How to plot contour lines on MATLAB?

Hello everyone.

I aim to plot contour lines showing rain fall values on the US map. Suppose that I have a double array having 3 coloumns showing latitude, longitude, and the corresponding value for the rainfall, respectively. Can anyone guide me how I can plot contours?

My main question is that whether I am required to convert longitude and latitude to cartesian coordinate system in order to plot contours or I can plot them just with having longitude and latitude of each point ( representative for each weather station)?

Thank you in advance for your help.

Answer 1

[Star Strider]

See if contourm will do what you want. (I do not have the Mapping Toolbox since I do not need it for what I do, so I have no experience with it.)