Figure 1
From: Identifying indoor radon sources in Pa Miang, Chiang Mai, Thailand
adapted from map obtained from web site jAlbum.net (https://patricklepetit.jalbum.net/CHIANGMAI/MAPROOM/1476-072X-8-36-1-l.jpg).
Study area and sample point locations. (a) Geologic radon potential map overlaid on the map of Thailand, (b) location of Doi Saket district in Chiang Mai Province, (c) sampling point locations, marked by a GPS instrument (Garmin GPSmap 60CSx) and coordinated on the topographic map of Google Map (Map data 2020 Google). Map of geologic radon potential obtained from the Ministry of Industry, Department Mineral Resources (DMR) of Thailand (https://library.dmr.go.th/Document/DMR_Technical_Reports/2548/36805.pdf). Map of Thailand obtained from the Nations Online Project (https://www.nationsonline.org/oneworld/map/thailand-region-map.htm). Map of (b)
