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<div>Hi Even,</div>
<div>I see, Ok I think that all makes sense. Thanks very much!</div>
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<div>Cheers</div>
<div>Chris</div>
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<div dir="ltr"><span style="font-size:12.8px;color:rgb(102,102,102)">Chris Marsh, PhD</span></div>
<div dir="ltr"><span style="font-size:12.8px;color:rgb(102,102,102)"></span><span><span style="font-size:12.8px;color:rgb(102,102,102)"></span></span><span><span style="font-size:12.8px;color:rgb(102,102,102)">University of Saskatchewan</span></span><br style="font-size:12.8px;color:rgb(102,102,102)">
<span style="font-size:12.8px;color:rgb(102,102,102)"></span><a href="http://chrismarsh.ca/" style="font-size:12.8px;color:rgb(102,102,102)" target="_blank">chrismarsh.ca</a></div>
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<div dir="ltr" class="gmail_attr">On Mon, Feb 3, 2020 at 12:45 PM Even Rouault <<a href="mailto:even.rouault@spatialys.com">even.rouault@spatialys.com</a>> wrote:<br>
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On lundi 3 février 2020 17:36:45 CET Marsh, Chris wrote:<br>
> Yup, forgot to enable netcdf. Sorry about that.<br>
><br>
> Otherwise your directions worked perfectly, thank you very much!<br>
><br>
> In terms of understanding, exactly, these steps for the next time:<br>
><br>
> 0) How would I have known the data were transposed lon, lat?<br>
<br>
gdalinfo NETCDF:"SD_20160901.nc":snd_upd<br>
reporting<br>
Warning 1: No UNIDATA NC_GLOBAL:Conventions attribute<br>
and<br>
metadata with the lat and lon variables was a hint<br>
<br>
"ncdump SD_20160901.nc" showing "float snd_upd(lon, lat)" confirmed it<br>
<br>
> 0b) How would I have known the spacing of the lat variable was not constant?<br>
<br>
Computing differences on consecutive lat values in the ncdump output. But<br>
gdalinfo with "--debug on" also reports "Longitude is not equally spaced" (it<br>
is confused here because of the lon/lat inversion, so this must be understood<br>
as the latitude...)<br>
<br>
> 1) What is the motivation to tiling the output?<br>
<br>
So that transposition of the array works fast.<br>
<br>
> 3) I don't understand this step. Why is this referencing back the nc<br>
> file?<br>
<br>
Because previous steps have lost the georeferencing<br>
<br>
Even<br>
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--<br>
Spatialys - Geospatial professional services<br>
<a href="http://www.spatialys.com" rel="noreferrer" target="_blank">http://www.spatialys.com</a><br>
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