Description Usage Format Details Source Examples
There are six supplemental census tract boundary packages for use with SeerMapper. The are SeerMapperRegs, SeerMapperEast, SeerMapperWest for the 2000 census and Seer2010MapperRegs, Seer2010MapperEast and SeerMapper2010West for the 2010 census. The combination of the either three provide a set of census tract boundaries for one U. S. census year (either 2000 or 2010). The SeerMapperRegs and Seer2010MapperRegs packages contains the census tract boundaries for the 19 states the have U. S. Seer Registries. The remaining census tract boundaries are split into two packages for each census year based on whether the state is east or west of the Mississippi river. The census tracts for 20 states, district and territory without registries east of the Mississippi river at contained in the SeerMapperEast and Seer2010MapperEast packages. The tract boundaries for the 13 states west of the Mississippi river are in the SeerMapperWest and Seer2010MapperWest packages. The states include the District of Columbia and Puerto Rico. This package contains the 2010 census tract boundaries for the 19 states with Seer Registries.
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This dataset contains a set of SpatialPolygons structures for the 19 states with Seer Registries. Each state structure is a list of the census tracts boundaries that the state. Refer to the documentation on the sp package for details on the strucures. Each list element is a "polygons" class structure containing attributes of the census tract (label point, area, ID, etc.) and a list of "Polygons" class elements that define the boundary polygons.
The SeerMapperRegs and SeerMapper2010Regs packages contains 19 states with Seer Registries including:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | FIPS Name
02 Alaska
04 Arizona
06 California
09 Connecticut
13 Georgia
15 Hawaii
16 Idaho
19 Iowa
21 Kentucky
22 Louisiana
25 Massachusett
26 Michigan
34 New Jersery
35 New Mexico
36 New York
40 Oklahoma
49 Utah
53 Washington
55 Wisconsin
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The SeerMapper package contains the state and county boundary data for all 51 states and DC and the Seer Registry boundary data for the 24 established registries. Due to space limitations, the base packages cannot contain the census tract boundary data.
Three supplemental data packages are used for each census year to provide the census tract boundary data to SeerMapper package.
Each state ".rda" file (dataset) contains state's census tract boundary data. The file name structure is trXX_dYY, where tr identifies the file as census tract boundary data, "XX" is the state (2 digits) fips code and "YY" represents the census year (e.g., 00 = 2000 or 10 for 2010)
To conserve disk space and downloading/installation time, the rda files are compressed using the "xy" method.
The U. S. Census Bureau census tract boundary shape file data was pre- processed by "www.MapShaper.org" website version 01.15 using modified Visvalingam method with the intersection repair and prevent shape removal options enabled, the coordinate precision value set to 0.0 and the simplify parameter set to 10 by 85 alignments.
When the SeerMapper package is install, the six (6) census tract boundary supplement packages are also install automatically by R. The SeerMapper package then manages the loading of the packages to ensure the needed boundary files are available.
The census tract boundary shapefiles were downloaded from the CENSUS.GOV web site for the 2010 Census census tract boundary shapefiles, https://www2.census.gov/geo/tiger/GENZ2010/gz_2010_XX_140_00_500k.zip, where XX is the state FIPS code.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #
# These examples are a test to ensure each census tract file
# can be read and a plot of the state generated.
#
require("sp")
#
# If you want to save the example output PDF files, change the
# the following "tempDir()" to the path you want to save the output files.
# For Example: outDir <- "c:/RTestPDFs"
outDir <- tempdir()
cat("Output Directory used:",outDir,"\n")
stList <- c("02","04","06","09","13",
"15","16","19","21","22",
"25","26","34","35","36",
"40","49","53","55")
stName <- c("Alaska","Arizona","California","Connecticut","Georgia",
"Hawaii","Idaho","Iowa","Kentucky","Louisiana",
"Massachusett","Michigan","New Jersery","New Mexico","New York",
"Oklahoma","Utah","Washington","Wisconsin")
cY <- "10"
outFile <- paste0("SeerMapperRegs",cY,"-CT.pdf")
outFN <- file.path(outDir,outFile)
cat("Output example PDF file:",outFN,"\n")
pdf(outFN,width=7,height=10)
for (stN in seq(from=1, to=length(stList), by=7)) { # test draw 3 of 19 states
stID <- stList[stN]
stNa <- stName[stN]
trFN <- paste0("tr",stID,"_d",cY)
TT_tr <- paste0("U. S. Census Tracts - ",stNa," Fips=",stID," file=",trFN)
data(list=trFN)
wrSP <- get(trFN)
#str(wrSP)
plot(wrSP,main=TT_tr)
rm(list=trFN)
}
dev.off()
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