diff --git a/images/postal_codes.png b/images/postal_codes.png
new file mode 100644
index 0000000..39205cd
Binary files /dev/null and b/images/postal_codes.png differ
diff --git a/images/postalcoades_roads.png b/images/postalcoades_roads.png
new file mode 100644
index 0000000..8ae5aca
Binary files /dev/null and b/images/postalcoades_roads.png differ
diff --git a/images/postalcodes_buildings.png b/images/postalcodes_buildings.png
new file mode 100644
index 0000000..8ae5aca
Binary files /dev/null and b/images/postalcodes_buildings.png differ
diff --git a/images/unused_buildings.png b/images/unused_buildings.png
new file mode 100644
index 0000000..929f5fb
Binary files /dev/null and b/images/unused_buildings.png differ
diff --git a/index.Rmd b/index.Rmd
index 6812f14..74ad733 100644
--- a/index.Rmd
+++ b/index.Rmd
@@ -339,7 +339,7 @@ pc_gdf.plot()
 plt.show()
 ```
 
-<img src="./images/roadsGDF.png" alt="Roads in Wageningen" width = "60%">
+<img src="./images/postal_codes.png" alt="Roads in Wageningen" width = "60%">
 
 
 ```{block, type="alert alert-success"}
@@ -380,10 +380,10 @@ pc_layer.set_xlim(xmin, xmax)
 pc_layer.set_ylim(ymin, ymax)
 
 # Save the figure to disk
-plt.savefig('./output/postalcoades_roads.png')
+plt.savefig('./output/postalcodes_buildings.png')
 ```
 
-<img src="./images/BuildingsAndRoads.png" alt="Buildings in Wageningen" width = "60%">
+<img src="./images/postalcodes_buildings.png" alt="Buildings in Wageningen" width = "60%">
 
 ```{block, type="alert alert-success"}
 > **Question 5**: How many buildings do you get? (hint: _len()_) Do you miss buildings? How can we extract missing buildings in our extent?
@@ -447,9 +447,10 @@ newBuildingsGDF = newBuildingsGDF.to_crs(epsg=3857)
 ax = newBuildingsGDF.plot(figsize=(10, 10), alpha=0.5, edgecolor='k')
 ctx.add_basemap(ax, source=ctx.providers.OpenStreetMap.Mapnik, zoom=17)
 ax.set_axis_off()
+plt.savefile()
 ```
 
-<img src="./images/NewBuildings.png" alt="Parcels at Wageningen University Campus" width = "60%">
+<img src="./images/unused_buildings.png" alt="Parcels at Wageningen University Campus" width = "60%">
 
 (Figures shown here and in the next section may differ slightly from the ones you obtain.)
 
diff --git a/index.html b/index.html
index 025a7b0..1e431ef 100644
--- a/index.html
+++ b/index.html
@@ -1465,7 +1465,7 @@ <h1 id="reading-from-webservices">Reading from webservices</h1>
 pc_gdf.plot()
 plt.show()</code></pre>
 </div>
-<p><img src="./images/roadsGDF.png" alt="Roads in Wageningen" width = "60%"></p>
+<p><img src="./images/postal_codes.png" alt="Roads in Wageningen" width = "60%"></p>
 <div class="row">
 <div class="alert alert-success">
 <blockquote>
@@ -1514,9 +1514,9 @@ <h1 id="reading-from-webservices">Reading from webservices</h1>
 pc_layer.set_ylim(ymin, ymax)
 
 # Save the figure to disk
-plt.savefig('./output/postalcoades_roads.png')</code></pre>
+plt.savefig('./output/postalcodes_buildings.png')</code></pre>
 </div>
-<p><img src="./images/BuildingsAndRoads.png" alt="Buildings in Wageningen" width = "60%"></p>
+<p><img src="./images/postalcodes_buildings.png" alt="Buildings in Wageningen" width = "60%"></p>
 <div class="row">
 <div class="alert alert-success">
 <blockquote>
@@ -1606,9 +1606,10 @@ <h1 id="selecting-data">Selecting data</h1>
 # Plot with 50% transparency
 ax = newBuildingsGDF.plot(figsize=(10, 10), alpha=0.5, edgecolor='k')
 ctx.add_basemap(ax, source=ctx.providers.OpenStreetMap.Mapnik, zoom=17)
-ax.set_axis_off()</code></pre>
+ax.set_axis_off()
+plt.savefile()</code></pre>
 </div>
-<p><img src="./images/NewBuildings.png" alt="Parcels at Wageningen University Campus" width = "60%"></p>
+<p><img src="./images/unused_buildings.png" alt="Parcels at Wageningen University Campus" width = "60%"></p>
 <p>(Figures shown here and in the next section may differ slightly from
 the ones you obtain.)</p>
 <h1 id="geometric-manipulations">Geometric manipulations</h1>