MATLAB: Does lla2flat() return a negative altitude

Aerospace Toolboxlla2flatMATLAB

Example:
>> lla2flat([47.1168  -88.5394  161.5260],  [47.1167  -88.5393],  0, 0)
ans =
     11.1173   -7.5890 -161.5260

Best Answer

Dereck - check the Algorithms section from lla2flat: The flat Earth z-axis value is the negative altitude minus the reference height (href).
Since your reference height is zero, then the z-axis value is simply -161.5260.
Related Question