Data on Alaskan Population demographics ranging from 1940 to 2015

These data comprise Census records relating to the Alaskan people's population demographics for the State of Alaskan Salmon and People (SASAP) Project. Decennial census data were originally extracted from IPUMS National Historic Geographic Information Systems website: https://data2.nhgis.org/main (Citation: Steven Manson, Jonathan Schroeder, David Van Riper, and Steven Ruggles. IPUMS National Historical Geographic Information System: Version 12.0 [Database]. Minneapolis: University of Minnesota. 2017. http://doi.org/10.18128/D050.V12.0). A number of relevant tables of basic demographics on age and race, household income and poverty levels, and labor force participation were extracted. These particular variables were selected as part of an effort to understand and potentially quantify various dimensions of well-being in Alaskan communities. The file "censusdata_master.csv" is a consolidation of all 21 other data files in the package. For detailed information on how the datasets vary over different years, view the file "readme.docx" available in this data package. The included .Rmd file is a script which combines the 21 files by year into a single file (censusdata_master.csv). It also cleans up place names (including typographical errors) and uses the USGS place names dataset and the SASAP regions dataset to assign latitude and longitude values and region values to each place in the dataset. Note that some places were not assigned a region or location because they do not fit well into the regional framework. Considerable heterogeneity exists between census surveys each year. While we have attempted to combine these datasets in a way that makes sense, there may be some discrepancies or unexpected values. The RMarkdown document SASAPWebsiteGraphicsCensus.Rmd is used to generate a variety of figures using these data, including the additional file Chignik_population.png

本数据集包含与阿拉斯加鲑鱼与人类（State of Alaskan Salmon and People，SASAP）项目相关的阿拉斯加民众人口统计普查记录。
本次所用的十年一次人口普查数据最初提取自IPUMS国家历史地理信息系统（IPUMS National Historic Geographic Information Systems）网站：https://data2.nhgis.org/main（引用信息：Steven Manson、Jonathan Schroeder、David Van Riper与Steven Ruggles. IPUMS国家历史地理信息系统：版本12.0[数据库]. 明尼阿波利斯：明尼苏达大学，2017年. http://doi.org/10.18128/D050.V12.0）。
研究团队提取了涵盖年龄、种族、家庭收入与贫困水平、劳动力参与率的多组相关基础人口统计表格。选取上述变量，旨在探究并量化阿拉斯加社区福祉的多维度特征。
本数据包内的"censusdata_master.csv"文件为其余21个数据文件的整合版本。若需了解各数据集随年份变化的详细信息，请查阅本数据包中的"readme.docx"文件。
本数据包附带的.Rmd文件为整合脚本，可按年份将21个数据文件合并为单个文件（即"censusdata_master.csv"）。该脚本可清理地名（包括修正拼写错误），并借助美国地质调查局（USGS）地名数据集与SASAP区域数据集，为数据集中的每个地点分配经纬度坐标与所属区域标签。需注意，部分地点因不符合区域划分框架，未被赋予区域或位置信息。
各年份的普查调查存在显著异质性。尽管已尝试以合理逻辑整合各数据集，仍可能存在部分偏差或异常值。
R Markdown文档"SASAPWebsiteGraphicsCensus.Rmd"可基于本数据集生成各类可视化图表，配套文件"Chignik_population.png"即为其中一例。