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