#Assignment-10: Fourth Part

On page 32 of Lecture #10, the following command was used to retrieve county-level map files:

t_county <- counties(cb = TRUE)

According to Tigris package of R cb is by default set as FALSE. If cb=False, it downloads more detail map file. The size of more detail version of the map is relatively larger and is very time consuming to use of analysis. For this reason, cb is needed to set as TRUE which enables to get more generalized map file and is very convenient to use for analysis.