The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.

United States Population: All Ages data was reported at 325,719.000 Person th in 2017. This records an increase from the previous number of 323,406.000 Person th for 2016. United States Population: All Ages data is updated yearly, averaging 176,356.000 Person th from Jun 1900 (Median) to 2017, with 118 observations. The data reached an all-time high of 325,719.000 Person th in 2017 and a record low of 76,094.000 Person th in 1900. United States Population: All Ages data remains active status in CEIC and is reported by US Census Bureau. The data is categorized under Global Database’s United States – Table US.G002: Population by Age. Series Remarks Population data for the years 1900 to 1949 exclude the population residing in Alaska and Hawaii. Population data for the years 1940 to 1979 cover the resident population plus Armed Forces overseas. Population data for all other years cover only the resident population.

Population Census: Northeast: Paraiba data was reported at 3,974,687.000 Person in 2022. This records an increase from the previous number of 3,766,528.000 Person for 2010. Population Census: Northeast: Paraiba data is updated yearly, averaging 2,810,032.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 3,974,687.000 Person in 2022 and a record low of 490,784.000 Person in 1900. Population Census: Northeast: Paraiba data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

This dataset is a census of penguin colony counts from the year 1900 in the Antarctic region. It forms part of the Inventory of Antarctic seabird breeding sites within the Antarctic and subantarctic islands. The Antarctic and subantarctic fauna database (seabirds) is a database detailing the distribution and abundance of breeding localities for Antarctic and Subantarctic seabirds. Each species' compilation was produced by members of the SCAR Bird Biology Subcommittee.

This separate metadata record has been created beacause it represents only the penguin colony counts that have been published to OBIS. Note: The Year (not day or month) date is only relevent in this dataset. The positions that have been published to OBIS include latitude and longitude positions that were not included within the original dataset. The latitude and longitude positions that were not noted by the observer have been created from the locality given by the observer using the Antarctic Composite Gazetteer.

Two spreadsheets are available for download, from the URL given below. The original, unmodified spreadsheet is available, as well as a corrected spreadsheet. In the corrected spreadsheet, the AADC has attempted to reconcile the poorly presented localities into a single column. It is possible that some of these localities may not be correct.

The fields in this dataset are:

SCAR Number Species Region Locality Longitude Latitude Number of Colonies Number of Pairs Type and accuracy of count Data Date References Remarks

These data are further referenced in ANARE Research Notes 9 - see reference below.

Brazil Population Census: Total data was reported at 203,080,756.000 Person in 2022. This records an increase from the previous number of 190,755,799.000 Person for 2010. Brazil Population Census: Total data is updated yearly, averaging 121,150,573.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 203,080,756.000 Person in 2022 and a record low of 17,438,434.000 Person in 1900. Brazil Population Census: Total data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC001: Population Census.

Population Census: South: Santa Catarina data was reported at 7,610,361.000 Person in 2022. This records an increase from the previous number of 6,248,436.000 Person for 2010. Population Census: South: Santa Catarina data is updated yearly, averaging 3,687,652.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 7,610,361.000 Person in 2022 and a record low of 320,289.000 Person in 1900. Population Census: South: Santa Catarina data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Southeast: Rio de Janeiro data was reported at 16,055,174.000 Person in 2022. This records an increase from the previous number of 15,989,929.000 Person for 2010. Population Census: Southeast: Rio de Janeiro data is updated yearly, averaging 11,489,797.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 16,055,174.000 Person in 2022 and a record low of 1,737,478.000 Person in 1900. Population Census: Southeast: Rio de Janeiro data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

NODC Standard Marine Bird Sighting, Land Census (F034) is one of a group of seven datasets related to Marine Birds from Coastal Alaska and Puget Sound Data (1975 -1980). Each dataset uses the NODC Taxonomic Code to indicate species.

Marine Bird Sighting, Land Census (F034) contains data from field observations of marine birds made along land survey tracks. These data are collected to provide information on population density and distribution and breeding locales. The contents and structure of data type file are similar to Marine Bird Sighting, Aircraft Census (F033), although the transect distance of land surveys will normally be shorter than that of ship and aircraft surveys. In this data type the investigator defines the lateral dimension of survey distance unit (a specified number of whole meters). Start and end position, date and elapsed time, and number of distance units are reported for each survey. Environmental information may include meteorological and adjacent sea surface conditions, distance to nearest shoreline, ice characteristics, and debris, including oil slicks. Species data may include age, sex, color, plumage, number of individuals, flight direction, behavior, and foodsource association. Any number of species may be reported within one observation time span. These data were collected in 1975 - 1980 for coastal Alaska.

Population Census: Southeast data was reported at 84,840,113.000 Person in 2022. This records an increase from the previous number of 80,364,410.000 Person for 2010. Population Census: Southeast data is updated yearly, averaging 52,580,527.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 84,840,113.000 Person in 2022 and a record low of 7,824,011.000 Person in 1900. Population Census: Southeast data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC005: Population Census: by Region.

The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. This project contains the files necessary to closely replicate the links between the 1900 and 1910 censuses. For more information, consult the included Read Me file, and visit https://censustree.org.

Population Census: South data was reported at 29,937,706.000 Person in 2022. This records an increase from the previous number of 27,386,891.000 Person for 2010. Population Census: South data is updated yearly, averaging 19,380,126.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 29,937,706.000 Person in 2022 and a record low of 1,796,495.000 Person in 1900. Population Census: South data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC005: Population Census: by Region.

Population Census: North: Amazonas data was reported at 3,941,613.000 Person in 2022. This records an increase from the previous number of 3,483,985.000 Person for 2010. Population Census: North: Amazonas data is updated yearly, averaging 1,449,135.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 3,941,613.000 Person in 2022 and a record low of 249,756.000 Person in 1900. Population Census: North: Amazonas data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Northeast: Sergipe data was reported at 2,210,004.000 Person in 2022. This records an increase from the previous number of 2,068,017.000 Person for 2010. Population Census: Northeast: Sergipe data is updated yearly, averaging 1,156,642.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 2,210,004.000 Person in 2022 and a record low of 356,264.000 Person in 1900. Population Census: Northeast: Sergipe data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Southeast: Espirito Santo data was reported at 3,833,712.000 Person in 2022. This records an increase from the previous number of 3,514,952.000 Person for 2010. Population Census: Southeast: Espirito Santo data is updated yearly, averaging 2,063,679.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 3,833,712.000 Person in 2022 and a record low of 209,783.000 Person in 1900. Population Census: Southeast: Espirito Santo data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Northeast: Rio Grande do Norte data was reported at 3,302,729.000 Person in 2022. This records an increase from the previous number of 3,168,027.000 Person for 2010. Population Census: Northeast: Rio Grande do Norte data is updated yearly, averaging 1,933,126.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 3,302,729.000 Person in 2022 and a record low of 274,317.000 Person in 1900. Population Census: Northeast: Rio Grande do Norte data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Central West: Mato Grosso data was reported at 3,658,649.000 Person in 2022. This records an increase from the previous number of 3,035,122.000 Person for 2010. Population Census: Central West: Mato Grosso data is updated yearly, averaging 1,169,812.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 3,658,649.000 Person in 2022 and a record low of 118,025.000 Person in 1900. Population Census: Central West: Mato Grosso data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: Northeast: Pernambuco data was reported at 9,058,931.000 Person in 2022. This records an increase from the previous number of 8,796,448.000 Person for 2010. Population Census: Northeast: Pernambuco data is updated yearly, averaging 6,244,275.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 9,058,931.000 Person in 2022 and a record low of 1,178,150.000 Person in 1900. Population Census: Northeast: Pernambuco data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Population Census: South: Parana data was reported at 11,444,380.000 Person in 2022. This records an increase from the previous number of 10,444,526.000 Person for 2010. Population Census: South: Parana data is updated yearly, averaging 7,749,752.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 11,444,380.000 Person in 2022 and a record low of 327,136.000 Person in 1900. Population Census: South: Parana data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC008: Population Census: by State.

Brazil Population Census: Male data was reported at 98,532,431.000 Person in 2022. This records an increase from the previous number of 93,406,990.000 Person for 2010. Brazil Population Census: Male data is updated yearly, averaging 52,735,041.500 Person from Jul 1900 (Median) to 2022, with 12 observations. The data reached an all-time high of 98,532,431.000 Person in 2022 and a record low of 8,900,526.000 Person in 1900. Brazil Population Census: Male data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Brazil Premium Database’s Socio and Demographic – Table BR.GAC001: Population Census.

Population Census: Central West data was reported at 16,289,538.000 Person in 2022. This records an increase from the previous number of 14,058,094.000 Person for 2010. Population Census: Central West data is updated yearly, averaging 7,003,515.000 Person from Jul 1900 (Median) to 2022, with 13 observations. The data reached an all-time high of 16,289,538.000 Person in 2022 and a record low of 373,309.000 Person in 1900. Population Census: Central West data remains active status in CEIC and is reported by Brazilian Institute of Geography and Statistics. The data is categorized under Global Database’s Brazil – Table BR.GAC005: Population Census: by Region.