ashtech DG16 Reference Manual page 196

Values are derived from tables which can be obtained from various sources,
including NGS Publication 62-4 (1986 Reprint) which also includes discussion and
definitions of applied formulas and parameters.
Table 6.73. UDG Structure for Lambert Conformal Conic for SPC27
Field
s1 Map projection type.
d2 Number of parameters for the selected projection
f3 False Easting or x coordinate of central meridian
f4 Longitude of Central meridian
f5 Map radius of central parallel (Fo)
f6 Map radius of lowest parallel of the projection table plus y
value on central meridian at this parallel (y = 0 in most cases)
f7 Scale (m) of the projection along the central parallel (Fo)
f8 Sine of latitude of central parallel (Fo) computed from basic
equations for Lambert projection with 2 standard parallel
Degree, minute portion of the rectifying latitude wo for Fo,
f9
latitude of origin
Remainder of wo
f10
f11 1/6 * Ro * No * 10^6
f12 tanFo / 24 * (Ro * No)^3/2] * 10^24
[(5 + 3 * tan^2 Fo)/120 * Ro * N0^3] * 10^32
f13
Number of parameters for the selected projection
f9: w = F - [1052.893882 - (4.483344 - 0.002352 * cos
cos F
f11/f12/f13: Ro = a * (1 - e
meridian plane at Fo
No = a / (1-e
Table 6.74. UDG Structure for Transverse Mercator for SPC27
Field
s1
d2
f3
176
Description
2
) / (1 - e
2 2 1/2
Fo) : radius of curvature in prime vertical at Fo
* sin
Description
Map projection type.
Number of parameters for the selected
projection
False Easting or x coordinate of central meridian
DG14 and DG16 Board & Sensor Reference Manual
2
2 2 3/2
Fo)
*sin : radius of curvature in
Range / Name
LC27
11
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
11
2
F) * cos F] * sin F *
Range / Name
TM27
6
T1