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Chapter 7.docx

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GEO 106
Abednego Aryee

Chapter 7 Interaction  Defining spatial interaction  The roles of spatial interaction  The Uilman model  Distance decay and gravity models  the Break Point Model  The Huff Model  Expontents: Shaping the Curve  Theissen Polygons ……. Definig Spatial Interaction Physical flows Involve the movement of goods, people, materials, and other tangible commodities, between the different nodes of the city along transportation channels Example:  Delivery trucks or trains taking raw materials or finished products to factories or stores along roads or railways  Commuters going to and from work using roads or subways. Blue collar, white collar, pink collar  Oil or sewage flowing along pipeline  Migration of people ( and their thing and culture) from out your city or country to inside your city or neighborhood Non-physical flows Refer to the transmission of more intangible commodities such as information between nodes in the city along sometimes less visible transmission channels. Example:  Flow of electricity, telecommunications, and the internet either along telephone wires or through wireless transmission mediums  Flow of ideas that occurs within a classroom or opinions through the pages of a newspaper. As you interact with other people, this may include diffusion of ideas or new technologies.  Flow of money or ‘thought’ goods though the internet All flows:  Require some type of infrastructure.  Occur at various scales, from the individual through the neighborhood to the city, region, country and globe  Occur in various ways, ranging from tangible things moving along tangible channels to intangible things moving along intangible channels. Ex, purchase online to get a ebook, teleparty. Collectively, all of this is known as spatial interaction and should be viewed as an integral part of both your life and that of the city, essential to growth, functioning, and survival because it is a necessary link in the process of decision making . reciprocal-exchange-live & fake value, attitudes, belief, culture interaction can be better or worse The Roles of Spatial of Interaction  It permits integration of the various spatially separated parts of the city  It permits differentiation and specialization within the system (comparative advantage)  It acts to organize the system, since the magnitude and nature of the flows create and define the hierarchical levels that exist in the system. Organize system neskd hierarchies  It acts as an agent of change since it provides the means by which commodities (such as new fashions) and ideas/opinions (suchs as “we need a new government”) to move freely to all individuals within the system The Ullman Model of Spatial Interaction  Complementarity (a supply and demand relationship) much exist for interaction to take place. Need , supply.  …this will only work if there is no intervening opportunity between the points of supp
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