{
  "repository": "https://github.com/evangowan/icesheet",
  "commit": "641d172230c76fc44ec9ea40ab1a0e9f76d0f42f",
  "years": [
    "0",
    "2500",
    "5000",
    "7500",
    "10000",
    "12500",
    "15000",
    "17500",
    "20000",
    "22500",
    "25000",
    "27500",
    "30000"
  ],
  "regions": [
    "North_America",
    "Eurasia",
    "Antarctica",
    "Patagonia"
  ],
  "method": "Original WGS84 GMT polygon vertices rounded to 0.001 degrees; nearest 2500-year snapshot; no geometric interpolation.",
  "simplification": "Douglas-Peucker tolerance 0.035 degrees; preserve rings with fewer than four simplified vertices"
}