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xyz location of internal point of each Census 2020 block, for spatial index in EJAM

Source: R/data_quaddata.R
quaddata.Rd

data.table for use in EJAM

Details

See EJAM package for more info.

Created by census2020_get_data() and census2020_save_datasets()

This package can create this data table but does not store it.

Rows: 8,174,955

Columns:

  • blockid (for joins among tables blockwts, blockpoints, quaddata, blockid2fips) unique integer 1 through number of rows (blocks), used as a more efficient ID than a 15-character FIPS code.

  • x, y, z coordinates as shown below:



  str(quaddata)

  Classes ‘data.table’ and 'data.frame':	8174955 obs. of  4 variables:

   $ BLOCK_X: num  205 205 204 204 204 ...
   $ BLOCK_Z: num  2125 2125 2125 2126 2126 ...
   $ BLOCK_Y: num  -3334 -3334 -3334 -3334 -3334 ...
   $ blockid: int  1 2 3 4 5 6 7 8 9 10 ...

     - attr(*, ".internal.selfref")=<externalptr>
     - attr(*, "sorted")= chr "blockid"
     - attr(*, "census_version")= num 2020
     - attr(*, "acs_version")= chr "2016-2020"
     - attr(*, "ejscreen_version")= chr "2.1"
     - attr(*, "ejscreen_releasedate")= chr "September 2022"