Please use this section to post queries, ideas, sharing your work etc <eom>

[answerquest]

Please use this section to post queries, ideas, sharing your work etc

[chrismathen]

Hi, why are junk 99 and 900 for temperature and rainfall respectively?
in imdlib package they identify -999 as NA values.

[answerquest]

@chrismathen i had the same questions when I first extracted the data. My guess right now is they were using a system where null value isn't tolerated. And 0 is a datapoint in itself so can't be used. So they chose some plainly out-of-range values as fillers in place of null.

[jadavkartik]

Below error while i'm trying to download datasets for 1951 to 2021, and actually it is showing up to 1960 only.
Exception: Error in file reading, mismatch in size of data-length

[answerquest]

@jadavkartik the IMD website has recently undergone some changes which makes the previous download actions not work. The author of the lib imdlib, which this repo relies upon in the data import program, has posted that he is working on needed changes. There should be an update soon. You can follow it here: iamsaswata/imdlib#17 .

If you want to give this a try: You should be able to use manually downloaded files from https://imdpune.gov.in/lrfindex.php gridded archive data section. Pls place them in 'rain' / 'tmax' / 'tmin' folder next to the program, rename them to "2000.GRD", "2001.GRD" etc as per year, comment out all the imdlib.get_data( lines to make the import program use your downloaded files directly.

[iamsaswata]

Thank you @answerquest for mentioning imdlib here. As rightly said, the IMD website has recently undergone some changes and so the data endpoints and the associated binary data. Data download and and error related "mismatch in size of data-length"
are results of that.

But these two errors have been fixed with the new imdlib update. If one is using the older imdlib version, they should first uninstall that and install the latest imdlib. Please check the newer version is >= 0.1.14. Now, one should be able to download and/or read the data as earlier.

[Climatology]

Hello @answerquest, have you tried working on IMD tmax and tmin data. For specific lat-long like (26.19,90.58) and (26.28,90.34) the rainfall data is fine, but tmax and tmin values are same for these two different coordinates.