Extent of coral reefs
This map shows the extent of coral reefs around Pohnpei. The data layer shown here is a subset of Pohnpei base layer derived by Island Research & Education Initiative (iREi) from Digital Line Graphs (DLGs) of U.S. Geological Survey (USGS) 1:25,000-scale topographic maps (2001). The shoreline was slightly shifted and partly updated around Kolonia and its vicinity based on WorldView-3 satellite imagery from DigitalGlobe (2016).