Global 1-km Downscaled Urban Land Extent Projection and Base Year Grids by SSP Scenarios, 2000-2100

The Global 1-km Downscaled Urban Land Extent Projection and Base Year Grids by SSP Scenarios, 2000-2100 consists of global SSP-consistent spatial urban land fraction data for the base year 2000 and projections at ten-year intervals for 2010-2100 at a resolution of 1-km (about 30 arc-seconds). An algorithm was developed and validated to downscale the 1/8-degree resolution data set to 1-km resolution. For a given decade, the downscaling algorithm allocates the 1/8-degree decadal amount of urban land expansion to 1-km grid cells in proportion to their total urban land amounts at the beginning of the decade. The algorithm uses an iterative process to collect any overflows from already highly-developed 1-km grid cells, and then allocates them to 1-km grid cells that are not yet fully developed. This iterative process repeats itself until all 1/8-degree amounts of urban land expansion are allocated to 1-km grid cells with no overflow. The downscaling process is applied decade by decade throughout the 21st century for each urban land expansion scenario. The final product is a set of global maps displaying the 1-km fraction of urban land, updated at decadal intervals throughout the 21st century, for five different urban land expansion scenarios consistent with the Shared Socioeconomic Pathways (SSPs).

Data and Resources

Additional Info

Field Value
Maintainer undefined
Last Updated April 23, 2025, 20:16 (UTC)
Created April 23, 2025, 20:16 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Gao, J. and M. Pesaresi. 2021-11-01. Global 1-km Downscaled Urban Land Extent Projection and Base Year Grids by SSP Scenarios, 2000-2100. Version 1.00. Palisades, NY. Archived by National Aeronautics and Space Administration, U.S. Government, NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/1z4r-ez63. https://doi.org/10.7927/1z4r-ez63.
creator Gao, J. and M. Pesaresi
graphic-preview-description Sample browse graphic of the data set.
graphic-preview-file https://sedac.ciesin.columbia.edu/downloads/maps/ssp/ssp-1-km-downscaled-urban-land-extent-projection-base-year-ssp-2000-2100/sedac-logo.jpg
harvest_object_id d404fd46-450e-4e3d-95b4-d176bb36d258
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C2161983020-SEDAC
issued 2021-11-01
landingPage https://doi.org/10.7927/1z4r-ez63
language {en-US}
metadata_type geospatial
modified 2021-11-01
programCode {026:001}
publisher SEDAC
release-place Palisades, NY
resource-type Dataset
source_datajson_identifier true
source_hash 4a6fe0046c551c1427639f29b7a39077bbb227dbd3d6ed922fe903fe390b7a8f
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 2000-01-01T00:00:00Z/2100-12-31T00:00:00Z
theme {SSP,geospatial}