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==== Country geographic centers ====
 
==== Country geographic centers ====
 
The centroids can be found [http://worldmap.harvard.edu/data/geonode:country_centroids_az8 here]. In order to be able to calculate distances by road through OpenStreetMap, we need identify the closest town to this centroid.
 
The centroids can be found [http://worldmap.harvard.edu/data/geonode:country_centroids_az8 here]. In order to be able to calculate distances by road through OpenStreetMap, we need identify the closest town to this centroid.
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This approach does not work well for all countries:
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* landlocked countries (Burundi, Switzerland, Bhutan): where do they get their maritime goods from and how? We need to look at each country individually;
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* very large countries (Australia, Canada, Chili): we need to look at the territories within the country seperately;
    
==== Sea harbours ====
 
==== Sea harbours ====
    
==== Route matrix ====
 
==== Route matrix ====
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