<div dir="ltr">Hi Andre,<div><br></div><div>thanks so much for the quick answer, this is perfect for scripting.</div><div><br></div><div>However, I'm still wondering... is GDAL using the local PROJ4 installation? Or does datum shiftings by itself? If so, why not to rely on PROJ4?</div>
<div><br></div><div style>And using the grid is something we always want to do. Is there any place in the GDAL config files where we can make the use of the grid permanent for a datum shift case in particular?</div><div style>
<br></div><div style>Thanks a lot,</div><div style><br></div></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><div style="font-family:Helvetica,arial,sans-serif;font-size:18px;padding:20px 5px 10px 0px">
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<br><br><div class="gmail_quote">On Fri, May 10, 2013 at 7:32 PM, Andre Joost <span dir="ltr"><<a href="mailto:andre+joost@nurfuerspam.de" target="_blank">andre+joost@nurfuerspam.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Am 10.05.2013 18:07, schrieb Juan Pedro Pérez Alcántara:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
How can I make GDAL to use a NTv2 grid to shift between some datums?<br>
<br>
</blockquote>
<br>
You have to tell GDAL where to find your shift gridin your file system:<br>
<br>
cs2cs +init=epsg:4326 +to +proj=tmerc +lat_0=0 +lon_0=6 +k=1 +x_0=2500000 +y_0=0 +ellps=bessel +nadgrids=D:\Karten\gdal\<u></u>cs2cs\BETA2007.gsb +units=m in.txt >>out.txt<br>
<br>
HTH,<br>
Andre Joost<br>
<br>
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</blockquote></div><br></div>