Re: [Geographiclib-users] defining a projection (modified)

[Shaun W. <sha...@gm...>]

Proj.4 is widely used for this, and might be a good starting point.
Transverse mercator is '+proj=tmerc' in Proj.4 parlance:
  http://trac.osgeo.org/proj/

On Mon, Dec 10, 2012 at 4:19 AM, hugh <hd...@bi...> wrote:

> Hi,
> I am wanting to convert eastings and northings into lats and longs.
> I am a civil engineer, not a surveyor, but have dabbled with
> projections in the past so know a little.
>
> I have been told my E / N are in a pseudo AMG (UTM) projection.  I have
> been given the following parameters:
>
>
> PSEUDO AMG 1966
>
> Projection: Transverse_Mercator
> False_Easting: 500000.000000
> False_Northing: 10000000.000000
> Central_Meridian: 145.000000
> Scale_Factor: 1.000000
> Latitude_Of_Origin: 0.000000
> Linear Unit: Meter (1.000000)
>
> Geographic Coordinate System: GCS_Australian_1966
> Angular Unit: Degree (0.017453292519943299)
> Prime Meridian: Greenwich (0.000000000000000000)
> Datum: D_Australian_1966
>   Spheroid: Australian
>     Semimajor Axis: 6378160.000000000000000000
>     Semiminor Axis: 6356774.719195305400000000
>     Inverse Flattening: 298.250000000000000000
>
>
> To me this looks like the standard UTM, except for the scale factor.
> Is this correct?
>
> Any someone suggest an open source library I can use to convert these
> co ordinates into lats and longs.
>
> Thanks
> Hugh
>
>
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