This is an example of how to visualize typological data on world maps using Voronoi tessellation using R and a chapter from WALS. The code has been extended by Christoph Rzymski to work with Cross-Linguistic Data Formats (CLDF) and is provided as a recipe in the CLDF Cookbook, so that users can visualize any CLDF data set.
A full description of our visualization approach and reasoning is provided in:
Garland McNew, Curdin Derungs and Steven Moran. 2018. Towards faithfully visualizing global linguistic diversity. In Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018), 805-809. May 7-12, Miyazaki, Japan. Online: http://www.lrec-conf.org/proceedings/lrec2018/pdf/813.pdf
We also keep a copy of our paper in this repository, as well as the poster that we presented at LREC 2018.