[GRASS-user] Manually Defining Location

[Rich Shepard]

On Fri, 20 May 2011, Bryan Keith wrote:

> I'm not convinced that's a valid wkt description of the coordinate system
> you want.

Bryan,

   Let me back up and ask the question from a different point.

   Here's the WKT from one of the maps:

PROJCS["Project",
GEOGCS["GCS_North_American_1927",
DATUM["D_North_American_1927",
SPHEROID["Clarke_1866",6378206.4,294.9786982]],
PRIMEM["Greenwich",0.0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",500000.0],
PARAMETER["False_Northing",-2000000.0],
PARAMETER["Central_Meridian",-115.583333],
PARAMETER["Scale_Factor",0.9999],
PARAMETER["Latitude_Of_Origin",34.75],
UNIT["Foot_US",0.3048006096012192]]

   From this I created this proj4 description:

+proj=tmerc +datum=nad27 +ellipse=clrk66 +a=6378206.4 +b=294.9786982
+x_0=500000.0 +y_0=-2000000.0 +k_0=0.9999 +lat_0=34.75 +lon_0=-115.583333
+no_defs +units=us-ft

Is this an accurate description to use in creating the location? Does the
order matter?

Rich