Regarding Data interpolation

I have some global dataset which includes latitude, longitude and CO2 value.

I am planning to plot 2D surface maps for certain area e.g Thailand. So far what I have done is

match=find(latitude<=21 & latitude <=6 & longitude 106,longitude =97);
lat_N=latitude (match);
lon_N=longitude(match);
co2_N=co2(match);

F=TriScatteredInterp(lon_N,lat_N,co2_N);% =TriScatteredInter

lat_Grid=6:0.5:21;
lon_Grid=97:0.5:106;
[xlongrid,ylatgrid]=meshgrid(lon_Grid,lat_Grid);

and then I plotted using sufracem function .

This shows me out put but its not good.

after this I tried griddata function too , but still it does not work.

So is there any one knows how to fix this problem.

Thank you

Answer 1

[bym]

Maybe getting the right data would help, your match variable contains some constraints I don't believe you intended. compare to:

match = find(latitude>=6 & latitude <=20 & longitude >= 97 & longitude <= 106)