nhgis.md
In ipumsr: An R Interface for Downloading, Reading, and Handling IPUMS Data

Can read NHGIS extract: single dataset

Code
  nhgis_csv <- read_nhgis(nhgis_single_csv)
Message
  Use of data from NHGIS is subject to conditions including that users should cite the data appropriately. Use command `ipums_conditions()` for more details.
  Rows: 71 Columns: 25
  -- Column specification --------------------------------------------------------
  Delimiter: ","
  chr  (9): GISJOIN, STUSAB, CMSA, PMSA, PMSAA, AREALAND, AREAWAT, ANPSADPI, F...
  dbl (13): YEAR, MSA_CMSAA, INTPTLAT, INTPTLNG, PSADC, D6Z001, D6Z002, D6Z003...
  lgl  (3): DIVISIONA, REGIONA, STATEA

  i Use `spec()` to retrieve the full column specification for this data.
  i Specify the column types or set `show_col_types = FALSE` to quiet this message.

We get informative error messages when reading NHGIS extracts

Code
  read_nhgis(nhgis_multi_ds, file_select = 3, verbose = FALSE)
Condition
  Error in `find_files_in()`:
  ! Can't select files past the end.
  i Location 3 doesn't exist.
  i There are only 2 files.
  Available files:
  * nhgis0731_csv/nhgis0731_ds239_20185_nation.csv
  * nhgis0731_csv/nhgis0731_ts_nominal_state.csv