About this map:

This map shows the variability in conductivity of limestone units that comprise the Northern Guam Lens Aquifer (NGLA). The source of the data is Rotzoll, K. et al. (2013), Estimating hydraulic properties from tidal attenuation in the Northern Guam Lens Aquifer (NGLA), Territory of Guam, USA; Hydrogeology Journal, Volume 21, Issue 3, pp. 643-654. The authors calculated conductivity values using SUTRA modeling, which produced an Adobe Illustrator file as output. The file received from authors was simplified, georeferenced using MAPublisher for Adobe Illustrator, and exported to a shapefile. Attributes found on the published map by the original authors were added.