Using Map Projections in GrADS

It is important to understand the distinction between the two uses of map projections when creating GrADS displays of your data:

GrADS supports two types of data grids:



Using Preprojected Grids





Polar Stereo Preprojected Data (coarse accuracy for NMC Models)



Lambert Conformal Preprojected Data



NMC Eta model (unstaggered grids)



NMC high accuracy polar stereo for SSM/I data



CSU RAMS Oblique Polar Stereo Grids



Pitfalls when using preprojected data



GrADS Display Projections



Summary and Plans