This polygon shapefile contains the national boundary of Tonga (adm0). This layer is part of the Global Administrative Areas 2015 (v2.8) dataset. Hijmans, R. and University of California, Berkeley, Museum of Vertebrate Zoology. (2015). National Boundary, Tonga, 2015. UC Berkeley, Museum of Vertebrate Zoology. Available at: http://purl.stanford.edu/kh701cm7797 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.