Hi Sam, <div><br></div><div>You might take a look at the gc_inout function. Not sure how you are defining your regions - shapefiles? Simple bounding boxes?</div><div><br></div><div>Rick<br><br>On Tuesday, December 25, 2018, Sam McClatchie <<a href="mailto:smcclatchie@fishocean.info">smcclatchie@fishocean.info</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Colleagues<br>
<br>
I have some voluminous station data in ascii files that I have
written into a netcdf file with minimal pre-definition of dimensions
and attributes (please see the link below for the data and code). My
problem is that I want to subset the global fishing_hours variable
conveniently by region. <br>
<br>
The obvious solution would be to dimension the fishing_hours
variable properly into a 3-dimensional variable (time, lat, lon) and
use named coordinate subscripting. I realised when I went back to
rewrite the data with variable pre-definition that I have a problem,
because these data are not on any kind of grid, so the sizes of the
coordinate arrays are the same size as the vector lengths for lat/
lon.<br>
<br>
My goal is to plot fishing_hours on maps where each point is
colour-coded by the magnitude of the fishing_hours variable (as for
example, here: <see
<a href="https://www.ncl.ucar.edu/Applications/Scripts/station_2.ncl" target="_blank">https://www.ncl.ucar.edu/<wbr>Applications/Scripts/station_<wbr>2.ncl</a>>).
Note that the data were not subset, I simply set the map regions.
Also, the plot only shows lat/lon variables, not the fishing_hours
variable because it has no coordinate variables.<br>
<br>
The data, NCL code, and figure referred to in this message can be
downloaded from here:
<a href="https://my.pcloud.com/publink/show?code=kZsanC7ZlKPCnfV5wnLFWm4C2yCww4mtUIYV" target="_blank"><https://my.pcloud.com/<wbr>publink/show?code=<wbr>kZsanC7ZlKPCnfV5wnLFWm4C2yCww4<wbr>mtUIYV></a><br>
I suggest downloading the directory as an archive and unpacking it
locally to a scratch directory.<br>
<br>
Any help on how to conveniently subset the global fishing_hours data
by lat/ lon would be appreciated.<br>
<br>
Best fishes<br>
Sam<br>
<div>-- <br>
Sam McClatchie (fisheries oceanographer)<br>
& Elena Turin (accounting & auditing)<br>
FishOcean Enterprises<br>
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<span style="text-decoration:underline"><a href="http://www.fishocean.info" target="_blank">Internet</a></span><br>
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<br>
"The time has come", the tui said,<br>
"to talk of many things:<br>
Of songs - and ferns - and flowering flax,<br>
of Pukekos and dreams ..."<br>
<br>
(not Lewis Carroll)
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