diff --git a/.gitignore b/.gitignore
index 2f32432..c0ad3f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,7 @@ docs
 /_site/
 output/*
 Manifest.toml
+
+**/*.quarto_ipynb
+
+reference/
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..8f9e01d
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "julia.environmentPath": "${workspaceFolder}",
+}
\ No newline at end of file
diff --git a/Project.toml b/Project.toml
index 1c306d4..b1afe9e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,6 +5,7 @@ CairoMakie = "13f3f980-e62b-5c42-98c6-ff1f3baf88f0"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 DimensionalData = "0703355e-b756-11e9-17c0-8b28908087d0"
 FlexiJoins = "e37f2e79-19fa-4eb7-8510-b63b51fe0a37"
+GLMakie = "e9467ef8-e4e7-5192-8a1a-b1aee30e663a"
 GeoDataFrames = "62cb38b5-d8d2-4862-a48e-6a340996859f"
 GeoFormatTypes = "68eda718-8dee-11e9-39e7-89f7f65f511f"
 GeoInterface = "cf35fbd7-0cd7-5166-be24-54bfbe79505f"
@@ -17,6 +18,7 @@ MakieCore = "20f20a25-4f0e-4fdf-b5d1-57303727442b"
 NaturalEarth = "436b0209-26ab-4e65-94a9-6526d86fea76"
 Proj = "c94c279d-25a6-4763-9509-64d165bea63e"
 Rasters = "a3a2b9e3-a471-40c9-b274-f788e487c689"
+Revise = "295af30f-e4ad-537b-8983-00126c2a3abe"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 Tyler = "e170d443-b9d6-418a-9ee8-061e966341ef"
diff --git a/_quarto.yml b/_quarto.yml
index e5bef0a..6aaeef0 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -59,5 +59,5 @@ format:
   #     text: |
   #       \printindex
 
-jupyter: julia
+engine: julia
 bibliography: geocompjl.bib
diff --git a/chapters/01-spatial-data.qmd b/chapters/01-spatial-data.qmd
index 61bae22..f84a880 100644
--- a/chapters/01-spatial-data.qmd
+++ b/chapters/01-spatial-data.qmd
@@ -114,7 +114,6 @@ display(fig);
 Illustration of vector (point) data in which location of London (the red X) is represented with reference to an origin (the blue circle). 
 The left plot represents a geographic CRS with an origin at 0° longitude and latitude. 
 The right plot represents a projected CRS with an origin located in the sea west of the South West Peninsula.
-:::
 
 There is more to CRSs, as described in @sec-coordinate-reference-systems-intro and @sec-reproj-geo-data but, for the purposes of this section, it is sufficient to know that coordinates consist of two numbers representing the distance from an origin, usually in $x$ and $y$ dimensions.