chicago {spatstat.data}

Chicago Crime Data

Description

This dataset is a record of spatial locations of crimes reported in the period 25 April to 8 May 2002, in an area of Chicago (Illinois, USA) close to the University of Chicago. The original crime map was published in the Chicago Weekly News in 2002.

The data give the spatial location (street address) of each crime report, and the type of crime. The type labels are interpreted as follows:

assault	battery/assault
burglary	burglary
cartheft	motor vehicle theft
damage	criminal damage
robbery	robbery
theft	theft
trespass	criminal trespass

All crimes occurred on or near a street. The data give the coordinates of all streets in the survey area, and their connectivity.

Spatial coordinates are expressed in feet (one foot is 0.3048 metres).

The dataset chicago is an object of class "lpp" representing a point pattern on a linear network. See lpp for further information on the format.

These data were published and analysed in Ang, Baddeley and Nair (2012).

Usage

data(chicago)

Format

Object of class "lpp". See lpp.

Source

Chicago Weekly News, 2002. Manually digitised by Adrian Baddeley [e-mail].

References

Ang, Q.W. (2010) Statistical methodology for events on a network. Master's thesis, School of Mathematics and Statistics, University of Western Australia.

Ang, Q.W., Baddeley, A. and Nair, G. (2012) Geometrically corrected second-order analysis of events on a linear network, with applications to ecology and criminology. Scandinavian Journal of Statistics 39, 591–617.

Chicago Weekly News website: http://www.chicagoweeklynews.com

Examples

data(chicago)
  if(require(spatstat.linnet)) {
plot(chicago)
plot(as.linnet(chicago), main="Chicago Street Crimes",col="green")
plot(as.ppp(chicago), add=TRUE, col="red", chars=c(16,2,22,17,24,15,6))
  }