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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Hello James.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Just a partial answer, I am afraid:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I don’t think you can add an affine post-processing
to a Proj.4 CRS definition. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>For your example, the interpretation of the MapInfo
CoordSys clause should be <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>“CoordSys Earth Projection”, // Just a
name (probably the wrong one in this case)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>8,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
The projection type, in this case Transverse Mercator<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>33,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
The geodetic datum, in this case GRS80 (treat it like WGS84)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>7,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
length unit, in this case meter<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>117,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
central longitude<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>0,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
central latitude<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>0.9996,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
scale factor<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>500000,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
false easting<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>10000000,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
false northing<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>7,</span></font><span lang=EN-US> </span><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'> //
length unit for affine transformation, also meters,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>0.890953, -0.455062, 2903977.24, 0.455063, 0.890954, -6919253.68,</span></font><span
lang=EN-US> </span><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> // affine
parameters A, B, C, D, E, F<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>-100000, -100000, 100000, 100000 //
bounds <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I think the basic CRS in this example can be
expressed in Proj.4 as <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>+init=epsg:28350<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>which gives GDA94 / MGA zone 50, but I think you must
implement the affine transformation yourself. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I got the information from <a
href="http://www.sgsi.com/dnld/MapInfoPro_UserGuide_Current.pdf">http://www.sgsi.com/dnld/MapInfoPro_UserGuide_Current.pdf</a>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>but I didn’t understand the meaning of the
affine parameters. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>And I think the 8 ought to have been 3008, maybe…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Best regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Mikael Rittri<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Carmenta<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Sweden<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>http://www.carmenta.com<o:p></o:p></span></font></p>
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