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Global shipping network
The Global shipping network is the worldwide network of maritime traffic. From a network science perspective ports represent nodes and routes represent lines. Transportation networks have a crucial role in today’s economy, more precisely, maritime traffic is one of the most important drivers of global trade.
== History ==
Despite the estimates that 90% of world trade is transported on water, the shipping industry is probably less in the public eye than other sectors. Due to bigger vessels and economies of scale – partly also because of the appearance of standardized containers - the cost of shipping is quite cheap: a transport of a DVD player costs only $1.5 to reach Europe. Today’s most crowded sea route is between China and the US, which is also quite unbalanced, as the amount of goods travelling from China to the US are four times higher than the opposite direction. Also new routes can be opened – for example Russia’s Northeast Passage is a quicker way to get to Europe from China. High-tech Ports are also having ever better services.〔http://nicolasrapp.com/wp-content/uploads/2012/04/F21CHAv2-1.jpg〕 (automated terminals etc.)
Until recently one could not really know much about how these ports and kilometer long ferries are related from a network science perspective. Luckily we can have a detailed picture about how maritime traffic works. Due to a Climatological Database〔(【引用サイトリンク】title=Cliwoc international - Home page )〕 a visualization can be seen on the 18-19th century ocean traffic. Not only the year-to-year changes – that mostly represent strong trade relations between countries like England and India – but seasonal changes can be also recognized.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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