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Changelog

Source: NEWS.md

pycnogrid 0.2.1

  • Changed the default cell_allocation from "area" to "centroid". Centroid allocation preserves represented source-zone totals because each target cell is assigned to one source polygon.
  • Marked cell_allocation = "area" as experimental. Fractional area allocation preserves the overall represented total but may not preserve individual source-zone totals when target cells overlap multiple sources.
  • Added regression tests for individual source-zone preservation, including zero-valued source zones.

pycnogrid 0.2.0

CRAN release: 2026-07-10

  • Added to_grid() as the main interface for pycnophylactic interpolation to multiple grid systems.
  • Added support for A5, S2, ISEA, local raster and local hex grids.
  • Added cell_inclusion and cell_allocation options.
  • Added support for higher-order neighbourhood smoothing.
  • Added package vignette and expanded examples.
  • Improved tests and CRAN-readiness.

pycnogrid 0.1.0

  • Initial development release.
  • Added to_h3() for pycnophylactic interpolation to H3 grids.
  • Added example NYC census tract datasets.
  • Added unit tests and vignette infrastructure.