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TopoJSON encodes geometry as topology and, compared to GeoJSON, avoids the duplication of shared spatial data. This is particularly relevant for shared arcs where boundaries overlap.

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2023 Landscan data

The newly available 2023 Landscan data is now used as the default option for calculating population estimates for data in the Spatial Domaindomain has been updated to use the newly available 2023 Landscan data, superceding the 2022 Landscan data.

Learn more about accessing population estimates from the Spatial Domain, including options to change the population source and year.

Renamed Data Series columns

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