Ground surface

Child codes

• XE1AK – Cliff
• XE2G4 – Open drain, channel
• XE3EC – Trench, ditch, pit
• XE5Y0 – Sewer grate
• XE94G – Slope, ramp

Sibling codes

• XE7CY – Certain specified surface conformation
• XE7K9 – Body of water

Foundation entity

Ground surface – http://id.who.int/icd/entity/1723185907