@{li2021choropleth,
title = {{Visualizing accessibility with choropleth maps}},
author = {David Li and Hanan Samet and Amitabh Varshney},
booktitle = {Proceedings of the 5th ACM SIGSPATIAL International Workshop on Location-based Recommendations, Geosocial Networks and Geoadvertising (LocalRec 21)},
year = {2021},
month = {November},
publisher = {ACM},
keywords = {Choropleth, maps, road distance, accessibility},
doi = {10.1145/3486183.3492801},
pages = {Article 9: 1-4}
}