Multi-Race, Except Part-American Indian Pop. Concentration - Central CA

The Relative concentration of the Central California region's population that identifies as "Multiracial", EXCEPT those with part-American Indian identity, in response to the Census questionnaire. "Relative concentration" is a measure that compares the proportion of population within each Census block group data unit that identifies as Multiiracial to the proportion of all people that live within the 4,961 census block groups in the Central California RRK region. People with part-American Indian identity are not included here but are included in the American Indian or Alaska Native Race Alone and Multirace Population, described above.

Data and Resources

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Field Value
Last Updated January 24, 2025, 06:53 (UTC)
Created January 24, 2025, 06:53 (UTC)
category /Social and Cultural Well-Being/Equitable Opportunity/Multi-race, Except Part-American Indian Pop. Concentration
collection_name California Landscape Metrics
creation_method Data reporting units are Census block groups. Standard block groups are clusters of Census blocks within the same census tract that have the same first digit of their 4-character census block number (e.g., Blocks 3001, 3002, 3003 to 3999 in census tract 1210.02 belong to block group 3). Block groups delineated for the 2020 Census generally contain 600 to 3,000 people. Census blocks are statistical areas bounded on all sides by visible features (e.g., streets, roads, streams, and railroad tracks), and by non-visible boundaries (e.g., city, town, township, county limits, and short line-of-sight extensions of streets and roads). Census blocks in suburban and rural areas may be large, irregular, and bounded by a variety of features (e.g., roads, streams, and/or transmission line rights-of-way). In remote areas, census blocks may encompass hundreds of square miles. Census blocks cover all territory in the United States, Puerto Rico, and the Island areas. Blocks do not cross the boundaries of any entity for which the Census Bureau tabulates data. See note 1. Data describing concentrations of population characteristics that are potentially related to environmental justice issues were provided to CWI through a collaboration with the USDA Forest Service, Geospatial Technology and Applications Center. The concentration methodology was created by GTAC for social science analysis applications within the Forest Service; it is based on research published in 2018 and 2020 (See Note 2). Data were compiled and prepared for incorporating in the Task Force regions by Mark Adams, Geographer, USFS-GTAC. For more information, contact: [mark.adams1@usda.gov](mailto:mark.adams1@usda.gov). Note: 1) The pixels attributed with a categorical data unit describing the relative concentration of MULTIRACE_NOT_AIAN_20 population are derived from a vector polygon feature that has been modified as follows: Census block groups from the Census Bureau's TIGER/Line geodatabase features for 2021 are selected based on their spatial intersection with the Central California RRK boundary. The resulting 4,961 block group features are modified by first erasing from the feature the area of all constituent Census blocks which have neither housing nor population recorded in the PL-94171 Redistricting dataset for 2020. In a second step, areas of federal and state public lands on which housing by definition is not located are erased from the interim feature. The result is a block group feature that depicts to the maximum practicable extent the areas within the block group where people that are represented by the Census Bureau's Census count could actually be residing. It is this modified block group feature that has been rasterized to match the 30m pixel grid that all biophysical datasets are reported in. References for the concentration levels analysis: Adams, Mark D. O. and S. Charnley. 2020. The Environmental Justice Implications of Managing Hazardous Fuels on Federal Forest Lands, Annals of the American Association of Geographers, 110:6, 1907-1935, DOI: 10.1080/24694452.2020.1727307 Adams, Mark D. O. and S. Charnley. 2018. Environmental justice and U.S. Forest Service hazardous fuels reduction: A spatial method for impact assessment of federal resource management actions. https://doi.org/10.1016/j.apgeog.2017.12.014 Data were derived from the 2020 Census Total population for the block group from the redistricting file (PL 94-171) of the 2020 Census, released summer 2021. The raw data were obtained directly from the Census Bureau data set table named in "Origin"; all data sets downloaded from census.data.gov and joined to TIGER Census block group features. There are 4,961 Census block groups within or intersecting the Central California RRK region boundary.
data_resolution 30m Raster
data_units Categorical
data_vintage 2020
encoding utf8
file_name CenCal_MULTIRACE_NOT_AIAN_2020_202312_T2_v5
format GeoTiff
harvest_object_id a1f4b4f5-dfaf-485e-9c40-083ab13591c6
harvest_source_id a2637971-af12-457f-ae4a-831d2202a539
harvest_source_title WIFIRE Commons
maximum_value 99.0
metric_definition_and_relevance The Relative concentration of the Central California region's population that identifies as "Multiracial", EXCEPT those with part-American Indian identity, in response to the Census questionnaire. "Relative concentration" is a measure that compares the proportion of population within each Census block group data unit that identifies as Multiiracial to the proportion of all people that live within the 4,961 census block groups in the Central California RRK region. People with part-American Indian identity are not included here but are included in the American Indian or Alaska Native Race Alone and Multirace Population, described above.
minimum_value 0.0
spatial {"type": "Polygon", "coordinates": [[[-123.0464753795284, 34.81949411991025], [-119.2971083717256, 34.81949411991025], [-119.2971083717256, 38.39206562098733], [-123.0464753795284, 38.39206562098733], [-123.0464753795284, 34.81949411991025]]]}
tier 2