To directly wrestle with these challenges, we built an interactive citizen science web
mapping application, conducted a usability evaluation, and gained experience by listening to
website users. Our objectives were to build the website, determine general perceptions,
discover potential problems, iteratively improve the website, discuss citizen science websites
in relation to online PPGIS, examine the role(s) websites may play in the citizen science
research model, discuss how citizen science research advances GIScience, and offer guidelines
to improve citizen-based web mapping applications.