7.1 sf

sf provides simple feature access

• replaces packages sp, rgeos, rgdal
• interface with tidyverse
• geometrical operations with GEOS or s2geometry
• coordinate transformations

sf objects have

• data.frame or tibble
• sfc: geometry list-column

7.1.1 Metadata

• sf_column: the name of the (active) geometry column
• agr: attribute-geometry relationship

how to read a summary of an sf object