Latitude longitude to meters on Mars

Hello, I have to transform lat, lon to meters on Mars. I tried deg2km(..., 'mars'), but it doesn't work because this function consider mars as a sphere. Any idea?

Thank you.

[James Tursa]

Please clarify. Are you wanting to use an oblate spheroid for Mars? Are you trying to turn a lat-lon pair into a rectangular position vector? Are you trying to find the surface distance between two points? Or what?

[fabriziorosi92]

Thanks for your answer. I have to change the reference space from lat, lon to meters. Something like UTM coordinate system (or UPS for the poles).

[James Tursa]

So you are trying to implement this?

https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system

[fabriziorosi92]

Well, obviously not from scratch. I've seen something like that. But in my case it doesn't work with the flattening of Mars.

Pratically I need something that transform degrees in meters on an ellipsoid.

[Gabrielle Hedrick]

I'm going to comment on this in case someone else is looking for this (apparently I wasn't the only one!):

https://ode.rsl.wustl.edu/mars/pagehelp/quickstartguide/index.html?coordinate_system.htm

this page gives the radii taken into consideration for the coordinates. To change from degree to meters, calculate the circumference, divide by 360 and it gives a factor to go from degree to km.

Answer 1

[Matthias Walle]

Hello,

Are you looking for something like the Vincenty's formulae in Matlab? It is used to calculate the distance between two points on the surface of a spheroid.

this might be what you are looking for

you can change the parameters of the ellipsoid axis in the file for Mars I guess.

I hope this helped,

Matthias