Detect missing Figures from the book pdf for Chapter 6 (Henkka)

[HTenkanen]

Outdated Notebooks (pull the latest version from Github):

• chapter-06/nb/05-spatial-queries.ipynb

Missing figures:

• [x] Figure 6.33 (perhaps due to outdated notebook?)
• [x] Figure 6.38 (Chapter 6.8, spatial-join-basic-idea.png)
• [x] Figure 6.39 (Chapter 6.8, spatial-join-alternatives.png)
• [x] Figure 6.42 (Chapter 6.8, Interactive map)
• [x] Figure 6.43 (Chapter 6.9, nearest-neighbour.png)
• [x] Figure 6.47 (Chapter 6.9, interactive map)
• [x] Figure 6.48 (Chapter 6.9, interactive map)
• [x] Figure 6.49 (Chapter 6.9, interactive map)
• [x] Figure 6.50 (Chapter 6.10, vector_overlay_processes.png)
• [x] Figure 6.51 (Chapter 6.9, interactive map)