Understanding the structure of tigris objects
By default, tigris returns objects of class Spatial*DataFrame from the sp package. Objects of class Spatial* represent components of spatial data in different slots, which include descriptions of the object's geometry, attributes, and coordinate system. In this exercise, we'll briefly examine the structure of objects returned by tigris functions.
Este exercício faz parte do curso
Analyzing US Census Data in R
Instruções do exercício
- Check the class of the Colorado counties object.
- Look at the first few rows of the
dataslot of the Colorado counties object. - Check the coordinate system of the
co_countiesobject by viewing theproj4stringslot.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# Check the class of the data
___(co_counties)
# Take a look at the information in the data slot
head(co_counties@___)
# Check the coordinate system of the data
___@proj4string