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</style></div><div>Hi there,</div><div><br data-mce-bogus="1"></div><div>I try to make a conversion using shiftgrids from IGNF: NTFP to IGNF:ETRS89LCC. By default, it seems that it uses the helmert approximation between the 2 crs and i cannot figure out how to use the grid fr_ign_ntf_r93.</div><div><br data-mce-bogus="1"></div><div>So far i've found how to create a pipeline that works with cct, but i'd like to have a code that represents the crs and be able to go to different destination crs with the cs2cs application. Any idea?</div><div><br data-mce-bogus="1"></div><div><span style="color: #5d6c79; font-family: Menlo; font-size: 15px; font-style: normal; font-variant-ligatures: no-common-ligatures; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;" data-mce-style="color: #5d6c79; font-family: Menlo; font-size: 15px; font-style: normal; font-variant-ligatures: no-common-ligatures; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">(helmert approx + no geoid with the standard codes)</span></div><div><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1">echo 0 56<span class="Apple-converted-space">  </span>0 | ./cs2cs<span class="Apple-converted-space">  </span>+ from IGNF:NTFP<span class="Apple-converted-space">  </span>+to IGNF:ETRS89LCC </span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1">result  : </span><span class="s1">3474788.21<span class="Apple-tab-span"> </span>2655358.23 0.00</span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1"></span><br></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1">(correct pipeline)</span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1">echo 0  56.000000 0  | PROJ_DEBUG=3  ./cct    +proj=pipeline +step +proj=unitconvert +xy_in=grad +xy_out=rad +step +inv +proj=longlat +ellps=clrk80ign +pm=paris  +step +proj=hgridshift +grids=fr_ign_ntf_r93.tif +step +inv  +proj=vgridshift  +grids=RAF09.gtx  +step +proj=lcc +lat_0=52 +lon_0=10 +lat_1=35 +lat_2=65 +x_0=4000000 +y_0=2800000 +ellps=GRS80</span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1"></span><br></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1"><span class="Apple-converted-space">result : </span>3474789.9972 <span class="Apple-converted-space">  </span>2655359.2908 <span class="Apple-converted-space">      </span>43.6421 <span class="Apple-converted-space">          </span>inf</span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1"></span><br></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><span class="s1">reference from THE official IGN/SGN dataset:</span></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;">3474789.997<span class="Apple-tab-span"> </span>2655359.291<span class="Apple-tab-span"> </span>43.642</p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><br></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><font color="#000000" face="arial, helvetica, sans-serif"><span style="font-size: 16px;">Thanks a lot for your help,</span></font></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p class="p1" style="margin: 0px;" data-mce-style="margin: 0px;"><font color="#000000" face="arial, helvetica, sans-serif"><span style="font-size: 16px;">Nicolas Bellaiche</span></font></p><div style="clear: both;" data-mce-style="clear: both;"><br></div></div></div></body></html>