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).

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Additional Info

Field Value
Maintainer undefined
Last Updated April 23, 2025, 23:00 (UTC)
Created April 1, 2025, 00:14 (UTC)
accessLevel public
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catalog_@id https://data.nasa.gov/data.json
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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 61eaef95-0d68-44f1-8631-c81ab028c912
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
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}