New Datasets Released by SEDAC
Three new datasets have been released by the NASA Socioeconomic Data and Applications Center (SEDAC; WDS Regular Member):
Gridded Population of the World (GPWv.4.10)
The first ever global dataset on the spatial distribution of population broken down by age group and male versus female is now available. The most recent update to the fourth version of the Gridded Population of the World (GPWv.4.10) data collection contains a unique data set on basic demographic characteristics related to age structure and sex ratios for the world, based on the 2010 round of national censuses.
The free, downloadable data and descriptions, including documentation and maps, are available at: http://sedac.ciesin.columbia.edu/data/collection/gpw-v4/whatsnewrev10
This dataset provides detailed administrative boundary data for India (village/town-level) together with more than 200 socioeconomic variables from the 1991 and 2001 censuses. The data are available for the 28 states and combined Union Territories in existence in 1991 and 2001. The dataset was developed as part of a research project on the dynamics and determinants of land change in India by Prasanth Meiyappan of the University of Illinois and colleagues from India and from Columbia University. This is the second dataset in the India Data Collection, which also includes the dataset, India Annual Winter Cropped Area, v1 (2001–2016).
The Global PM_2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD) with Geographically Weighted Regression (GWR), v1 (1998–2016)
SEDAC has also released a new dataset on global patterns of fine particulate matter (PM_2.5) over nearly two decades. The dataset consists of estimated annual concentrations (micrograms per cubic meter) of PM_2.5, with dust and sea salt removed, on a grid of 0.01 degree resolution, or about 1 km at the equator. This version supersedes a previous dataset with coarser resolution (0.1 degree, or about 10 km) and data only through 2012.
The new dataset combines AOD measurements from the NASA Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), and the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) with a chemical transport model. GWR is used to adjust estimates drawing on available ground-based measurements.