{"generated":"2026-10-19","source":"OpenStreetMap natural=reef / natural=shoal / natural=coastline (coarse warning layer)","licence":"ODbL 1.0","attribution":"© OpenStreetMap contributors, Open Database License (openstreetmap.org/copyright). Derived database: docs/launch/odbl/.","block":{"s":10,"w":100,"n":15,"e":105},"res":0.05,"W":100,"H":100,"n":442,"cells":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAT+AAAAAAAAAAAAAAH8PwAAAAAAAAAAAADwABAAAAAAAAAAAAAIAAEAAAAAAAAAAAAAgABwAAAAAAAAAAAAAAACAAAAAAAAAAAAAIAAIAAAAAAAAAAAAAwAGgAAAAAAAAAAAABAAeAAAAAAAAAAAAAGAAYAAAAAAAAAAAAAQADgAAAAAAAAAAAADADGAAAAAAAAAAAAAIAFwAAAAAAAAAAAAAgAVAAAAAAAAAAAAACAACAAAAAAAAAAAAAAAB4AAAAAAAAAAAAAAAGAADAAAAAAAAAAAAAf/B/AAAAAAAAAAAAAc3/GAAAAAAAAAAAAAwD2YAAAAAAAAAAAADAMA4AAAAAAAAAAAAAAAA4AAAAAAAAAAAAAAAAwAAAAAAAACAAAAAADgAAAAAAAAIAAAAAADAAAAAAAAAAAAAAAAMAAAAAAAACAAAAAAAQYAAAAAAAIAAAAAAD9gAAAAAAAAAAAAAAPfAAAAAAAAAAAAAAAW2AAAAAAAAAAAAAABZMAAAAAAAAAAAAAAH4QAAAAAAAAAAAAAAPBAAAAAAAAAAAAAAAeGAAAAAAAAAAAAAAB4MAAAAAAAAAAAAAAHwQAAAAAAAAAAAAAADhgAAAAAAAAAAAAAAOCAAAAAAAAAAAAAAA4MAAAAAAAAAAAAAADAwAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAGAAAAAAAAAAAAAAAAcAAAAAAAAAAAAAAAB4AAAAAAAAAAAAAAAHgAAAAAAAAAAAAAAAeAAAAAAAAAAAAAAABwAAAAAAAAAAAAAAABgcAAAAAAAAAAAAAAGDQAAAAAAAAAAAAAAYNwAAAAAAAAAAAAADgjAAAAAAAAAAAAAAOCEAAAAAAAAAAAAAA7oYAAAAAAAAAAAAAB7ggAAAAAAAAAAAAABgGAAAAAAAAAAAAAAHAwAAAAAAAAAAAAAAePAAAAAAAAAAAAAAA4gYAAAAAAAAAAAAABuBgAAAAAAAAAAAAAGMv/AAAAAAAAAAAAAI/j8AAAAAAAAAAAAAD8Y8AAAAAAAAAAAAAAbw8AAAAAAAAAAAwAA5C4AAAAAAAAAAAMADEMgAAAAAAAAAAA4AGQzAAAAAAAAAABAAANINwAAAAAAAAAAAAAcA9gAAAAAAAAAAAABgXjAAAAAAAAAAAAAGAYHAAAAAAAAAAAAAcBwA="}