Grid 3: Lambert conformal, secant or tangent, conic or bi-polar (normal or oblique)

Octets Key Type Content
7-8 Nx unsigned Nx number of points along x-axis
9-10 Ny unsigned Ny number of points along y-axis
11-13 latitudeOfFirstGridPoint signed La1 latitude of first grid point
14-16 longitudeOfFirstGridPoint signed Lo1 longitude of first grid point
17 resolutionAndComponentFlags codeflag Resolution and component flags (see Code table 7)
18-20 LoV signed LoV orientation of the grid; i.e. the east longitude value of the meridian which is parallel to the y-axis (or columns of the grid) along which latitude increases as the y-coordinate increases (the orientation longitude may or may not appear on a particular grid)
21-23 DxInMetres unsigned Dx x-direction grid length (see Note (2))
24-26 DyInMetres unsigned Dy y-direction grid length (see Note (2))
27 projectionCenterFlag unsigned Projection centre flag (see Note (5))
28 scanningMode codeflag Scanning mode (flags see Flag/Code table 8)
29-31 Latin1 signed Latin 1 first latitude from the pole at which the secant cone cuts the sphere
32-34 Latin2 signed Latin 2 second latitude from the pole at which the secant cone cuts the sphere
35-37 latitudeOfSouthernPole signed Latitude of the southern pole in millidegrees (integer)
38-40 longitudeOfSouthernPole signed Longitude of the southern pole in millidegrees (integer)
41-42 Set to zero (reserved)
Notes:

( 1) Latitude and longitude are in millidegrees (thousandths of a degree).

( 2) Grid lengths are in units of metres, at the secant cone intersection parallel nearest to the pole on the projection plane.

( 3) Latitude values are limited to the range 0-90 000; bit 1 is set to 1 to indicate south latitude.

( 4) Longitude values are limited to the range 0-360 000; bit 1 is set to 1 to indicate west longitude.

( 5) Octet 27 (projection centre flag):
bit 1 set to 0 if North Pole is on the projection plane
bit 1 set to 1 if South Pole is on the projection plane
bit 2 set to 0 if only one projection centre is used
bit 2 set to 1 if projection is bi-polar and symmetric.

( 6) If Latin 1 = Latin 2, then the projection is on a tangent cone.

( 7) The resolution flag (bit 1 of Code table 7) is not applicable.