By grd file, I mean csv like file, with one line by value, like X1 Y1 Z1 X2 Y1 Z2 X3 Y1 Z3 ... X1 Y2 Zk X2 Y2 Zk+1 ... Xi Yj Zn this is in geographic format, where there is a repetition in the X values and the Y values, because the grid is regular, but not in lambert projection, then I can't retrieve the dimensions of the grid.
Le Vendredi 20 Avril 2007 14:54, Jeff Whitaker a écrit : > Lionel Roubeyrie wrote: > > Hi Jeff, > > yes, lambert is not the problem, you're right. I have some .grd files > > with x,y,z values, and I want to project z values on maps and interpolate > > them. I don't have the dimensions of the shape, but with m.scatter(x, y, > > z), I see that the scatters are displayed in a regular grid. Then is > > there a way to retrieve the dimensions of the resulting grid, and then I > > can reshape z to pass it to contourf? > > Lionel: There should be an attribute or attributes in the netCDF file > that specify the dimensions of the grid (at least there should be, > according to the GMT documentation). > > > I tried to convert x and y to degrees, hoping removing the duplicated > > entries (with rouding) gives me the dimensions, but I also have a problem > > with m(x,y,inverse=True), because the results are not good ( I use m = > > Basemap(llcrnrlon=0.5, llcrnrlat=44.8, urcrnrlon=2.8, urcrnrlat=46.5, > > projection='lcc', lat_1=45.89891889,lat_2=47.69601444,lon_0=2.33722917)). > > thanks > > You shouldn't need to do that - just pass x,y and the reshaped z to > contourf. You do need to know the parameters of the projection though. > > -Jeff -- Lionel Roubeyrie - [EMAIL PROTECTED] Chagé d'études et de maintenance LIMAIR - la Surveillance de l'Air en Limousin http://www.limair.asso.fr ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
