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MapInfo Products Knowledge Base


Product: MapInfo Professional
Version: 8.x, 7.x, 6.x
Platform: All Windows Platforms
Category: Projections

Summary:
Projections using new ATS 77 ellipsoid within a custom datum.

Question:
The following is an example of two projected coordinate systems (Modified Transverse Mercator) that would take advantage of the new ATS77 (Average Terrestrial System 77) ellipsoid implemented in MapInfo version 6.0 for Nova Scotia.

Answer:
MTM Nova Scotia Zone 4(ATS77)", 8, 999, 51, 0, 0, 0, 7, -61.5, 0, 0.9999, 4500000, 0

Information for this taken from EPSG:

PROJCS["ATS77 / MTM Nova Scotia zone 4",GEOGCS["ATS77",DATUM["Average_Terrestrial_System_1977",SPHEROID["Average Terrestrial System
1977",6378135,298.257,AUTHORITY["EPSG",7041]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG",6122]],PRIMEM["Greenwich",0,AUTHORITY["EPSG",8901]],UNIT["DMSH",0.0174532925199433,AUTHORITY["EPSG",9108]],AXIS["Lat",NORTH],AXIS["Long",EAST],AUTHORITY["EPSG",4122]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-61.5],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",4500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG",9001]],AXIS["E",EAST],AXIS["N",NORTH],AUTHORITY["EPSG",2294]]

MTM Nova Scotia Zone 5(ATS77)", 8, 999, 51, 0, 0, 0, 7, -64.5, 0, 0.9999, 5500000, 0

Information for this taken from EPSG:

PROJCS["ATS77 / MTM Nova Scotia zone 5",GEOGCS["ATS77",DATUM["Average_Terrestrial_System_1977",SPHEROID["Average Terrestrial System 1977",6378135,298.257,AUTHORITY["EPSG",7041]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG",6122]],PRIMEM["Greenwich",0,AUTHORITY["EPSG",8901]],UNIT["DMSH",0.0174532925199433,AUTHORITY["EPSG",9108]],AXIS["Lat",NORTH],AXIS["Long",EAST],AUTHORITY["EPSG",4122]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-64.5],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",5500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG",9001]],AXIS["E",EAST],AXIS["N",NORTH],AUTHORITY["EPSG",2295]]

Last Modified: 09/12/2006 11:13:10 AM
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