What's a raster object?
Just like sp
classes, the raster
classes have methods to help with basic viewing and manipulation of objects, like print()
and summary()
, and you can always dig deeper into their structure with str()
.
Let's jump in and take a look at a raster we've loaded for you, pop
. Keep an eye out for a few things:
- Can you see where the coordinate information is kept?
- Can you tell from the
summary()
how big the raster is? - What do you think might be stored in this raster?
This exercise is part of the course
Visualizing Geospatial Data in R
Exercise instructions
- Print
pop
to the console. - Call
str()
onpop
withmax.level = 2
. - Call
summary()
onpop
.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
library(raster)
# Print pop
# Call str() on pop, with max.level = 2
# Call summary on pop