Answer:
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If affected American Trade in the west because it prevented the travel through Louisiana, which resulted in less trade, thus an economic defect.
A political map focuses on boundaries between entities, like countries, states or counties. Thematic maps are data maps of a specific subject or for a specific purpose. Statistical thematic maps include a variety of different map types such as choropleth or shaded maps, dot maps, proportional symbol maps, and isarithmic maps.
You can refer to the attachment!
It's from my book that I use online.