Table 1 Descriptions and characteristics of input, output and reference data used in this study.

From: HISDAC-US, historical settlement data compilation for the conterminous United States over 200 years

Name/Category Short Description Data type Temporal resolution Spatial resolution
Input
ZTRAX database Housing and property database provided by Zillow, with geolocation and temporal information CSV annual point locations
Output - main data products
Built-up intensity (BUI) Sum of gross indoor area (in m2) of all structures located within a given cell at a given year (cumulative) 1810-2015 Geo-TIFF, raster series, Integer Semi-decadal 250 m
First Built-Up Year (FBUY) First recorded year a structure has been built within a given cell extent; first year of settlement Geo-TIFF, raster composite, Integer Semi-decadal 250 m
Output - uncertainty layers
Inside Positional Uncertainty (IPU_BUI) For each cell in BUI rasters, the uncertainty that a point located inside could be outside; accompanying BUI raster series Geo-TIFF, raster series, Float Semi-decadal 250 m
Outside Positional Uncertainty (OPU_BUI) For each cell in BUI rasters, the uncertainty that a point located in adjacent cells could be inside; accompanying BUI raster series Geo-TIFF, raster series, Float Semi-decadal 250 m
Overall Potential Positional Uncertainty (OPPU_BUI) For each cell in BUI rasters, the average positional uncertainty, accompanying BUI raster series Geo-TIFF, raster series, Float Semi-decadal 250 m
Inside Positional Uncertainty (IPU_FBUY) For each cell in FBUY, the uncertainty that a point located inside could be outside, limited to unique locations of structures recorded at the time; accompanying FBUY raster composite Geo-TIFF, raster composite, Float Semi-decadal 250 m
Outside Positional Uncertainty (OPU_FBUY) For each cell in FBUY, the uncertainty that a point located in adjacent cell could be inside, limited to unique locations of structures recorded at the time; accompanying FBUY raster composite Geo-TIFF, raster composite, Float Semi-decadal 250 m
Overall Potential Positional Uncert. (OPPU_FBUY) For each cell in FBUY, the average positional uncertainty, limited to unique locations of structures recorded at the time; accompanying FBUY raster composite Geo-TIFF, raster composite, Float Semi-decadal 250 m
Temporal Uncertainty (TPixMiss) For each cell, the number of missing built-year records; accompanying FBUY raster composite Geo-TIFF, raster layer, Integer N/A 250 m
Thematic Uncertainty (APixMiss) For each cell, the number of missing records for building indoor area for each point in time; accompanying BUI raster series Geo-TIFF, raster series, Integer Semi-decadal 250 m
County-level (Cnty_Unc) uncertainty: Vector data, delineating county boundaries in 2010 with various uncertainty measures in the attribute table for mapping uncertainty ` ESRI shapefile N/A County
 -> TMiss: The sum of missing built year records in a county Attribute, Integer N/A County
 -> GeoMiss: The sum of missing or invalid geographic coordinates in a county Attribute, Integer N/A County
 -> LUMiss: The sum of records without landuse in a county Attribute, Integer N/A County
 -> AMiss: The sum of missing records for building indoor area over all years in a county Attribute, Integer N/A County
Reference layers based on integrated building footprints
 Reference-Built-up intensity (BUIRef) For each cell, the sum of building footprint area (in m2) of all structures located inside at a given year (cumulative) 1810-2015 Geo-TIFF, raster series, Integer Semi-decadal 250 m
 Reference-First Built-Up Year (FBUYRef) For each cell, the earliest built-up year reported used for validation of FBUY Geo-TIFF, raster composite, Integer Semi-decadal 250 m