diff --git a/04-spatial-operations.Rmd b/04-spatial-operations.Rmd
index b28a364b8..509aad0a4 100644
--- a/04-spatial-operations.Rmd
+++ b/04-spatial-operations.Rmd
@@ -9,10 +9,16 @@ library(sf)
 library(terra)
 library(dplyr)
 library(spData)
+```
+
+- You also need to read in a couple of datasets as follows for Section \@ref(spatial-ras)
+
+```{r 04-spatial-operations-1-1}
 elev = rast(system.file("raster/elev.tif", package = "spData"))
 grain = rast(system.file("raster/grain.tif", package = "spData"))
 ```
 
+
 ## Introduction
 
 Spatial operations are a vital part of geocomputation\index{geocomputation}.