Matlab mapping toolbox help?

Question

Hi,

I need to contour pollution concentration which has a lat,lon coordinate pair attached. So (lat,lon,Z) where Z is the concentration of some pollutant. In order to contour the data using the matlab function "contourm" I need a georeferenced data grid. The matlab help file only tells you how to create a georeferenced grid if the data is equally spaced, using a reference vector. If the data is randomly spaced, how do I create 3 MxN matrices that I can put into contourm(lat,lon,Z)? Answers to this, as well as any other suggestions, are greatly appreciated. Thanks so much!

Answer 1

You could make "3D landscape" of your data and then interpolate new points. There should be some kind of function for this but I don't know any. You could also do your own:

Using your data as vertexes build 3D mesh (search triangles with smalles perimeter) and then iterpolate. Please let us know if you find such ready function, otherwise I might try to make on on friday.