Hello CTPP-News:

Well, the newest news is that Census 2020 PL94-171 data is re-scheduled for release this coming Thursday, August 12th. Hope everyone is ready.

I did a lot of messing around with the R package TIGRIS this past spring. I’m not sure why I didn’t share it at that time, but here it is now. Hope it helps.

https://www.rdocumentation.org/packages/tigris/versions/1.4.1

from the author’s page:
tigris is an R package that allows users to directly download and use TIGER/Line shapefiles (https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.html) from the US Census Bureau.


Here is Kyle Walker’s March 2021 lecture on “Spatial Analysis of US Census Data” on youtube.com. Watch it!

https://youtu.be/GqC1HjAKui4


TIGRIS is working and ready for Census 2020 geographies!! So when the PL94-171 data is available this coming Thursday, I’m expecting a lot of people to get really busy with it!

(Refer back to my 7/23/21 post regarding the R package PL94171. My next example might be some stitching the TIGER files with the PL 94-171 demographic data!)

I’m attaching two of my R scripts that test a ton of the capability of TIGRIS. I’m not “attaching” any demographic data to the geographic layers, just yet. The purpose here is to get a hold of these TIGER/Line shapefiles, and get ready for newer (or older) census data from the decennial census or the American Community Survey.

My Part I script includes the following examples:

#  1.1  -- County Boundaries in California (Detailed TIGER/Highest Resolution)
#  1.2  -- Exporting SHP files to a local computer drive
#    2  -- County Boundaries in California (Medium Resolution)
#    3  -- County Boundaries in California (Lowest Resolution)
#  4.1  -- Tract Boundaries for One County
#  4.2  -- Tract Boundaries for One County, Multiple Census Years (1990-2020)
#    5  -- Tract Boundaries for Multiple Counties in a State
#    6  -- Block Group Boundaries for Multiple Counties in a State
#    7  -- Block Boundaries for Multiple Counties in a State
#    8  -- Place Boundaries within a State
#    9  -- PUMA Boundaries within a State
#   10  -- Consolidated Statistical Areas in the USA
#   11  -- Core-Based Statistical Areas in the USA
#   12  -- Congressional Districts in the USA, single state, and filtering states
#   13  -- Urbanized Areas in the USA
#   14  -- State Legislative Districts (Upper/Lower House) for a State
#   15  -- Zip Code Tabulation Areas, Selected for a State and within state
#   16  -- State Boundaries in the USA

My Part II script includes the following examples:

#  1   -- Roads for Counties, Multiple Counties within State
#  2   -- Primary & Secondary Roads within a State
#  3   -- Rails for the USA
#  4.1 -- Water Areas for Multiple Counties within a State
#  4.2 -- Water Lines for Multiple Counties within a State
#  5   -- Point & Area Landmarks within a State

That’s all for now. Happy Saturday afternoon, and IPA Day!

Chuck Purvis,
Hayward, Califorina

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