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On 2013-04-26 11:20, Chris Browet wrote :<br>
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cite="mid:CAD5buGLyHQ-CgMO+tPE-Ee6AjwqB5S=YgpV+ezR9eZ78Zaoajg@mail.gmail.com"
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<div>The Lambert72 PROJ4 string extracted from the prj is:<br>
<br>
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<div>+proj=lcc +lat_1=49.8333339 +lat_2=51.16666723333333
+lat_0=90 +lon_0=4.367486666666666 +x_0=150000.01256
+y_0=5400088.4378 +ellps=intl +units=m +no_defs <br>
<br>
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<div>And doesn't quite work.<br>
<br>
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<div>This one is ok:<br>
<br>
+proj=lcc +lat_1=51.16666723333334 +lat_2=49.83333389999999
+lat_0=90 +lon_0=4.367486666666666 +x_0=150000.013
+y_0=5400088.438 +ellps=intl
+towgs84=-99.1,53.3,-112.5,0.419,-0.83,1.885,-1.0 +units=m
+no_defs<br>
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</blockquote>
There are 4 or 5 proj4 definitions of Lambert 72 around and bugs
reports.<br>
This is the correct one, I think, that I configured Merkaartor with
after much searching.<br>
<br>
Obviously, IGN/NGI should specify their projections' proj4
definitions on their site.<br>
Someone should notify them.<br>
<br>
Cheers<br>
<br>
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<td valign="top">André.</td>
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