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<p><font face="monospace">Hi!</font></p>
<p><font face="monospace">Our client is willing to generate his data in EPSG:31467 but he wants to translate +40cm on the y axis. <br> </font></p>
<p><font face="monospace">So I figured out that I would use the corresponding PROJ.4 "</font><font face="monospace"><font face="monospace"><code>+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel +units=m +no_defs +type=crs" </code></font>code and modify the y_0=0 with a y_0=0.4<br> </font></p>
<p><font face="monospace">1. Data are originally expressed in EPSG:4326</font></p>
<p><font face="monospace">2. Using the EPSG code: via proj API, I transform the data via proj_create_crs_to_crs(..., "EPSG:4326", "EPSG:31497")</font></p>
<p><font face="monospace">3. Now, if I replace the "EPSG:31467" with "<code>+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel +units=m +no_defs +type=crs", (the corresponding proj line), the data are z-offsetted by approx 1000m<br> </code></font></p>
<p><code>I know that for some CRS, the PROJ.4 is not enough to generate the correct coordinates. Is that the case for this transformation? <br> </code></p>
<p><code>Ultimately, is there a something (+proj=pipeline ?) that I could use that would transform my data from EPSG:4326 to EPSG:31497 with a translation of +40cm on the y axis?</code></p>
<p><code>Thank you all!</code></p>
<p><code>Kilian<br> </code></p>
<p><font face="monospace"><br> </font></p>
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