The inventory of GOA-ON assets can be searched interactively by region, platform type, and variables by using the Filters tool. The mapping layers contain contoured world-wide data; **Platforms** include icons for various observing assets, some of which display real-time data and many of which include links to data and metadata. For a given asset measuring carbonate chemistry, metadata includes information on which parameters are measured, links to data providers, and other useful details.
Protected areas data was derived from the World Database on Protected Areas (WDPA) dataset (source: www.protectedplanet.net). Exclusive Economic Zone data was derived from Flanders Marine Institute (2019). Maritime Boundaries Geodatabase: Maritime Boundaries and Exclusive Economic Zones (200NM), version 11. Available online at http:// www.marineregions.org/.
