Session Ready
Exercise

Introduction to Spatial Data

We have been mapping points, but there are several spatial features that can be mapped, including polygons. In R, polygons are often stored in a SpatialPolygonsDataFrame that holds the polygon, coordinate information, and a data frame with one row per polygon.

A SpatialPolygonsDataFrame called shp that contains the zip code boundaries for North Carolina has been loaded for you. shp has five slots that store various types of information:

  1. data: data associated with each polygon
  2. polygons: coordinates to plot polygons
  3. plotOrder: order in which polygons are plotted
  4. bbox: bounding box for geographic data (i.e., a rectangle)
  5. proj4string: coordinate reference system

Let's take a closer look inside the shp object.

Instructions 1/3
undefined XP
  • 1

    Print the summary() of the shp data.

  • 2

    Print the class of shp.

  • 3

    Print the slot names of shp.

Loading