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This page updated: February, 2011


Adapted From: GCTP General Cartographic Transformation Package February 1996..1998 Version 2.0

Appendix A: Projection Transformation Package Projection Parameters



15: Projection 16: Units 17: UTM Zone {Required only for Projection 1: UTM}

18: Datum 19: Spheroid 20: State Plane Zone {Required only for Projection 2: State Plane}



Code & Projection Id 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
0 Geographic . . . . . . . . . . . . .
1 UTM (utm) [zone] SMajor? SMinor? Factor? . . . . . . . . . .
2 State Plane (stpl) [zone] Sphere . . . . . . . . . . . .
3 Albers Equal Area

(alber)

SMajor SMinor STDPR1 STDPR2 CentMer OriginLat FE FN . . . . .
. . . . . . . . . . . . . .
4 Lambert Conformal C (lamcc) SMajor SMinor STDPR1 STDPR2 CentMer OriginLat FE FN . . . . .
. . . . . . . . . . . . . .
5 Mercator (mer) SMajor SMinor . . CentMer TrueScale FE FN . . . . .
. . . . . . . . . . . . . .
6 Polar Stereographic (ps) SMajor SMinor . . LongPol TrueScale FE FN . . . . .
. . . . . . . . . . . . . .
7 Polyconic (poly) SMajor SMinor . . CentMer OriginLat FE FN . . . . .
. . . . . . . . . . . . . .
8 Equid. Conic A (eqcon)

Equid. Conic B

SMajor SMinor StdPar

STDPR1

---------

STDPR2

CentMer

CentMer

OriginLat FE

FE

FN

FN

0 Mode

1

. . . .
. . . . . . . . . . . . . .
9 Transverse Mercator

(tm)

SMajor SMinor Factor . CentMer OriginLat FE FN . . . . .
. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
10 Stereographic

(ster)

SMajor . . . CentLon OriginLat FE FN . . . . .
. . . . . . . . . . . . . .
11 Lambert Azimuthal (lamaz) Sphere . . . CentLon CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
12 Azimuthal Equidistant (azim) Sphere . . . CentLon CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
13 Gnomonic

(gnom)

Sphere . . . CentLon CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
14 Orthographic

(orth)

Sphere . . . CentLon CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
15 Gen. Vert. Near Per

(gvnsp)

Sphere . Height . CentLon CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
16 Sinusoidal

(sin)

Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
17 Equirectangular

(equi)

Sphere . . . CentMer TrueScale FE FN . . . . .
. . . . . . . . . . . . . .
18 Miller Cylindrical

(mill)

Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
19 Van der Grinten

(vandq)

Sphere . . . CentMer OriginLat FE FN . . . . .
. . . . . . . . . . . . . .
20 Hotin Oblique Merc A

Hotin Oblique Merc B

(omer)

SMajor Sminor

SMinor

Factor

Factor



AziAng


AzmthPt
OriginLat

OriginLat

FE FN Long1 Lat1 Long2 Lat2 0

1

. . . . . . . . . . . . . .
21 Robinson

(rob)

SMajor . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
22 Space Oblique Merc A

Space Oblique Merc B

(som)

Smajor

SMajor

Sminor

SMinor



Satnum


Path
AscLong IncAng FE

FE

FN

FN

PSRev LRat Pflag . 0

1

. . . . . . . . . . . . . .
23 Alaska Conformal

(alcon)

SMajor SMinor . . CentMer CenterLat FE FN . . . . .
. . . . . . . . . . . . . .
24 Interrupted Goode HEA (good) Sphere . . . . . . . . . . . .
. . . . . . . . . . . . . .
25 Mollweide (molw) Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
26 Interrupt Mollweide

(imolw)

Sphere . . . . . . . . . . . .
. . . . . . . . . . . . . .
27 Hammer (ham) Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 Wagner IV (wiv) Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
29 Wagner VII (wvii) Sphere . . . CentMer . FE FN . . . . .
. . . . . . . . . . . . . .
30 Oblated Equal Area

(obleq)

Sphere . Shapem Shapen CentLon CenterLat FE FN Angle . . . .
. . . . . . . . . . . . . .

where

UTM: a UTM zone code must be specified for Projection 1: UTM

State Plane: To use NAD27 zone code set datum = 0; to use NAD83 zone code, set datum = 8.

Also Requires data per transform: TM, Lambert Conformal, Polyconic, Hotine

Smajor Semi-major axis of ellipsoid. If zero, Clarke 1866 in meters is assumed.

Sminor Eccentricity squared of the ellipsoid if less than zero, if zero, a spherical form is assumed, or if greater than zero, the semi-minor axis of ellipsoid.

Sphere Radius of reference sphere. If zero, 6370997 meters is used.{NOT Spheroid #}

STDPAR Latitude of the standard parallel (#8 only)

STDPR1 Latitude of the first standard parallel

STDPR2 Latitude of the second standard parallel

CentMer Longitude of the central meridian

OriginLat Latitude of the projection origin

FE False easting in the same units as the semi-major axis

FN False northing in the same units as the semi-major axis

TrueScale Latitude of true scale

LongPol Longitude down below pole of map (#6 Polar)

Factor Scale factor at central meridian (Transverse Mercator) or center of projection (Hotine Oblique Mercator)

CentLon Longitude of center of projection

CenterLat Latitude of center of projection

Height Height of perspective point (#15)





HOM: Mode in Column 12

Long1 Longitude of first point on center line (Hotine Oblique Mercator, format A)

Long2 Longitude of second point on center line (Hotine Oblique Mercator, format A)

Lat1 Latitude of first point on center line (Hotine Oblique Mercator, format A)

Lat2 Latitude of second point on center line (Hotine Oblique Mercator, format A)

AziAng Azimuth angle east of north of center line (Hotine Oblique Mercator, format B)

AzmthPt Longitude of point on central meridian where azimuth occurs (Hotine Oblique Mercator, format B)

SOM: Mode in Column 12

IncAng Inclination of orbit at ascending node, counter-clockwise from equator (SOM, format A)

AscLong Longitude of ascending orbit at equator (SOM, format A)

PSRev Period of satellite revolution in minutes (SOM, format A)

LRat Landsat ratio to compensate for confusion at northern end of orbit (SOM, format A -- use 0.5201613)

PFlag End of path flag for Landsat: 0 = start of path, 1 = end of path (SOM, format A)

Satnum Landsat Satellite Number (SOM, format B)

Path Landsat Path Number (Use WRS-1 for Landsat 1, 2 and 3 and WRS-2 for Landsat 4, 5 and 6.) (SOM, format B)

OEA:

Shapem Oblated Equal Area oval shape parameter m

Shapen Oblated Equal Area oval shape parameter n

Angle Oblated Equal Area oval rotation angle Theta

NOTES: Array elements 13 and 14 are set to zero. All array elements with blank fields are set to zero.

All angles (latitudes, longitudes, azimuths, etc.) are entered in packed degrees/ minutes/ seconds (DDDMMMSSS.SS) format

Decimal Degrees (DDD.ddd) format

The following notes apply to the Space Oblique Mercator A projection.

A portion of Landsat rows 1 and 2 may also be seen as parts of rows 246 or 247. To place these locations at rows 246 or 247, set the end of path flag (parameter 10) to 1--end of path. This flag defaults to zero. When Landsat-1,2,3 orbits are being used, use the following values for the specified parameters:

Parameter 3 099005031.2 Parameter 4 128.87 degrees - (360/251 * path number) in packed DMS format

Parameter 8 103.2669323 Parameter 9 0.5201613

When Landsat-4,5 orbits are being used, use the following values for the specified parameters:

Parameter 3 098012000.0 Parameter 4 129.30 degrees - (360/233 * path number) in packed DMS format

Parameter 8 98.884119 Parameter 9 0.5201613

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Copyright 1991..2011 by Ivan Lee Herring