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Hello and Thank you for this answer.<br>
<br>
Yes you are right it seems quite similar.<br>
<br>
Well ... it would be very nice if this kind of problem could be solved
for a Gnu/Linux <br>
distribution such as the current Debian stable which is a very nice
(and very stable) distribution.. <br>
for the moment i will use Qgis 1.7.4 in a virtual Windows machine, but
it is not really the best solution (it is slower and indirect) <br>
<br>
Best regards <br>
<br>
<br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
here is a summary of my tests, indicated in the "Annex of the previous
email) :<br>
<br>
the shift of 50 m between layers in two different projections lcc
occurs in this situation :<br>
Qgis 1.7.4 for Debian squeeze compiled from the version "exported" of
the code<br>
and using :<br>
GDAL/OGR version 1.6.3<br>
Version de QWT : 5.2.0.<br>
compiled with Qt 4.6.3 and run with
Qt 4.6.3 <br>
<br>
(It does not occur with a version for Ubuntu Lucid Lynx with Qt 4.6.2
and GDAL/OGR 1.8.0 compiled also from the version "exported" of the
code)<br>
<br>
i noticed that <br>
the
proj4 definition of the projection Lambert II etendu IGNF:LAMBE ID :
10090 indicates the use of a nadgrid ntf_rgf93 like this :<br>
+proj=lcc +nadgrids=ntf_r93.gsb,null
+a=6378249.2000 +rf=293.4660210000000 +pm=2.337229167
+lat_0=46.800000000 +lon_0=0.000000000 +k_0=0.99987742
+lat_1=46.800000000 +x_0=600000.000 +y_0=2200000.000 +units=m
+no_defs <br>
<br>
However in Debian Squeeze version of
Qgis 1.7.4 when i "right click" on a layer in "Lambert
II etendu" to obtain the properties and the medatata about the
SCR the +nadgrids=ntf_r93.gsb,null simply disappears in the medata ,
and i just obtain this :<br>
<br>
+proj=lcc +lat_1=46.8 +lat_0=46.8
+lon_0=0 +k_0=0.99987742 +x_0=600000 +y_0=2200000 +a=6378249.2
+b=6356514.999978254 +pm=2.337229167 +units=m +no_defs <br>
<br>
<br>
Le 29/03/2012 09:17, Giovanni Manghi a écrit :
<blockquote
cite="mid:20120329071707.B9BB25F9961@fx101.security-mail.net"
type="cite">
<pre wrap="">Hi, I do not have the time now tor read carefully allt he mail, but ti
seems to me something similar to this
<a class="moz-txt-link-freetext" href="http://hub.qgis.org/issues/5142">http://hub.qgis.org/issues/5142</a>
that happens only in Lunux and qgis-master.
cheers
-- Giovanni --
</pre>
</blockquote>
<br>
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