Lesson 4 : OSM Data & GIS Operations in R Part 2
Episode 16: Basic GIS Operations with R
Videos Credits: Clémentine Cottineau, Ignacio Urria Yáñez
In this episode, you’re about to learn how to perform some of basic GIS operations using sf package in R.
Conservation in Brielle, NL
How to select the features in an old school way?
What would be the 2nd step after selecting the buildings?
What would be the biggest impact of conservation, and how to prioritize the buildings to be conserved?
Should the conservation have an offset (i.e., distance)?
Tip: Counting the buildings
The count of buildings within a zone with densities would be good measure since there are small and big buildings.
Conservation Pt. 2
Question about building count
How to know how many buildings there are?
Answer to the question
Conservation Pt. 3
Buffers
Should we work in meters in terms of the projection?
Answer to the question
There’s a second answer to the question
Buffers Pt. 2
Using the st_buffer() function
Question about st_buffer
Does the st_buffer creates the buffer from the edges and not from the central points?
Answer to the question
Union
How to create a new variable?
Question about the use of CRS
Why are we using crs or why should we use st_crs to define crs in st_transform?
Answer to the question
Centroids
Centroids Pt. 2
Centroids Pt. 3
Why doesn’t it make sense to put the data in ggplot straight away?
Answer to the question
Centroids Pt. 4
Intersection & Join
How do you intersect something using sf?
Answer to the question
Another answer to the question
Intersection & Join Pt. 2
Intersection & Join Pt. 3
group_by() function
Intersection & Join Pt. 4
st_join to join the attributes to the geometries
Should we convert the layer into a data frame?
Answer to the question
Alternative answer
Maps of the Buildings
Area & Density Calculation
Challenge: Change of the rules
Further description
Challenge solution
Outro
Wrap Up