Hello, Engr. Haroon. I is interesting video. Is there a method to automate the data extraction for multiple netcdf4 files to make time series data for many locations at once .
Thank you very much for the tutorial,my question is it possible to extract ISCCP (cloud cover data) using the same procedure? if not suggest me how to do it.
I am pretty sure you can download ERA5 data in excel as well, but for NC files you can try my other videos Data extraction using MATLAB and R-Studio, or may be if you can share me your steps and the results, then I will be able to help you...
@@rokayahassan2051 I also need to extract the time series data of ERA5 for some particular locations. I tried it with arcGIS but I am not sure whether I extracted it correctly. Total mean monthly precipitation observations are very small in magnitude. If you could please provide the link here that helped you in extracting the same?
@@bilalbhat239 I followed the same steps as in this video. Actually I extracted temperature. It was correct values. Try to open the nc file by panoply to get these factors scale factors and offset . This is because values of some data values are stored as short integer to save storage space. In order to get actual values, you have to apply the following equation get to the real value: value = scale_factor * ( stored_value - add_offset ) Please let me know if it works with you I planned to use precipitation data soon.
Hi Haroon, thank you for sharing, it's very helpful. I wanna ask you, how do we know the units of the extracted data? Because in my case, I extracted historical precipitation dataset from EC-Earth3 (GCM), the results are arround 0.000006, 0.000015, etc. I think that's a bit illogical. Looking forward to hearing from you. Thank you.
The unit of downloaded data is kgm-2s-1. We need to convert it to mm per day ( so multiply by 86400*1000 and divide by 1000 to get rid of density) . Just multiply by 86400
Assalamulikm brother. can i get prcip data in raster formate for specific year in in the future under different scnerios of ssp126, 445 and 585.. if yes please share videos
@@EngrHaroonHaider Thank you very much for your concern,I downloaded ISCCP data from its site in nc format and imported it in Arcgis following steps (Multidimensional tools-NetCDF to Raster layer, Feature...) ,I tried all options. Under some options there it never allows to insert variables like (log, lat),in others it stops execution. The variables I want extract are cloud cover fraction,total cloud cover ....for my aoi.
Thank you Sir. Greetings from Peru.
Thank you for the video. Very helpful.
Welcome 🌹🌹🌹
Thank you Sir. Super helpful.
precipitation unit in this video is mm or kg m-2 s-1. do we need to convert to mm?
Hello, Engr. Haroon. I is interesting video. Is there a method to automate the data extraction for multiple netcdf4 files to make time series data for many locations at once .
hi, you can check other videos, extraction using R studio or Using MatLab...
@@EngrHaroonHaider can you give the link
I tried to extract the chirps precipitation data, but the result in the Precip column is null. Are you willing to give advice?
The extension of Chirps data is nc4 file, please change the extension in the codes
Thank you very much for the tutorial,my question is it possible to extract ISCCP (cloud cover data) using the same procedure? if not suggest me how to do it.
Yes, you can
Thank you for the video. I wanted to know where you downloaded the aphro data.Please help
I tried to extract a time series of ERA5 data at specified location, it works but the time column repeated and not corrected
I am pretty sure you can download ERA5 data in excel as well, but for NC files you can try my other videos Data extraction using MATLAB and R-Studio, or may be if you can share me your steps and the results, then I will be able to help you...
@@EngrHaroonHaider Thanks for reply. I used arcgis 10.3 and It didn't properly . I used Arcpro it works
@@rokayahassan2051 that's great 🌹
@@rokayahassan2051 I also need to extract the time series data of ERA5 for some particular locations. I tried it with arcGIS but I am not sure whether I extracted it correctly. Total mean monthly precipitation observations are very small in magnitude. If you could please provide the link here that helped you in extracting the same?
@@bilalbhat239 I followed the same steps as in this video. Actually I extracted temperature. It was correct values.
Try to open the nc file by panoply to get these factors scale factors and offset . This is because values of some data values are stored as short integer to save storage space. In order to get actual values, you have to apply the following equation get to the real value:
value = scale_factor * ( stored_value - add_offset )
Please let me know if it works with you I planned to use precipitation data soon.
Hi Haroon, thank you for sharing, it's very helpful. I wanna ask you, how do we know the units of the extracted data? Because in my case, I extracted historical precipitation dataset from EC-Earth3 (GCM), the results are arround 0.000006, 0.000015, etc. I think that's a bit illogical. Looking forward to hearing from you. Thank you.
It is per second data. multiply it with 86400 to get daily data
and what about tempreture
@@rizwan3147
The unit of downloaded data is kgm-2s-1. We need to convert it to mm per day ( so multiply by 86400*1000 and divide by 1000 to get rid of density) . Just multiply by 86400
Assalamulikm brother.
can i get prcip data in raster formate for specific year in in the future under different scnerios of ssp126, 445 and 585.. if yes please share videos
Hi. if I want to extract time series for every pixel what do i do?
Why are the dimension values, lattitude and longitude columns filled with the numbers 34 and 73?
Thank u Sir
I tried doing this for GPM data, My results are null. Can you help me?
What is unit of precipitation? Seems all values below zero
depends upon your netcdf files and the data you are incorporating.
what is the in put file more detail please ?
input files are nc files and the csv file.
If you have tutorial on how I could retrieve ,please! It failed so many times when I try.
what is the error? can you please elaborate a bit?
@@EngrHaroonHaider Thank you very much for your concern,I downloaded ISCCP data from its site in nc format and imported it in Arcgis following steps (Multidimensional tools-NetCDF to Raster layer, Feature...) ,I tried all options. Under some options there it never allows to insert variables like (log, lat),in others it stops execution. The variables I want extract are cloud cover fraction,total cloud cover ....for my aoi.
Maybe there is an error in your NetCDF file...