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
By: , and 

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Abstract

A new 30-m spatial resolution global shoreline vector (GSV) was developed from annual composites of 2014 Landsat satellite imagery. The semi-automated classification of the imagery was accomplished by manual selection of training points representing water and non-water classes along the entire global coastline. Polygon topology was applied to the GSV, resulting in a new characterisation of the number and size of global islands. Three size classes of islands were mapped: continental mainlands (5), islands greater than 1 km2 (21,818), and islands smaller than 1 km2 (318,868). The GSV represents the shore zone land and water interface boundary, and is a spatially explicit ecological domain separator between terrestrial and marine environments. The development and characteristics of the GSV are presented herein. An approach is also proposed for delineating standardised, high spatial resolution global ecological coastal units (ECUs). For this coastal ecosystem mapping effort, the GSV will be used to separate the nearshore coastal waters from the onshore coastal lands. The work to produce the GSV and the ECUs is commissioned by the Group on Earth Observations (GEO), and is associated with several GEO initiatives including GEO Ecosystems, GEO Marine Biodiversity Observation Network (MBON) and GEO Blue Planet.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A new 30 meter resolution global shoreline vector and associated global islands database for the development of standardized ecological coastal units
Series title Journal of Operational Oceanography
DOI 10.1080/1755876X.2018.1529714
Edition Online First
Year Published 2019
Language English
Publisher Taylor & Francis
Contributing office(s) Land Change Science