About: http://webisa.webdatacommons.org/109298139

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Once you have determined which area of the map could be classified as city, or urban area, you could provide statistics such as mean and variance to describe the height and variations in the height.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com