<div dir="auto">Here is a helpful reference: <a href="https://proj.org/resource_files.html#transformation-grids">https://proj.org/resource_files.html#transformation-grids</a></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 8, 2023, 3:43 PM Scott Arnold <<a href="mailto:scottcarnold2@gmail.com">scottcarnold2@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"> Greetings GDAL Community,
<br>
<br>I've been working with GDAL lately, and I have a question for more
experienced GDAL users or developers. GDAL has a dependency on PROJ. I
know some GDAL functions, for example, will respond with an error
message if the proj.db cannot be found, and there is a dependency on
PROJ during the GDAL build. PROJ has a rather large collection of data
packaged separately from the PROJ source code (described in PROJ-data
readme as containing shift grids for horizontal and vertical coordinate
transformations.). You can build both PROJ and GDAL without PROJ data,
and the GDAL functions I've used (albeit I've only used a few) seem
unaffected by not having PROJ data. Can any of you provide any insights
into what the implications are of having PROJ data installed vs. not
installed?
<br>
<br>Thank you,
<br>
<br>Scott Arnold <br></div>
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