Rio de Janeiro

Source identity and administrative path

The source row behind Rio de Janeiro is GeoNames ID 3451190. Its recorded administrative path is Rio de Janeiro → Brazil, and GeoNames classifies the place as a first-order administrative seat.

Rio de Janeiro occurs once as a primary city label in this atlas sample; the numeric ID remains the durable source key if names change. The city row itself was updated 2026-04-13; that date belongs to the source record, not to every transport or visitor detail in the real destination.

Population position inside fixed cohorts

Within the fixed 1,206-record atlas, Rio de Janeiro ranks 45 by recorded population. Inside the 48 selected Brazil entries it ranks 2; inside the 198 entries in its broad region it ranks 6.

Its 6,747,815 population value is 8.90 times the 758,563 median for the country cohort and 8.27 times the 816,326 regional median. Rio de Janeiro falls inside the leading tenth of this atlas's Brazil population cohort.

Rio de Janeiro's recorded value reaches at least twice the country-cohort median in this snapshot. These comparisons describe this selected dataset only; they are not current census rankings or official urban-area boundaries.

Nearest-reference pattern

Rio de Janeiro's three nearest other atlas coordinates are Niterói at 8.453 km with 515,317 recorded people; Duque de Caxias at 18.882 km with 866,347 recorded people; Belford Roxo at 27.307 km with 518,384 recorded people. The closest-to-farthest distance spread is 18.854 km. Compared with Niterói, Rio de Janeiro's recorded population is 13.09 times as large. Against Rio de Janeiro, Niterói follows Niteroi → Rio de Janeiro → Brazil in the source. Its point has higher latitude and higher longitude; it belongs to the same selected Brazil cohort, uses the shared America/Sao_Paulo identifier, and carries populated place rather than first-order administrative seat.

Its recorded population is below Rio de Janeiro's. Against Rio de Janeiro, Duque de Caxias follows Duque De Caxias → Rio de Janeiro → Brazil in the source. Its point has higher latitude and lower longitude; it belongs to the same selected Brazil cohort, uses the shared America/Sao_Paulo identifier, and carries populated place rather than first-order administrative seat. Its recorded population is below Rio de Janeiro's. Against Rio de Janeiro, Belford Roxo follows Belford Roxo → Rio de Janeiro → Brazil in the source.

Its point has higher latitude and lower longitude; it belongs to the same selected Brazil cohort, uses the shared America/Sao_Paulo identifier, and carries populated place rather than first-order administrative seat. Its recorded population is below Rio de Janeiro's. Its nearest-neighbor distance ranks 133 of 1,206 from shortest to longest in the same snapshot. Rio de Janeiro's nearest-coordinate gap falls between the tightest tenth and quarter of the atlas. This pattern can reveal whether other catalog references are geographically close, but it cannot establish whether a border crossing is possible or practical, or whether rail, road, fare, or journey-time connections exist.

Read as one record signature, GeoNames 3451190, the coordinate pair 22.9064 / 43.1822, country rank 2 of 48, and neighbor GeoNames 3456283 at 8.453 km bind Rio de Janeiro to a reproducible comparison. That combined key distinguishes the row; it is not a recommendation or evidence of a physical connection.

Coordinate, time-zone and class cohorts

Rio de Janeiro's reference point is 22.9064° south and 43.1822° west. The IANA identifier America/Sao_Paulo is shared by 30 city rows in this catalog, while the GeoNames class PPLA is shared by 429 rows. Rio de Janeiro's row carries both second- and first-order administrative labels.

Rio de Janeiro's point falls in the lower-latitude coordinate band used by this atlas's row checks. Rio de Janeiro's time-zone field defines the narrower catalog cohort; its place class is shared more broadly. GeoNames supplies no elevation for Rio de Janeiro, so the profile preserves that missing value instead of guessing terrain.

Together these fields form a reproducible identity check for this page, not a claim about walkability, climate or accessibility.