This map depicts the travels of a slave ship corralling to the weather patterns of hurricanes in the year 1898. This shows the stops and routes the slave ship had to take in order to avoid hurricanes and leave according to weather patterns. Categories of hurricane severity and mapped according to symbol and color. The pushpin symbols locate positions of the slave ship per day and the color depicts the number of slaves who died that day during the travels. The slave trade ports are marked on the map as well.
All of this information shows the movement of people across regions. This is defined as mobility. In Garreau's The Human Mosaic, mobility is described as the movement of people, ideas, practices, and technologies around space. In this map, we can see the movement of people and goods across the Atlantic Ocean.
The Atlantic Ocean acts as a permeable barrier. A permeable barrier is a barrier that allows part of the innovation wave to move through, but acts to weaken the continual spread. The Atlantic Ocean is a permeable barrier because it allows the ideas and practices of the African slaves to spread from one location to another, as well as goods like sugar. While it allows these ideas, goods, and practices to spread, it also weakens the continual spread due to the difficult travel across the Atlantic and high rate of slave deaths.
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