Finding curvature of a route, set by coordinates

I have a spreadsheet containing data about a vehicle's location in terms of longitude and latitude. I have converted this into a cartesian plot using the latlon2local function, which turns out fine and is below:

The spreadsheet is attached.

My question is, how do I get some sort of plot of the radii of curvature of the turns around that route? I want to find how 'steep' the turns are, and preferably what angle the turn goes through. The spreadsheet also contains angular data (it's column 6), but I find it tedious to match every turn manually with the angle (as I have lots of datasets like this one).

Please let me know if you need any clarification.

The code to make the plot above is laid out below:

A = readmatrix("20181026075227_947BE7249B00.csv");

figure(2)
%column 3 is longitude, column 4 is latitude
%normalise coordinates wrt the first points
[xEast, yNorth] = latlon2local(A(:, 4), A(:, 3), 0, [A(1, 4), A(1, 3), 0]);
plot(xEast, yNorth)
xlabel('X (m)')
ylabel('Y (m)')
title('Route')
grid on;

[Amritz Ansara]

Basically what I want is to find how many 90 degree corners of radius 15m are in the route, etc.