamicsoftware.org/qibla/qibla.html~~

	==Menghitung Arah==		==Menghitung Arah==
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			==Arah Kiblat==

			PI = Math.PI;
			phiK = 21.4*PI/180.0;
			lambdaK = 39.8*PI/180.0;
			phi = lat*PI/180.0;
			lambda = lon*PI/180.0;
			psi = 180.0/PIMath.atan2(Math.sin(lambdaK-lambda), Math.cos(phi)Math.tan(phiK)-Math.sin(phi)*Math.cos(lambdaK-lambda));
			return Math.round(psi);

			Ref: http://www.islamicsoftware.org/qibla/qibla.html

	==Referensi==		==Referensi==

2015-10-10T13:35:34Z

Arah Kiblat

2015-10-10T13:34:42Z

Menghitung Jarak

← Older revision		Revision as of 13:34, 10 October 2015
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	x = 69.1 * (lat2 - lat1)		x = 69.1 * (lat2 - lat1)
	y = 69.1 * (lon2 - lon1) * cos(lat1/57.3)		y = 69.1 * (lon2 - lon1) * cos(lat1/57.3)


			==Arah Kiblat==

			phiK = 21.4*PI/180.0;
			lambdaK = 39.8*PI/180.0;
			phi = lat*PI/180.0;
			lambda = lon*PI/180.0;
			psi = 180.0/PIMath.atan2(Math.sin(lambdaK-lambda), Math.cos(phi)Math.tan(phiK)-Math.sin(phi)*Math.cos(lambdaK-lambda));
			return Math.round(psi);

			Ref: http://www.islamicsoftware.org/qibla/qibla.html

	==Menghitung Arah==		==Menghitung Arah==

2015-10-10T10:15:20Z

@@ Line 1: / Line 1: @@
 Sumber: https://sites.google.com/site/appinventor/distance-based-on-lat-long
   distance = sqrt(x^2 + y^2)
@@ Line 7: / Line 11: @@
   x = 69.1 * (lat2 - lat1)
   y = 69.1 * (lon2 - lon1) * cos(lat1/57.3)
@@ Line 13: / Line 30: @@
 * https://sites.google.com/site/appinventor/distance-based-on-lat-long

2015-10-10T10:03:30Z

← Older revision		Revision as of 10:03, 10 October 2015
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	Sumber: https://sites.google.com/site/appinventor/distance-based-on-lat-long		Sumber: https://sites.google.com/site/appinventor/distance-based-on-lat-long

	distance = sqrt(x2 + y2)		distance = sqrt(x^2 + y^2)

	Dimana:		Dimana: