SocScape - resources

HIGH RESOLUTION DEMOGRAPHIC GRIDS

We developed three types of high resolution grids: population grids; subpopulation (or race-specific) grids; diversity/dominant race classification grids.

High resolution grids have been calculated from census blocks using dasymetric modeling technique. The spatial resolution of these grids is 30m.

DATA FORMAT: GeoTiff

DATA AVAILABILITY: each county and 363 metropolitan areas for 1990, 2000 and 2010 as multi-year comparable datasets (called “myc”).
For 2010 we also made available additional datasets, that used more detailed ancillary information, but cannot be used for change analysis.

Population and racial diversity/dominant race grids for the conterminous U.S are available via SocScape – GeoWeb application. GeoWeb application allows for exploring U.S data down to street level and download data for the area up to 100,000 sq. km.

Data for the counties and metropolitan areas are organized as a zip archive with population, race-specific and diversity/dominanrt race grids.

GO TO DOWNLOAD

MORE INFORMATION:

  • A. Dmowska, T. F. Stepinski, P. Netzel (2017) Comprehensive framework for visualizing and analyzing spatio-temporal dynamics of racial diversity in the entire United States, PLoS ONE 12 (3): e0174993. paper (open access)
  • A. Dmowska and T. F. Stepinski (2017) A high resolution population grid for the conterminous United States: The 2010 edition. Computers, Environment and Urban Systems 61, pp. 13-23. paper, preprint

 


RACIAL DIVERSITY CHANGE DATASET

Racial diversity change dataset shows temporal changes in racial diversity/dominant race in a single map. Changed areas are shown in stripes with the color of narrower stripes indicating the earlier year (f.e 1990) and broader stripes indicating the later year (f.e. 2000). Unchanged areas are shown in original color assign to this class in racial diversity maps. Detailed description of racial diversity change dataset is here.

DATA FORMAT: ESRI Shapefile

DATA AVAILABILITY: 351 urban areas within metropolitan areas for 1990-2000, 2000-2010 and 1990-2010 comparison.

GO TO DOWNLOAD


RACIAL DOT MAPS

Racial dot maps shows spatial distribution of a population density and the full racial composition in a single map. In a dot map each dot represents one person and it's colored by their race. This dataset was calculated using 2010 high resolution grids (instead of census units) and each dot is randomly placed within a 30x30m grid cell. Each dot has assigned one of 7 racial/ethnicity categories: (non-Hispanic) white, black, Asians, Pacific Islanders, Native Americans, others and Hispanic.

DATA FORMAT:  ESRI Shapefile.
Race categories are stored in race_cat column in the attribute table, while race_id contains numeric identification for race.

DATA AVAILABILITY: each county in the conterminous U.S.; 2010 year. 
Data are organized as a zip archive for each state in the conterminous U.S. Each zip archive contain racial dot maps for the counties in this state. 

Dot map for other years can be calculated using R script and high resolution grids available here.

GO TO DOWNLOAD

MORE INFORMATION

  • A. Dmowska and T. F. Stepinski (2019) Racial Dot Maps Based on Dasymetrically Modeled Gridded Population Data, Soc. Sci. 8(5), 157  paper (open access)

RACIAL COMPOSITION IN THE US CITIES USING HISTORICAL CENSUS TRACTS (1910-2010)

Using available census tract data provided by the NHGIS project we unified race categories and calculated race dominant/diversity classes for 63 metropolitan areas. Such data can be used to illustrate changes in the racial composition in 1910-2010.

DATA FORMAT:  ESRI Shapefile
Attribute table contains following information: code and name of county, state, MSA and tract information, total number of population and the number of subpopulations by given race, percent of given race and a class from dominant race/diversity classification. The location information is based on 2010 US Decennial Census to assure comparability between years. The race-specific information is the unified race classification.

DATA AVAILABILITY: metropolitan areas (MSA) for which at least data from 1950 is available (list of MSA).
Data are organized as a zip archive for  metropolitan area. Each zip archive contains ESRI shapefile for available years and QGIS legend file to map racial diversity classification.

GO TO DOWNLOAD

MORE INFORMATION

  • A. Dmowska, T. F. Stepinski (2019) Mapping changes in racial composition  in the United States 1910-2010 using US census tract historical data  (paper submitted to Social Science). 

 

Published on  January 3rd, 2020

Announcements

Information theory provides a consistent framework for the analysis of spatial patterns - blog post.

sabre: or how to compare two maps? - blog post.

GeoPAT2: Entropy calculations for local landscapes - blog post.

Blog posts series introducing GeoPAT 2 - a software for pattern-based spatial and temporal analysis.

ClimateEx
new version of a Web-based query-by-example tool for finding places with similar climate is available here.

SocScape
now more detailed (30 m ) population and racial diversity grids for 1990, 2000, 2010 are available here.

Resources for mapping racial segregation and diversity are available here.

Resources for mapping racial segregation and diversity using historical census tract data (1910 -  2010) are available here.