imdlib - Version: 0.3.1

Released 08 October 2026.

Fixes

• load() downloads several files at a time (parallel=, default 4), which is much faster.
• Real-time days missing at IMD between available days are NaN, with a warning, instead of an error.
• A download blocked by a web browser, or an empty reply for an older year, is no longer reported as data not published yet.

Full changelog: https://github.com/iamsaswata/imdlib/compare/0.3.0...0.3.1

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata 8 days ago

imdlib - Version: 0.3.0

Released 07 October 2026.

Upgrading from 0.2.0: write data = data.clip(...) (clip() no longer changes data), and in scripts print(data.shape) (shape no longer prints).

Breaking changes

• clip() now returns the clipped data and no longer changes the original object: write data = data.clip(...).
• shape returns the size of the data, e.g. (366, 31, 31), instead of printing it. In a script, write print(data.shape).

New

• Added region(): area-weighted means over named states, districts, river basins and sub-basins of India, or over the polygons of a shapefile, and the value at a city, as a pandas.DataFrame. imdlib.regions.search(), list() and info() find region names and show the sources.
• clip() accepts region names (state=, district=, basin=, subbasin=) as well as a shapefile. Cells partly inside the region are kept with their fraction (cell_fraction). spatial_mean() uses these fractions, so it equals region() for the same region. get_xarray() and to_netcdf() include cell_fraction.
• load() reads the files when the data is first used: it returns at once, and region() and clip() read only the cells they need.

Fixes

• Missing values are recognised by the IMD values (-999 for rain, 99.9 for temperature, none for GPM rain) instead of the value of the corner cell. This applies to spatial_mean(), get_xarray(), the land mask, the climate indices, climatology(), anomaly(), fill_na(), remap(), heatwave() and coldwave(). Results for data that is not clipped are unchanged, except:
  • GPM rain: -999 is no longer left out;
  • real-time and computed data: valid zero values are no longer turned into missing values, e.g. remap() or fill_na() after compute('dr', 'A').
• fill_na():
  • finds the temperature cells it does not fill (the Andaman and Nicobar area and the row at 7.5°N) by their coordinates, so it is correct on the 0.5° real-time grid, where results change;
  • fills GPM rain everywhere;
  • no longer runs forever when a day has no values.
• to_geotiff() uses NaN as its nodata value, so dry days in clipped rain are kept. Very small clipped areas are now correctly placed on the map.
• compute('dtr', ...) and anomaly(climatology=...) raise an error if the two datasets are not on the same cells. SPEI raises an error for clipped tmax or tmin.

Full changelog: https://github.com/iamsaswata/imdlib/compare/0.2.0...0.3.0

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata 9 days ago

imdlib - Version: 0.2.0

Released 06 October 2026.

• Added load(), which downloads IMD data into a local cache, checks each file and returns an IMD object. It supports archive and real-time data (source='realtime', including rain_gpm), offline use, retries and download progress.

• Added imdlib.cache to show, clear, relocate and unlock the local data cache.

• Fixed get_data() and get_real_data() saving empty or wrong-size files. An empty reply from IMD (period not published yet) now raises DataNotAvailableError; an incomplete download raises DownloadError.

• Faster reading of .grd files in open_data() and open_real_data() (results are unchanged).

• heatwave() and coldwave() now read a normal period outside the loaded data with load(), so its files go into the cache instead of the current working directory.

Full changelog: https://github.com/iamsaswata/imdlib/compare/0.1.22...0.2.0

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata 10 days ago

imdlib - Version: 0.1.22

Released 21 September 2026.

• Added SPI and SPEI drought indices.

• Added heat wave and cold wave detection with daily classifications and annual day counts.

• Added Consecutive Dry Days (CDD) climate index.

• Added monthly climatology and anomaly computation.

• Added area-weighted spatial averaging using spatial_mean().

• Added support for date inputs and reading partial-year periods.

• Improved downloads by skipping existing files and corrected download-directory handling.

• Improved land masking for grid-cell calculations.

• Fixed variable metadata for computed outputs.

• Fixed compute() to restore metadata after a failed calculation.

• Updated API documentation, examples, references, and the paper citation.

• Fixed Read the Docs configuration and removed tracked build files.

• Updated package requirements to Python 3.10 or newer and pandas 2.2 or newer.

Full changelog: https://github.com/iamsaswata/imdlib/compare/0.1.21...0.1.22

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata 25 days ago

imdlib - Version: 0.1.21

What's Changed

• Fix #28 by @pratiman-91 in https://github.com/iamsaswata/imdlib/pull/37
• Code quality improvements by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/43
• Add real.py module to API documentation by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/40
• Remove duplicate open_data function by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/38
• Remove duplicate continue statement by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/41
• Fix broken test function parameter order by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/42
• Fix lat/lon validation logic bug by @iamsaswata in https://github.com/iamsaswata/imdlib/pull/39

Full Changelog: https://github.com/iamsaswata/imdlib/compare/0.1.20...0.1.21

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata 11 months ago

imdlib - Version: 0.1.20

1. Bug Fixes : Multi-polygon shapefile clipping
2. Bug Fixes : Climate indices geotiff conversion
3. Bug Fixes: Typos

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata over 2 years ago

imdlib - Version: 0.1.17

1. New feature : compute climate indices
2. New feature : fill missing data in IMD object
3. New feature : change resolution of IMD object
4. New feature : clip a IMD object for a roi using shapefile.
5. New feature : numpy like non-immutable copy of the IMD object

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata over 3 years ago

imdlib - Version: 0.1.15

1. New feature for handling real-time daily IMD rainfall and temperature data.
2. Updated link for new endpoints.
3. Bug fixes

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata almost 4 years ago

imdlib - Critical updates

1. Produces NetCDF data following CF-1.7 conventions.
2. Added support for converting data into Geo-TIFF format.
3. Improvement in return process of the imd.get_data() functionality
4. Updated the link form new https based data-load protocol.

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata almost 6 years ago

imdlib - Updates

Atmosphere - Meteorological Observation and Forecast - Python
Published by pratiman-91 over 6 years ago

imdlib - Better syntax support

Releasing it with different syntax support.

Atmosphere - Meteorological Observation and Forecast - Python
Published by iamsaswata over 6 years ago