load 200 or 2010 census data

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Description

Loads SpatialPolygonDataFrames representing the 2000 or 2010 census. If the dataset packages are not present they are installed (via the internet).

Usage

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loadCensusData(state,level=c("county","tract","blkgrp","blk","cdp"),
		year=c("2010","2000"), verbose=TRUE, osmTransform=TRUE, envir = .GlobalEnv)

Arguments

state

the name of the state (lower case)

level

the detail level of the dataset. note that blkgrp and blk yield very large datasets

year

census year

verbose

how verbose to be

osmTransform

should data be loaded in the OpenStreetMaps mercator projection

envir

the environment where the data should be loaded

Examples

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## Not run: 
loadCensusData(state = 'california')
plot(california.county10)

## End(Not run)