1. Spatio-temporal information in society: land change
Gilberto Câmara
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2. source: Global Land Project Science Plan (IGBP)

3. Land change: A quintessential spatial problem
Soybeans
Loggers
Small-scale Farming
Competition for land
Temos que avaliar a potencialidade de uso das area em relacao aos seus usos
Ranchers
Source: Dan Nepstad (Woods Hole)

4. Food Security Stock : 457 Mt = 2.5 mois Trade : 265 Mt = 12% /utilis.
18%
Others
14%
Maize
35%
Rice
20%
Wheat
Stock : 457 Mt = 2.5 mois Trade : 265 Mt = 12% /utilis.
31%
Source : WASDE december 2009
© GEO Secretariat

5. Changes in dietary patterns: Meat consumption
FAOSTAT 2007

6. Food challenge: prices are increasing

7. Where is the food coming from and going to?
graphics: The Economist

8. Net trade on food (FAO)

9. Food trade networks

10. Biodiesel and bioethanol

11. The food challenge: search for new land
graphics: The Economist

12. The food challenge: technology gaps
source: Nature

15. At what cost bio?

16. The Chinese are coming… to Africa
Trade between China and Africa surpassed $120 billion in China gives more loans to poor African countries than the World Bank.
graphics: The Economist

17. Modelling collective spatial actions: potential GIScience contributions
Space Agent
Agent Space
Benenson and Torrens, “Geographic Automata Systems”, IJGIS, 2005
(but many questions remain...)

18. Spatially-explicit land change models
Explain past changes, through the identification of determining factors of land use change;
Envision which changes will happen, and their intensity, location and time;
Assess how choices in public policy can influence change, by building different scenarios considering different policy options.