Geographic Information System - ArcView University at Buffalo Summer Institute 2003 May 12, 2003.
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Geographic Information System - ArcView University at Buffalo Summer Institute 2003 May 12, 2003
Course Overview You will learn - how to make a thematic map - how to query a map and table - how to join a table to a map - how to analyze spatial relationships - how to present the result - how to create geographic data
Introduction to GIS ArcView_module_1 May 12, 9:00 AM
Outline What is GIS? What can GIS do? GIS applications What ’ s special about GIS? How it works (term definition)
Definition An information system that is designed to work with geographically referenced data What is GIS?
Layers GIS organizes the information about place by layers What is GIS?
Layers Modeling the phenomenon … Group of spatial objects with related entity type Digital Representation of Spatial Entities Phenomenon of interest in the real world Layers Spatial Objects Spatial Entities e.g. point, line, polygon e.g. city layer, SARS layer, Tornado layer e.g. urban growth, Tornado movement SARS spread, crime, consumer behavior Abstraction What is GIS?
Link bet/w map and attribute In GIS, spatial objects are linked to attributes Representing in computer… What is GIS?
Multidisciplinary Science Geography Mathematics Remote Sensing Cartography Surveying Statistics Computer Science Geodesy Operations Research What is GIS?
Spatial Component Estimates are that 80% of all data has a spatial component. Data from most sciences can be analyzed “ spatially ”. What can GIS do?
ArcView GIS ArcView GIS lets you create map displays and maps for presentation simply by pointing and clicking. ArcView GIS lets you visualize and analyze information in new ways, revealing previously hidden relationships, patterns, and trends. What can GIS do?
“ The application of GIS is only limited by the imagination of those who use it. ” Archaeology, agriculture, banking, defense and intelligence, electric and gas, engineering- pipeline, engineering- surveying, federal government, fire/EMS/disaster/homeland security, forestry, health and human services, insurance, education, landscape architecture, law enforcement and criminal justice, libraries and museums, location service, marine/cost/oceans, media, mining/earth science, natural resources, petroleum, real estate, retail business, state and local government, telecommunications, transportation, universities, and water/wasterwater GIS applications
Integration Most problems exist in a geographic context. GIS puts various themes together. What’s special about GIS?
Visualization Maps are worth a thousand words What’s special about GIS?
Map features The objects represented on maps Each map feature has a location, a representative feature type, and a symbol that represents one or more of its characteristics. How GIS works?Term definition for ArcView users
Feature types Points (e.g. Schools, train stations, fire stations, and buildings in small scale) Lines (e.g. Highways, railroads, bridges, and creeks) Polygons (e.g. Parks, lake, and buildings in large scale) How GIS works?Term definition for ArcView users
Attributes Information about map features Stored as Tables Fields (column) Records (row) Term definition for ArcView users How GIS works?
Themes In ArcView, the layers are called themes A set of related map features that are linked to attributes (e.g. roads, parcels, wildlife habitat) Term definition for ArcView users How GIS works?
GIS Database All the themes for a geographic area taken together often called spatial database Term definition for ArcView users How GIS works?