Pitney Bowes MapXtreme User Manual
Page 584
Appendix H: Elements of a Coordinate System
Custom Datums
MapXtreme v7.1
591
Developer Guide
The shift and rotation parameters describe the ellipsoid’s orientation in space, as compared to the
WGS 84 datum. It’s important to make sure that these parameters have the correct signs (positive or
negative). Usually, a document describing a local datum will list the parameters required to convert
23
Hough
6378270.0
297.0
31
IAG 75
6378140.0
298.257222
41
Indonesian
6378160.0
298.247
4
International 1924
6378388.0
297.0
49
Irish (WOFO)
6377542.178
299.325
3
Krassovsky
6378245.0
298.3
32
MERIT 83
6378137.0
298.257
33
New International 1967
6378157.5
298.25
43
NWL 10D
6378135.0
298.26
42
NWL 9D
6378145.0
298.25
44
OSU86F
6378136.2
298.25722
45
OSU91A
6378136.3
298.25722
46
Plessis 1817
6376523.0
308.64
54
Popular Visualization
6378137.0
0.0
52
PZ90
6378136.0
298.257839303
24
South American
6378160.0
298.25
12
Sphere
6370997.0
0.0
47
Struve 1860
6378297.0
294.73
34
Walbeck
6376896.0
302.78
25
War Office
6378300.583
296.0
26
WGS 60
6378165.0
298.3
27
WGS 66
6378145.0
298.25
1
WGS 72
6378135.0
298.26
28
WGS 84
6378137.0
298.257223563
Number
Ellipsoid
a
1/f