geog471-671_introGIS - Introduction to GIS Longley et al....

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    Introduction to GIS Longley et al. (2001), GISystems and Science , Ch 1
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    Opening Definitions Data – numbers, text, symbols Sea surface temperature, soil type, population density Information differentiated from data implying some degree of selection, organization, and preparation for particular purpose, or data given some degree of interpretation Geographic Information (map, digital form) Information about places on Earth’s surface Geographic versus spatial Geographic refers to Earth’s surface and near surface Spatial refers to any space (more general) Knowledge about where something is Knowledge about what is at a given location Can be very detailed or very course Can be relatively static or change rapidly Can be very sparse or voluminous
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    Information Systems Help us to manage what we know Make it easy to organize and store, access and retrieve, manipulate and synthesize, and apply solution of problems Examples of Information Systems
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    Geographic Information Technologies Technologies for collecting and dealing with geographic information Global Positioning System (GPS) Remote Sensing Geographic Information System (GIS)
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    What is GIS? GIS stands for Geographic Information Systems Special kind of “information system” Uses special information about what is where on the Earth’s surface
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    What does a GIS look like? How would I know one if I saw one?
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geog471-671_introGIS - Introduction to GIS Longley et al....

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