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Making use of the EPSG codes in the proj4-file epgs found in the
FWTools distribution of GDAL (proj_lib/epsg).<br>
<br>
Stepping through them reveals some of them fails when trying to setup a
spatialreference and a transform to WGS84. When instead using the Proj4
string some works but most of them still fail.<br>
(short code-snippet:<br>
spatialReference = new SpatialReference("");<br>
spatialReference.ImportFromEPSG(data.EPSG);<br>
SpatialReference wgs84 = new SpatialReference("");<br>
wgs84.SetWellKnownGeogCS("WGS84");<br>
gpsToReference = new CoordinateTransformation(wgs84, refererence);<br>
referenceToGps = new CoordinateTransformation(refererence, wgs84);<br>
<br>
This in version 1.5/1.5.1 of GDAL. (own compilation)<br>
Do a try with GDAL 1.6dev instead (from FWTools) and all works with
the EPSG code (or Proj4)<br>
Do I miss something in my own compilation? Or an error in GDAL C#? <br>
<br>
OSB1936 works when setting up via Proj4 but not EPSG.<br>
<br>
The ones who fail on both EPSG-codes and Proj4 are.<br>
<table x:str="" style="border-collapse: collapse;" border="0"
cellpadding="0" cellspacing="0" height="984" width="526">
<tbody>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt; width: 48pt;" height="17" width="64">Amersfoort
/ RD New</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Amersfoort / RD Old</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">ATS77 / New
Brunswick
Stereographic (ATS77)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">ATS77 / Prince
Edward
Isl. Stereographic (ATS77)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Dealul Piscului
1933/
Stereo 33</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Dealul Piscului
1970/
Stereo 70</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Deir ez Zor / Levant
Stereographic</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NAD83(CSRS) / New
Brunswick Stereo</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NAD83(CSRS) / Prince
Edward Isl. Stereographic (NAD83)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NAD83(CSRS98) / New
Brunswick Stereo (deprecated)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NAD83(CSRS98) /
Prince
Edward Isl. Stereographic (NAD83) (deprecated)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NAD83(CSRS98) /
Prince
Edward Isl. Stereographic (NAD83) (deprecated)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Amuri
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Bay of
Plenty
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Bluff
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Buller
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Collingwood
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Gawler
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Grey Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Hawkes Bay
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Hokitika
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Jacksons
Bay
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Karamea
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Lindis Peak
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Marlborough
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Mount Eden
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Mount
Nicholas
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Mount
Pleasant
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Mount York
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Nelson
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / New Zealand
Map
Grid</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / North
Island
Grid</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / North
Taieri
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Observation
Point Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Okarito
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Poverty Bay
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / South
Island
Grid</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Taranaki
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Timaru
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Tuhirangi
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / UTM zone 58S</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / UTM zone 59S</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / UTM zone 60S</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Wairarapa
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Wanganui
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">NZGD49 / Wellington
Circuit</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
GUGiK-80</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
Poland zone I</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
Poland zone I (deprecated)</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
Poland zone II</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
Poland zone III</td>
</tr>
<tr style="height: 12.75pt;" height="17">
<td style="height: 12.75pt;" height="17">Pulkovo 1942(58) /
Poland zone IV</td>
</tr>
</tbody>
</table>
<br>
And YES, I know - many of the EPSG-initiated, and Proj4, references
lack correct toWGS coefficients so the transforms my not be accurate
but that is a problem to be handled later (or is there as source with
correct toWGS coefficients that I may use?)<br>
<br>
Yours<br>
Tomas<br>
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