Distance and azimuth between two cities Calculator

Calculates the distance and azimuth between two cities.

Calculation assumes that the Earth is a sphere with a radius of 6378km.
Input negative degree for west longtitude and south latitude.

Distance and azimuth between two cities
city A:
    1.  
    1. Longitude
    2. ,
    3. Latitude
    1.  
city B:
    1.  
    1. Longitude
    2. ,
    3. Latitude
    1. [ Earth's radius r
    2. km
    3. ]

Compass from A to B

place A(x1, y1)、place B(x2, y2)

Distance and azimuth between two cities
[1-10] /17Disp-Num
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[1]  2019/01/20 06:47   Male / 60 years old level or over / A retired person / Very /
Purpose of use
Find direction of distant location so that HF radio antenna can be rotated to point at target city/country.
[2]  2019/01/09 05:38   Male / 40 years old level / Others / Very /
Purpose of use
Direction to the Holy Land for prayer.
Comment/Request
Praise the Lord God.
[3]  2018/12/28 01:13   Male / 60 years old level or over / A retired person / Very /
Purpose of use
Finding relative location of city I will be flying to Jan 2018...
Chicago to Quito, Ecuador = about 166.55 deg
Surprising...thought more Southwesterly..
Thank you...Scott
[4]  2018/08/27 04:50   Male / 60 years old level or over / An engineer / Very /
Purpose of use
Find direction to aim antenna for amateur radio
Comment/Request
Suggestion: Allow typing the name of a city or a state/province postal abbreviation, sometimes that''s faster than finding a name on a menu.
[5]  2018/05/28 03:37   Male / 60 years old level or over / A retired people / - /
Purpose of use
Educational
Comment/Request
Casa Grande, Az to MIlford, Ct
[6]  2018/03/28 01:51   Male / 40 years old level / An office worker / A public employee / Very /
Purpose of use
Needed to know the exact bearing to flip off some annoying coworkers in our overseas office.
[7]  2018/02/22 23:01   Male / 50 years old level / An office worker / A public employee / Useful /
Purpose of use
Curiosity
[8]  2017/08/18 17:24   Male / 20 years old level / An engineer / Useful /
Purpose of use
Project
Comment/Request
Can you please add the elevation part into it.
[9]  2017/02/15 06:30   Male / 60 years old level or over / High-school/ University/ Grad student / Very /
Purpose of use
to compute the azimuth betwen Casablanca (Great Mosque Hassan II) and Mecca
[10]  2016/08/30 06:42   Male / 60 years old level or over / A retired people / A little /
Purpose of use
calculate the angle in degree between two locations.
Comment/Request
Could you please help me with this problem. I need a way to calculate the angle between two cities like Los Angles and New York. Calculators show the azimuth not the angle. Some cities have a 30 degree angle between them etc. I need a calculator not a mathematical formula. Does one exist. Thanks, al

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