pub fn land_bitmap() -> &'static [u8] ⓘ
180×90 bitmap of land (1) vs water (0), each cell = 2°×2°. Row 0 = 90°N–88°N, Row 89 = 88°S–90°S. Col 0 = 180°W–178°W, Col 179 = 178°E–180°E.