subset data cube from list of specific lat and lon values

[gkinglisboa]

I am a newbie. My experience is matlab.
In matlab the following is easy to do, but I cannot see how to do it with Iris (or any other netcdf tool).

I have a data cube of sea surface temperatures sst(lat, lon, time) in a region of the coastal ocean,
and a list of specific lat, lon values (along a curvy line close to the coast).
I want to extract the SST at these lats and lons from the data cube for each time value.

How do I extract this subset of data using Iris??

Hope you can help.

[trexfeathers]

Hi @gkinglisboa, have you looked at the trajectory module? Are the points you describe exact matches, or are you looking for the nearest points to your points? Thanks!

[gkinglisboa]

Thanks Martin, trajectory module looks interesting. Will investigate. greg

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On Wed, 20 Jul 2022 at 10:33, Martin Yeo ***@***.***> wrote: Hi @gkinglisboa <https://github.com/gkinglisboa>, have you looked at the trajectory <https://scitools-iris.readthedocs.io/en/latest/generated/api/iris/analysis/trajectory.html> module? Are the points you describe exact matches, or are you looking for the nearest points to your points? Thanks! — Reply to this email directly, view it on GitHub <#4869 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACG2XHUAA67TTSFA4YCUCP3VU7BW7ANCNFSM532U2BJQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[gkinglisboa]

I cannot find any examples of using the trajectory module, waypoints, etc. Do you know where I can find some?

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On Thu, 21 Jul 2022 at 06:57, Greg King ***@***.***> wrote: Thanks Martin, trajectory module looks interesting. Will investigate. greg On Wed, 20 Jul 2022 at 10:33, Martin Yeo ***@***.***> wrote: > Hi @gkinglisboa <https://github.com/gkinglisboa>, have you looked at the > trajectory > <https://scitools-iris.readthedocs.io/en/latest/generated/api/iris/analysis/trajectory.html> > module? Are the points you describe exact matches, or are you looking for > the nearest points to your points? Thanks! > > — > Reply to this email directly, view it on GitHub > <#4869 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/ACG2XHUAA67TTSFA4YCUCP3VU7BW7ANCNFSM532U2BJQ> > . > You are receiving this because you were mentioned.Message ID: > ***@***.***> >

[trexfeathers]

The only examples I am aware of are the small ones in the webpage I linked originally. I would hope these were enough to help 'have a go' at your use case, if only to see what output you get. Is there something you need specifically?

[gkinglisboa]

Hi Martin, I eventually found an example that was close to my case. I will have to work through it and expand on the comments on the example to see how it works, but it does look promising.

https://ocefpaf.github.io/python4oceanographers/blog/2015/04/06/bathymetry/

[pp-mo]

Archived, since answered