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Leon,
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<p class="MsoNormal"><span lang="EN-US">First question:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it possible to add a
2D Helmert transformation to the proj.db database. I tried
adding it to the helmert_transformation_table, but proj.db
didn’t let me choose a projected crs as source
transformation.</span></p>
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Yes as designed currently it is limited to source and target CRS
being geographic CRS<br>
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cite="mid:AM0PR09MB35887028FD83856488F5153AB5D59@AM0PR09MB3588.eurprd09.prod.outlook.com">
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<p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I want to add a helmert
transformation which uses ETRS89/GK25 as source crs and
transforms it into the finnish VVJ crs.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My second question is: <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I tried adding the
helmert transformation as a proj string to the
other_transformation table, but proj won’t use it. I also
added an entry into the usage table for the transformation.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When I add a normal
helmert transformation or a grid transformation, proj has no
problem using them after they are added, but not when I add
a transformation in other_transformation.</span></p>
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<p>Show your SQL INSERT statements</p>
Even
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
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