Other ways to perform areal interpolation

- with `sf`: https://r-spatial.github.io/sf/reference/interpolate_aw.html
- with `areal`: https://chris-prener.github.io/areal/index.html
- comparison: https://cran.r-project.org/web/packages/populR/vignettes/areal-interpolation-comparison.html

Matched results between `areal` and `sfReapportion`:

https://github.com/briatte/sfReapportion/blob/master/README.md

Start by reviewing the linked sf, areal, and populR resources, then compare their descriptions with the sfReapportion README. The issue does not specify a change or completion criterion, so clarify whether the intended result is comparative documentation or another deliverable.

Written by the indexing model from the issue text.