island reference dataset

Most accurate island shoreline dataset currently available, adjusted from Sayre et al. (2019) to be used as reference dataset for island naming in TABS R-package. 

Sayre, R., S. Noble, S. Hamann, R. Smith, D. Wright, S. Breyer, K.  Butler, K. Van Graafeiland, C. Frye, D. Karagulle, D. Hopkins, D.  Stephens, K. Kelly, Z. Basher, D. Burton, J. Cress, K. Atkins, D. Van  Sistine, B. Friesen, R. Allee, T. Allen, P. Aniello, I. Asaad, M.  Costello, K. Goodin, P. Harris, M. Kavanaugh, H. Lillis, E. Manca, F.  Muller-Karger, B. Nyberg, R. Parsons, J. Saarinen, J. Steiner, and A.  Reed. 2019. A new 30 meter resolution global shoreline vector and associated global islands database for the development of standardized  ecological coastal units. Journal of Operational Oceanography, 12:sup2,  S47-S56, DOI: 10.1080/1755876X.2018.1529714