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Hello Christian<br>
<br>
I suggest that you try to fix the prime meridian value in the WKT
that you provided. The current value is:<br>
<blockquote>
<pre>PRIMEM["Paris", 2.33722917]
</pre>
</blockquote>
It should be:<br>
<blockquote>
<pre>PRIMEM["Paris", 2.5969213]</pre>
</blockquote>
<br>
The former is in degrees, while the later is in gradians. The WKT
specification defined in document OGC 01-009 explicitly said that
the <tt>PRIMEM</tt> unit of measurement shall be the one of the
enclosing <tt>GEOGCS</tt> element, which is <tt>UNIT["grad",
0.01570796326794897]</tt> in this case (a copy-and-paste of this
specification can be seen at [1]). However many implementations
ignore this specification and unconditionally fix the unit of
measurement to degrees, maybe because this point was unclear in an
older specification (WKT in OGC 01-009 was itself derived from WKT
in Simple Features if my memory serve me right, and I think that the
later was unclear about units. I guess that Proj.4 WKT is derived
from the later). For example ESRI too seems to interpret the units
that way.<br>
<br>
Regards,<br>
<br>
Martin<br>
<br>
[1]
<a class="moz-txt-link-freetext" href="http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/doc-files/WKT.html#PRIMEM">http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/doc-files/WKT.html#PRIMEM</a><br>
<br>
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