GRIB section 2, the grid description section
Latitude/longitude or equidistant cylindrical or plate carree grids
Gaussian grids
Sub-area of a quasi-regular gaussian grid
(ECMWF convention)
Spherical harmonic coefficients
Polar stereographic
Mercator
Lambert conformal, secant or tangent, conical or bi-polar (normal or oblique) or Albers equal-area, secant or tangent, conical or bi-polar (normal or oblique)
Space view perspective or orthographic
ECMWF ocean data