Mapping distance from villages to healthcare facilities in Thailand
Using village location data from here and healthcare facility location data from here, I used the Google Maps Direction API to compute the distance between villages and the 5 nearest neighbouring healthcare facilities arrived at via the k-nearest neighbour algorithm. The villages marked are those that are classified as being remote, according the Ministry of Public Health's criteria; in other words, they are located over 22.5 kilometres away (Figure 1) or over 30 minutes away by car (Figure 2) from the closest healthcare facility.
The analysis was conducted using R and the leaflet package was used to create the following visualisations.
Villages located over 22.5 kilometres from the closest healthcare facility
Villages that require over 30 minutes commute by car to the closest healthcare facility