Abstract
Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications. Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications. Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications. Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications. Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications. Even though Geographic Information Systems GIS have been available for over 20 years, they have only recently become accessible to geographers and others as a useful tool in spacial analysis. This is a sampling of basic principles of GIS, as well as applications.

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