Urban land area where elevation is below 5 meters (sq. km) - Sri Lanka
Low Elevation Coastal Zone ( LECZ ) Urban-Rural Population and Land Area Estimates, Version 3, Center For International Earth Science Information Network ( CIESIN ) - Columbia University, uri: earthdata.nasa.gov/data/catalog/sedac-ciesin-sedac-lecz-urplaev3-3.00, publisher: NASA Socioeconomic Data and Applications Center ( SEDAC ), date published: 2021
