Historical settlement composite layer for the U.S. 1810 - 2015

These files are part of the dataset "Historical settlement composite layer for the U.S. 1810 - 2015", contained in the dataverse “HISDAC-US: Historical Settlement Data Compilation for the United States” (https://dataverse.harvard.edu/dataverse/hisdacus). They are geospatial raster layers with pixel values representing the year the first structure has been recorded (FBUY) at 250m spatial resolution, and several positional uncertainty measures (FBUY_IPU, FBUY_OPU and FBUY_OPPU). The files are organized in .tar.gz archives. The readme file provides additional information. Data source: Zillow Transaction and Assessment Dataset (ZTRAX), Zillow Inc. -- Corrigendum: The spatial reference system used to project the layers was incorrectly described in version 1.0. This has been corrected in this new version.