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11 th International Symposium for GIS and Computer Cartography for Coastal Zones ManagementFigure 1. Architecture of the Ocean Health Toolbox offering three separate interfaces and two spatial extensions to the core Rstatistics library and text data files. A database gets used for advanced queries and web services are optionally available for mappingand charting.The application has tabs for navigating between its main panels:• Calculate – view or edit input files and configuration for calculating OHI.• Regions – view or edit regions with interactive map and hierarchical aggregation capability.• Report – output report with various options for inclusion of equations, path diagrams, maps, flowerplots, histograms, boxplots and in various output formats (e.g. html or pdf).• Layers – view or edit layers and visualize as a map, histogram or table.• Weights – use sliders for the goal weights to update a flower plot and weighted average index score.• Paths – click on paths to navigate between index, goals, dimensions, components and layers.This application is built with the new Shiny R package for generating a clean and direct interface to R. Shiny createsstyles and interaction with the Bootstrap and Jquery Javascript libraries. Other Javascript libraries are used formapping (Leaflet), table editing (Handsontable) and internationalization (Jed). The Javascript libraries and R serverinstance are locally run so the application does not require an internet connection.The workflow tools can be dragged onto a canvas and parameterized with a form interface. Outputs of one toolcan be wired into inputs of another. This scientific workflow is repeatable (Michener and Jones, 2012). Minortweaks at an early part of the process can be made with easy regeneration of all downstream outputs. This is particularlyvaluable for evaluating various scenarios, such as differing marine protected area networks or fisheries regulations.In order to provide a new input layer the data must be summarized by region. The required spatial intersection,attribute summary and possible rescaling are well suited as workflow tools. Geodesic buffer and area tools nowenable direct calculation on geographic coordinates without projecting to a Cartesian coordinate system such asMollweide. A set of Ocean Health tools is being produced for use in either commercial (ArcGIS ModelBuilder andArcMap) or open-source (Kepler and Quantum GIS) software.For complete fine-tune control a programmer can utilize a set of object-oriented functions from a custom R libraryor Python module. This is especially useful for automating calculation of the index over a range of parametervalues, such as for Monte Carlo or sensitivity analyses.Finally, web services will be setup by summer 2013 for easy consumption of existing Cumulative Impacts layersand generation of customizable regions. Creation of new regions is complicated by the fact that a traditional GISbuffers offshore overlap with each other. We are creating tools and output layers without overlap using Thiessenpolygons so that any distance buffer can be used against any of the 5 levels of subdivision in the Global AdministrativeAreas database (gadm.org). Presuming an internet connection, various Google Chart Tools (e.g. motion chart)will be a report output option, using the R package googleVis.60