Outer enclosure radical (Kangxi #31) — depicts a walled boundary. Indexes
图 in the bounded-space family with
国,
园,
困,
围,
圆. Pictures the framed border of a map, plan, or chart: a
图 is something drawn within defined edges. Note this is the bigger
囗 (wéi, U+56D7) not the smaller
口 (mouth, kǒu, U+53E3) — visually identical but distinct characters.