Extracting a location from a NetCDF file - Do you get the point?

You have a weather station or a field experiment and you want to extract a time series of weather or climate data from a gridded data set in netCDF or grib format, maybe a satellite data set or reanalysis or climate model output. What do you do? Well don't panic, this video demonstrates how you can extract the nearest gridbox to your location or use bilinear or bicubic interpolation using climate data operators (CDO).

Happy viewing and please leave any requests for future videos in the comments below.

[LilianeUWAJENEZA]

Thank you so much for all video you did it's very helpful. This two method used to extra the time series dataset at specific location they make some interpolation for the data, I would like to ask if there is another methods we can use to select the time series data at specific station from netcdf without interpolation?

[kibrugedam]

I love your videos Sir, really helpful! I faced netcdf data whose time coordinate is showing 0000-00-00 00:00:00 when I employed cdo seinfo ifile ofile. I wanna it to have the same time coordinate to another netcdf file having the same variable . I am grateful if you help. Thanks.

[PedroNGV]

Dear Adrian Tompkins,

Thank you very much for these set of videos, they are the most accessible and valuable material about reanalysis data I've found!

I will leave some questions about my doubts on videos comments. Thank you very much!

About this video, I would like to ask about convert the output of the location info, for a CSV file.

Also another doubt I have is, if we have more than one variable in the same NetCFD/GRIB file. Here you have the 2m temperature variable, but imagine we have also 2m dewpoint temperature, 2m temperature, 10m u-component of wind, 10m v-component of wind, total precipitation, etc. How to convert them to a CSV file (one column for each variable).

Lastly, I don't know if it is possible, but how to convert the Units, for instance, from Kelvin to degrees celsius.

Thank you very much!

[hajarelhlaissi]

Thank you, thank you, sir. Your clips are very useful. I want you to ask a question. I hope you will answer me as soon as possible. Is it possible to extract the country of Morocco from this map? and how?

[MultiRose]

Thanks for the nice video, how to save the time series as a excel or csv file please

[vinayk]

Thank you for the walk through but I am confused as to how only a point is enough to extract a section out, shouldn't we be specifying 2 points instead that can meaningfully define a rectangle of which we want to extract the data?

[ramarajpalanisamy]

Love all your videos. Once ready - Share the openEDX course details. One doubt - how to store this single 'point' data ina .txt or .csv?

[Alejvm]

Hello mr. Tompkins,
What is the order of the videos? I think the playlist is a little disordinate (vg the video #3 "Extracting subregions..." uses nc dump, that is explained in video #5 "Using ncdump...")
Love this channel and already passed the word :D

[shunrei]

Sir, but If I have a continent grid shapefile with defined cell number and their location (e.g., cell number 560990 lat 43, lon= 37) and I want to extract my NetCDF climate variable for each grid. What should I do? Thank you in advance.

[gkinglisboa]

HI, I want to do this for a list of lat, lon locations - namely sst parallel to the Portuguese coast. That is, along a curve. Is there a simple way to do that?

[turning_point]

Hi Adrian,
I've extracted data using the same command you're talking from a .nc file using cdo. Again, I extracted the data for the same location from the same .nc file using ArcGIS.
Then I compare the both outputs and they are different by far margin. It is observed that values extracted by cdo is much more higher than the values extracted by ArcGIS? Can you please tell me why I'm getting such differences?

[popuriann]

Thank you for the tutorial, this is so helpful!. One question, which one is more recommended to use? NN or Bilinear? is there any pros and cons for each method?

[lemikoo]

Would you please help me with how to install CDO since I am suffering from the error of the package (Proj, nethdf, etc ) I have tried reinstall them but the same, I am using Window10, Toshiba

[silverreserve]

Thanks for useful video you have shown how to extract a location for one pair of lat and longitude. how we can do this for a series of Latitude and longitude please

[andreaskellerhals]

I have found these tutorials only now, unfortunately. They are very instructive but at one point I cannot follow anymore as the function cdo seems not to exist anymore. Will you update that?

[nembilwiwamashudu]

I want to extract temperature values from netcdf file for Southern Africa (1979-2017) ..to draw Taylor diagram (Era-5 and Model) do I chose a single point(lat/lan in Southern africa) or do i chose the whole area( lon-lon / lat lat) and average then extract?

[rohitgautam]

What does method (nn and bil) mean here