EXPSOU

1. within the range of depth of the surrounding depth area: the depth corresponds to the depth range of the surrounding depth area. i.e. the depth is not shoaler than the minimum depth of the surrounding depth area or deeper than the maximum depth of the surrounding depth area.
2. shoaler than the range of depth of the surrounding depth area: the depth is shoaler than the minimum depth of the surrounding depth area.
3. deeper than the range of depth of the surrounding depth area: the depth is deeper than the maximum depth of the surrounding depth area.