Radius from a GPS trajectory

Hello,

I have a table with three variables, from a car driving arround a circuit: distance in meters, latitude and longitude in degress (decimals).

I would like to calculate a fourth column with the corner radius (in meters) that the car is doing in each point, in other words, the radius of the gps lines when they are plotted as if each small segment was part of single circle.

Of course, the result will tend to infinite when the car is in a straight line, but this is for me not an issue.

My best attempt was creating a function like that:

for i = 1:(numel(Map.Distance)-3)

xTemp = Map.Latitude(i:i+3);

yTemp = Map.Longitude(i:i+3);

Map.Radius(i) = circfit(xTemp, yTemp);

end

Function circfit was this one: https://de.mathworks.com/matlabcentral/fileexchange/5557-circle-fit

But this is not really working... Any ideas?

[Mathieu NOE]

hello

lokk here :

Curvature of a 1D curve in a 2D or 3D space - File Exchange - MATLAB Central (mathworks.com)

[Joseph Cheng]

you should convert lat-lon into meters..