The document discusses mapping health data from travelers using R code and visualization. It proposes combining streaming data with questionnaires to detect patterns in health behaviors, outcomes, and environmental cues. It provides an example R code to map location points from a travel dataset on a map of Thailand. The code creates a data frame with latitude and longitude points, calls up a Stamen toner map of Thailand, plots the points on the map, and adds labels to the points. A two step process for mapping data with R is also outlined.