The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the years 2000. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the year 2005. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the year 2010. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the year 2015. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
The Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11 consists of estimates of human population density (number of persons per square kilometer) based on counts consistent with national censuses and population registers, for the year 2020. A proportional allocation gridding algorithm, utilizing approximately 13.5 million national and sub-national administrative units, was used to assign population counts to 30 arc-second grid cells.
In response to climate change impacts like rising sea levels, efforts are being made in the Pacific Islands region to assess and adapt to the effects on mangroves. This includes improving management practices, reducing stress on mangroves, and integrating climate data into land-use planning to minimize risks to coastal ecosystems and human safety.
This document, serving as both the Final Management Plan (FMP) and Final Environmental Impact Statement (EIS), outlines proposed revisions to sanctuary regulations led by the National Oceanic and Atmospheric Administration (NOAA) and involves collaboration with the American Samoa Department of Commerce (AS DOC).
The Integrated Feasibility Report and Environmental Assessment (IFR/EA) is a study led by the Honolulu District of the Pacific Ocean Division of USACE, with the American Samoa Government as the non-Federal sponsor. It focuses on addressing flood risk in the Tafuna-Leone Plain of Tutuila Island, which is densely populated and vulnerable to frequent flooding due to heavy rainfall, shallow stream channels, and various development-related factors.