[Qgis-user] New Projection Definition

[Grant Boxer]

I am trying to import a raster image of the North American geology

(https://ngmdb.usgs.gov/gmna/) and the projection is defined as Modified
spherical transverse Mercator with a central meridian of 100 deg W and a
scale factor of 0.926.

 

My attempt is here "+proj=tmerc +lat_0=0 +lon_0=-100 +k=0.9260000000000001
+x_0=0 +y_0=0 +a=6371204 +b=6371204 +units=m +no_defs" but this does not
work.

 

The shp files associated with the image have prj files as follows 

 

PROJCS["User_Defined_Transverse_Mercator",

GEOGCS["GCS_User_Defined",DATUM["D_User_Defined",

SPHEROID["User_Defined_Spheroid",6371204.0,0.0]],

PRIMEM["Greenwich",0.0],

UNIT["Degree",0.0174532925199433]],

PROJECTION["Transverse_Mercator"],

PARAMETER["False_Easting",0.0],

PARAMETER["False_Northing",0.0],

PARAMETER["Central_Meridian",-100.0],

PARAMETER["Scale_Factor",0.926],

PARAMETER["Latitude_Of_Origin",0.0],

UNIT["Meter",1.0]]

 

Can anyone suggest changes to my projection file that I would need for this?

 

Grant Boxer

Perth, Western Australia

 

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