Spatial Points

Everything is related to everything else, but near things are more related to each other.

Learning Objectives

For this topic you will learn to:

Describe the need for projections. Identify both ellipsoids and datum as associated with geospatial points within a Coordinate Reference System. Create point data de novo. Display point data using ggplot, leaflet, and sf objects. Import raw numerical data from within a data.frame into a sf object. Perform basic point-related activities.


Here are some supplementary sources for the content herein:

  • The complete narrative for this topic.
  • A cheat sheet for the sf library.
  • A presentation from the authors about the sf library from the 2018 rstudio::conf.


Knowledge of the content for each topic is evaluated using interactive data-intensive assessment.