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<p>Apologies, I misread your original question. I don't observe a
difference in min x between the .nc file you observe and the .tif
I get from gdal_translate. However I see the .tif you uploaded has
indeed a difference in x, but it also has a UTM CRS, whereas the
original .nc file has no CRS information, so I'm a bit confused if
you attached the right .nc file.<br>
</p>
<div class="moz-cite-prefix">Le 29/06/2021 à 00:07, Hill, David
Foster a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:C76054DC-9B66-4825-9A56-7EDC8023547C@oregonstate.edu">Thank
you for the reply. I still don’t understand why the minimum x
values from the grids are so different between the .nc and the
.tif files. I will continue to try and figure it out.
<div class=""><br class="">
</div>
<div class="">Regards,</div>
<div class=""><br class="">
<div class="">
<div>---------------------------------------------------<br
class="">
David F. Hill<br class="">
Professor<br class="">
Civil and Construction Engineering<br class="">
Oregon State University<br class="">
220 Owen Hall<br class="">
Corvallis, OR 97331<br class="">
541.737.4939<br class="">
<a href="mailto:david.hill@oregonstate.edu" class=""
moz-do-not-send="true">david.hill@oregonstate.edu</a><br
class="">
<a class="moz-txt-link-freetext" href="http://www.engr.oregonstate.edu/~dfh">http://www.engr.oregonstate.edu/~dfh</a><br class="">
---------------------------------------------------</div>
<div class=""><br class="">
</div>
<br class="Apple-interchange-newline">
</div>
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Jun 28, 2021, at 2:56 PM, Even Rouault <<a
href="mailto:even.rouault@spatialys.com" class=""
moz-do-not-send="true">even.rouault@spatialys.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">
<p class=""><span class="">[This email originated from
outside of OSU. Use caution with links and
attachments.]</span></p>
<div class="">
<p class="">As far as I can see, the netCDF driver
behaves as designed. It reports as the origin the
top-left corner of the raster.<br class="">
</p>
<div class="moz-cite-prefix">Le 28/06/2021 à 22:42,
Hill, David Foster a écrit :<br class="">
</div>
<blockquote type="cite"
cite="mid:0294865E-F60B-4E1D-A82A-5E99BE7FE191@oregonstate.edu"
class="">
Here is a link to the .tif:
<div class=""><br class="">
</div>
<div class=""><a
href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1ZxNdoURdLZS1HRUQUhF-evD1NpuIDcvk%2Fview%3Fusp%3Dsharing&data=04%7C01%7C%7C2968bf9723694d852d0708d93a7f9c9e%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637605142036202941%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=TEV9ZAhk1Si3JbX9YJeqCI0unDgOjrxRYxoOIQqnrdk%3D&reserved=0"
class="" moz-do-not-send="true">https://drive.google.com/file/d/1ZxNdoURdLZS1HRUQUhF-evD1NpuIDcvk/view?usp=sharing</a></div>
<div class=""><br class="">
</div>
<div class="">And here is a link to the .nc:</div>
<div class=""><br class="">
</div>
<div class=""><a
href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1pcXklnup5AxYe3DQfGfsZ3mwwe8WI8mf%2Fview%3Fusp%3Dsharing&data=04%7C01%7C%7C2968bf9723694d852d0708d93a7f9c9e%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637605142036212935%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dx1yLb2i6YCPjnXudnE1JyPHKG1Wywt3IFv%2Foa7Q%2BQc%3D&reserved=0"
class="" moz-do-not-send="true">https://drive.google.com/file/d/1pcXklnup5AxYe3DQfGfsZ3mwwe8WI8mf/view?usp=sharing</a> </div>
<div class=""><br class="">
</div>
<div class=""><br class="">
<div class="">
<div class="">---------------------------------------------------<br
class="">
David F. Hill<br class="">
Professor<br class="">
Civil and Construction Engineering<br class="">
Oregon State University<br class="">
220 Owen Hall<br class="">
Corvallis, OR 97331<br class="">
541.737.4939<br class="">
<a href="mailto:david.hill@oregonstate.edu"
class="" moz-do-not-send="true">david.hill@oregonstate.edu</a><br
class="">
<a class="moz-txt-link-freetext"
href="https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.engr.oregonstate.edu%2F~dfh&data=04%7C01%7C%7C2968bf9723694d852d0708d93a7f9c9e%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637605142036212935%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=FDM4z8QJWywKAJRXM1aQGXma5kycby1G%2FRdlWk1rALo%3D&reserved=0"
moz-do-not-send="true">http://www.engr.oregonstate.edu/~dfh</a><br
class="">
---------------------------------------------------</div>
<div class=""><br class="">
</div>
<br class="Apple-interchange-newline">
</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Jun 28, 2021, at 12:53 PM,
Even Rouault <<a
href="mailto:even.rouault@spatialys.com"
class="" moz-do-not-send="true">even.rouault@spatialys.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="">
<p class=""><span class="">[This email
originated from outside of OSU. Use
caution with links and attachments.]</span></p>
<div class="">
<p class="">David,</p>
<p class="">providing a link to a such
file could be useful for investigation</p>
<p class="">Even<br class="">
</p>
<div class="moz-cite-prefix">Le
28/06/2021 à 20:59, Hill, David Foster
a écrit :<br class="">
</div>
<blockquote type="cite"
cite="mid:64E16133-8CCD-4977-B0CE-48D8F0952547@oregonstate.edu"
class="">
<pre class="moz-quote-pre" wrap="">Hello.
I am new to GDAL, and have spent the past two weeks exploring its use for (largely) nc —> tiff conversions. I am puzzled by a few things, however. I have a .nc file and when I use
</pre>
<blockquote type="cite" class="">
<blockquote type="cite" class="">
<pre class="moz-quote-pre" wrap="">ncdump -c file.nc
</pre>
</blockquote>
</blockquote>
<pre class="moz-quote-pre" wrap="">the coords are shown to me. The min x is 487200 and the min y is 4690100. The grid size is 100 m. If I then do:
</pre>
<blockquote type="cite" class="">
<blockquote type="cite" class="">
<pre class="moz-quote-pre" wrap="">gdal_translate -of GTiff file.nc file.tif
</pre>
</blockquote>
</blockquote>
<pre class="moz-quote-pre" wrap="">and then
</pre>
<blockquote type="cite" class="">
<blockquote type="cite" class="">
<pre class="moz-quote-pre" wrap="">gdalinfo file.tif,
</pre>
</blockquote>
</blockquote>
<pre class="moz-quote-pre" wrap="">it shows the ‘lower left’ corner coordinates as
486790, 4690050
For the y coord, I can see how this makes sense…assume that ncdump is giving coords of the grid cell centers, not the ‘corner’ of the grid cells. Thus, the 50 m difference. For the x coord, the values are like 410 m different, so I am puzzled about that.
I am sure this is an overly simple question, but I would welcome any tips / guidance on what I am doing wrong. Thank you.
---------------------------------------------------
David F. Hill
Professor
Civil and Construction Engineering
Oregon State University
220 Owen Hall
Corvallis, OR 97331
541.737.4939
<a class="moz-txt-link-abbreviated" href="mailto:david.hill@oregonstate.edu" moz-do-not-send="true">david.hill@oregonstate.edu</a>
<a class="moz-txt-link-freetext" href="https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.engr.oregonstate.edu%2F~dfh&data=04%7C01%7C%7C2968bf9723694d852d0708d93a7f9c9e%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637605142036222929%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=WsoCWjOMMxnhLJ1rpoDDmuVlzoVlrDn6rq%2FJeersJt8%3D&reserved=0" moz-do-not-send="true">http://www.engr.oregonstate.edu/~dfh</a>
---------------------------------------------------
</pre>
<br class="">
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<pre class="moz-signature" cols="72">--
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My software is free, but my time generally not.</pre>
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