The GHSL image analytics framework has been tested with a large set of sensors including all radar and optical commercial and civilian governmental missions. Bi-lateral agreements of JRC with European institutions and institutions in China, Brazil and South Africa are currently producing continental and country-wide human settlement information layers by application of the GHSL technology to their proprietary image data.
A world-complete collection of GHSL data was produced using open satellite data records, in order to facilitate the sharing of scientific knowledge and the standardization of practices in the analysis of global human settlements. In this frame, historical records of Landsat imagery organized in four collections (1975, 1990, 2000, and 2014) at 15m, 30m, and 60m of spatial resolution, with various sensor characteristics were processed. The global image collections of the epochs 1975, 1990, and 2000 were downloaded from the Global Land Cover Facility (GLCF) of the University of Maryland (http://glcf.umd.edu/data/). The collection of 2014 was downloaded by the JRC directly from the USGS site (http://landsat.usgs.gov/).