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Calculate distance from geographics points

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RAFFAELE MAGLIONE
RAFFAELE MAGLIONE 2022-4-25
评论： RAFFAELE MAGLIONE 2022-4-26
Hi, I have two vectors of coordinates, latitude and longitude, of points describing the centerline of a track. I want to create a distance channel to plot some quantities (e.g. velocity) as function of this distance, how can I create a distance channel of the same numerosity of the two vectors of coordinates?

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KSSV
KSSV 2022-4-25
编辑：KSSV 2022-4-25
USe Haversine's formula:
Let (lon1,lat1) and (lon2,lat2) be your coordinates in degrees.
% Haversine formula
dlon = lon2 - lon1 ;
dlat = lat2 - lat1 ;
a = sind(dlat/2)^2 + cos(dlat1)*cosd(lat2)*sin(dlon/2)^2 ;
c = 2*asind(sqrt(a)) ;
d = 6367*c ; % distance in km
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Bruno Luong
Bruno Luong 2022-4-26
编辑：Bruno Luong 2022-4-26
Ran in:
Just wonder do you have you long / lat in degree or radian?
My code supposes long/lat in radian as you see it use cos function on them.
180/pi % ratio bewteen rad and deg
ans = 57.2958
RAFFAELE MAGLIONE
RAFFAELE MAGLIONE 2022-4-26
I was working with degrees, now with radian return the exact length, thank you!

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