Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided.¶¶The polynomial expressions are:¶¶      dLat seconds = A0 + (A1*lat) + (A2*lon) + (A3*H)¶      dLon seconds = B00 + B0 + (B1*lat) + (B2*lon) + (B3*H)¶¶where latitude lat and longitude lon are in decimal degrees referred to the Madrid 1870 (Madrid) geographic coordinate reference system and H is gravity-related height in metres.  B00 is the longitude (in seconds) of the Madrid meridian measured from the Greenwich meridian; it is the value to be applied to a longitude relative to the Madrid meridian to transform it to a longitude relative to the Greenwich meridan.¶¶The results of these expressions are applied through the formulae:¶Lat(ED50) = Lat(M1870(M))  + dLat¶and Lon(ED50) = Lon(M1870(M))  + dLon.