{
  "description": "Progressive web learning strategy for SDG network visualizations with API integration",
  "categories": {
    "foundation": {
      "description": "Basic D3.js force-directed graphs and API integration (Iterations 1-5)",
      "urls": [
        {
          "url": "https://d3js.org/what-is-d3",
          "topic": "D3.js fundamentals and data binding",
          "techniques": ["data binding", "selections", "enter/update/exit pattern"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-graph",
          "topic": "Basic force-directed graph implementation",
          "techniques": ["force simulation", "node positioning", "link rendering"]
        },
        {
          "url": "https://d3-graph-gallery.com/network.html",
          "topic": "Network visualization gallery and examples",
          "techniques": ["color scales", "node sizing", "edge styling"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-graph-canvas",
          "topic": "Canvas-based force graphs for performance",
          "techniques": ["canvas rendering", "performance optimization", "event handling"]
        },
        {
          "url": "https://observablehq.com/@d3/temporal-force-directed-graph",
          "topic": "Adding interactivity to force graphs",
          "techniques": ["drag behavior", "zoom", "tooltip interactions"]
        }
      ]
    },
    "intermediate": {
      "description": "Advanced D3 techniques and multi-API integration (Iterations 6-12)",
      "urls": [
        {
          "url": "https://observablehq.com/@d3/sticky-force-layout",
          "topic": "Sticky force layout for better control",
          "techniques": ["fixed positions", "sticky drag", "layout constraints"]
        },
        {
          "url": "https://observablehq.com/@d3/clustered-force-layout",
          "topic": "Force-based clustering",
          "techniques": ["cluster forces", "group positioning", "collision detection"]
        },
        {
          "url": "https://observablehq.com/@d3/arc-diagram",
          "topic": "Alternative network layouts",
          "techniques": ["arc diagrams", "hierarchical layouts", "radial layouts"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-lattice",
          "topic": "Custom force implementations",
          "techniques": ["custom forces", "lattice constraints", "force composition"]
        },
        {
          "url": "https://observablehq.com/@d3/color-schemes",
          "topic": "Advanced color schemes for networks",
          "techniques": ["sequential scales", "diverging scales", "categorical colors"]
        },
        {
          "url": "https://observablehq.com/@d3/connected-particles",
          "topic": "Animated network transitions",
          "techniques": ["particle systems", "edge animation", "smooth transitions"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-graph-component",
          "topic": "Modular graph components",
          "techniques": ["component architecture", "reusable patterns", "state management"]
        }
      ]
    },
    "advanced": {
      "description": "Complex algorithms and real-time data (Iterations 13-20)",
      "urls": [
        {
          "url": "https://observablehq.com/@d3/hierarchical-edge-bundling",
          "topic": "Edge bundling for clarity",
          "techniques": ["hierarchical bundling", "edge aggregation", "path smoothing"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-tree",
          "topic": "Force-directed trees and hierarchies",
          "techniques": ["tree forces", "hierarchy layout", "parent-child links"]
        },
        {
          "url": "https://observablehq.com/@mbostock/adaptive-sampling",
          "topic": "Adaptive rendering for large graphs",
          "techniques": ["level of detail", "culling", "adaptive sampling"]
        },
        {
          "url": "https://observablehq.com/@d3/versor-dragging",
          "topic": "3D network rotations",
          "techniques": ["quaternion rotation", "3D projection", "spherical layout"]
        },
        {
          "url": "https://observablehq.com/@d3/voronoi-labels",
          "topic": "Smart label placement",
          "techniques": ["voronoi diagrams", "collision-free labels", "dynamic positioning"]
        },
        {
          "url": "https://observablehq.com/@d3/zoom-to-bounding-box",
          "topic": "Advanced zoom and focus",
          "techniques": ["semantic zoom", "focus+context", "smooth camera transitions"]
        },
        {
          "url": "https://observablehq.com/@mbostock/the-wealth-health-of-nations",
          "topic": "Real-time data integration",
          "techniques": ["data streaming", "time series", "dynamic updates"]
        },
        {
          "url": "https://observablehq.com/@d3/graph-layout-force-directed",
          "topic": "Graph layout algorithms comparison",
          "techniques": ["layout selection", "parameter tuning", "performance trade-offs"]
        }
      ]
    },
    "expert": {
      "description": "Cutting-edge techniques and AI integration (Iterations 21+)",
      "urls": [
        {
          "url": "https://observablehq.com/@d3/force-directed-graph-with-minimap",
          "topic": "Multi-view graph interfaces",
          "techniques": ["minimap", "multiple synchronized views", "overview+detail"]
        },
        {
          "url": "https://observablehq.com/@mbostock/phase-portrait",
          "topic": "Dynamic system visualization",
          "techniques": ["phase space", "attractor visualization", "vector fields"]
        },
        {
          "url": "https://observablehq.com/@fil/occlusion-hello-world",
          "topic": "3D occlusion and depth",
          "techniques": ["depth sorting", "occlusion culling", "3D rendering"]
        },
        {
          "url": "https://observablehq.com/@d3/graph",
          "topic": "Graph theory algorithms",
          "techniques": ["shortest path", "centrality measures", "community detection"]
        },
        {
          "url": "https://observablehq.com/@mbostock/saving-svg",
          "topic": "Export and sharing capabilities",
          "techniques": ["SVG export", "image generation", "data export"]
        }
      ]
    },
    "api_discovery": {
      "description": "Web search templates for finding open APIs",
      "search_templates": [
        {
          "query": "environmental data API swagger site:github.com",
          "domain": "Environmental APIs",
          "expected_sources": ["air quality", "water quality", "climate data"]
        },
        {
          "query": "scientific data REST API openapi",
          "domain": "Scientific Data",
          "expected_sources": ["biodiversity", "satellite", "research datasets"]
        },
        {
          "query": "sustainable development goals API JSON",
          "domain": "SDG Data",
          "expected_sources": ["UN data", "World Bank", "development indicators"]
        },
        {
          "query": "atmospheric weather data API free",
          "domain": "Atmospheric Data",
          "expected_sources": ["weather", "air quality", "climate"]
        },
        {
          "query": "water quality watershed API REST",
          "domain": "Water Data",
          "expected_sources": ["USGS", "EPA", "water monitoring"]
        },
        {
          "query": "forest biodiversity data API open source",
          "domain": "Ecological Data",
          "expected_sources": ["Global Forest Watch", "species data", "conservation"]
        },
        {
          "query": "NOAA ocean marine data API",
          "domain": "Ocean Data",
          "expected_sources": ["ocean temperature", "marine life", "coastal data"]
        },
        {
          "query": "NASA earth observation API",
          "domain": "Satellite Data",
          "expected_sources": ["satellite imagery", "earth science", "remote sensing"]
        },
        {
          "query": "seismic earthquake API USGS",
          "domain": "Geophysical Data",
          "expected_sources": ["earthquake", "volcano", "geological"]
        },
        {
          "query": "WHO global health statistics API",
          "domain": "Health Data",
          "expected_sources": ["disease", "healthcare", "mortality"]
        }
      ],
      "api_evaluation_criteria": [
        "Has Swagger/OpenAPI specification",
        "Provides JSON/REST endpoints",
        "Free tier or open access available",
        "Good documentation",
        "Active maintenance (updated recently)",
        "Network-ready data (entities with relationships)",
        "Relevant to SDGs or sustainability"
      ]
    },
    "data_integration": {
      "description": "Resources for API integration and data merging",
      "urls": [
        {
          "url": "https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch",
          "topic": "Modern fetch API usage",
          "techniques": ["async/await", "error handling", "CORS"]
        },
        {
          "url": "https://observablehq.com/@observablehq/introduction-to-data",
          "topic": "Data loading and transformation",
          "techniques": ["data parsing", "cleaning", "transformation pipelines"]
        },
        {
          "url": "https://observablehq.com/@d3/d3-fetch",
          "topic": "D3 data fetching utilities",
          "techniques": ["d3.json", "d3.csv", "data type inference"]
        }
      ]
    },
    "graph_algorithms": {
      "description": "Graph theory and network analysis resources",
      "urls": [
        {
          "url": "https://observablehq.com/@d3/disjoint-force-directed-graph",
          "topic": "Disconnected graph handling",
          "techniques": ["component detection", "separate force simulations"]
        },
        {
          "url": "https://observablehq.com/@d3/force-directed-graph?intent=fork",
          "topic": "Customizable force parameters",
          "techniques": ["force strength tuning", "link distance optimization"]
        },
        {
          "url": "https://observablehq.com/@mbostock/paths-in-a-force-directed-graph",
          "topic": "Path finding and highlighting",
          "techniques": ["shortest path", "path visualization", "connected components"]
        }
      ]
    }
  },
  "iteration_mapping": {
    "1-5": "foundation",
    "6-12": "intermediate",
    "13-20": "advanced",
    "21+": "expert"
  },
  "fallback_strategy": {
    "description": "When pre-defined URLs are exhausted, use dynamic web search",
    "search_patterns": [
      "D3.js force directed graph [specific_technique]",
      "network visualization [technique] observable",
      "graph layout algorithm [specific_algorithm]",
      "[api_domain] open API swagger github",
      "force simulation [parameter] tuning d3"
    ]
  },
  "priming_urls": {
    "description": "Initial URLs to fetch before starting any iteration for foundational knowledge",
    "urls": [
      "https://d3js.org/what-is-d3",
      "https://observablehq.com/@d3/force-directed-graph",
      "https://github.com/public-apis/public-apis"
    ]
  }
}