Re: [OpenMap Users] Rotation of map in Lambert projection

From: Rob Ratcliff <rratcliff_at_ticom-geo.com>
Date: Tue, 13 Feb 2007 11:10:21 -0600

Chris,

Would you mind defining a, ba and e?

I assume that "a" is equal to the first term (6378137)of the Spheroid
number below.

My northing values are off by a factor of ten so I think I need to tweak
these parameters for my SP coordinate system.

Thanks,

Rob

Rob Ratcliff wrote:
>
> p.s. Here is the definition of the SP coordinate system I'm using:
>
> /*
> * 32139 NAD_1983_StatePlane_Texas_Central_FIPS_4203
> *
> PROJCS["NAD_1983_StatePlane_Texas_Central_FIPS_4203",GEOGCS["GCS_North_American_1983",DATUM["D_North_Ameri
>
> *
> can_1983",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]
>
> *
> ],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",700000],PARAMETER["False_Northing",3000000],
>
> *
> PARAMETER["Central_Meridian",-100.3333333333333],PARAMETER["Standard_Parallel_1",30.11666666666667],PARAMETE
>
> *
> R["Standard_Parallel_2",31.88333333333333],PARAMETER["Latitude_Of_Origin",29.66666666666667],UNIT["Meter",1]]
>
> *
> http://www.cnr.colostate.edu/class_info/nr502/lg3/datums_coordinates/spcs.html
>
> * lines.append("<ENVELOPE minx='3112576.5229230225'
> miny='10112154.75590226' " +
> * "maxx='3112956.9819749305' maxy='10112501.491367795' " +
> * "name='Initial_Extent' />");
> */
>
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Received on Tue Feb 13 2007 - 13:17:26 EST

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