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<p>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>
</p>
<div class="moz-cite-prefix">Le 28/06/2021 à 22:42, Hill, David
Foster a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:0294865E-F60B-4E1D-A82A-5E99BE7FE191@oregonstate.edu">
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Here is a link to the .tif:
<div class=""><br class="">
</div>
<div class=""><a
href="https://drive.google.com/file/d/1ZxNdoURdLZS1HRUQUhF-evD1NpuIDcvk/view?usp=sharing"
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://drive.google.com/file/d/1pcXklnup5AxYe3DQfGfsZ3mwwe8WI8mf/view?usp=sharing"
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>---------------------------------------------------<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 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="">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8" class="">
<div class="">
<p class=""><span style="color:#D73F09;" 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%7Cf1052ff53fe1478320b708d93a6e67c0%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637605068745495027%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=2U4m8gjslAiHa%2FjfQlCHsjR30mQyoUKaZK6lZTA1W9M%3D&reserved=0" originalsrc="http://www.engr.oregonstate.edu/~dfh" shash="FUsdlehR0kU+BCTpOWvbtvjYyqc+WCZezz9wM9ud0FoCw2qAXAHhD30CgkTPjRquvnDKHTDL6X++cFqCBcnhsKWA2a+cxl8SAGXVOJBN07r6JJWQ1f8WGkWW5QiQauBorhYqLKm3QJAtgtTpZ3Pwut75fX1zjTiG/AN6ps9vS3c=" moz-do-not-send="true">http://www.engr.oregonstate.edu/~dfh</a>
---------------------------------------------------
</pre>
<br class="">
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My software is free, but my time generally not.</pre>
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</blockquote>
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<br class="">
</div>
</blockquote>
<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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