An sf object with the "十段线" (ten-segment line) national boundary in the South China Sea region, used as the default content of geom_submap().

bou_southsea

Format

An sf object with a single MULTILINESTRING feature (WGS 84), covering roughly 108-123°E and 3-25°N.

Source

ChinaBound2024, bou1_4l_十段线.shp.