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2- Introduction to GIS & GIS data.pdf - CHAPTER 28...

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CHAPTER 28INTRODUCTION TO GISCE 240 Geomatics01/20/2022Shibasish Dutta Roy ([email protected])1
What You Will LearnDefine GISBackground of GISClarify GIS ConceptIdentify GIS main components and functionsGIS Data SourcesDistinguishing GIS and LIS2
What is a GIS?Geographic Information Systems (GIS)Key to all definitions of a GIS are:(what is where and when)3“Spatial Analysis”Not just a Software
Let’s see an example…4The most photographed places in the world.
GIS Is ….A system of integrated computer-based toolsfor end-to-endprocessing(capture, storage, retrieval, analysis, display)of data usinglocation onthe earth’s surfacefor interrelationin support ofoperationsmanagement, decision making, and science.set of integrated tools for spatial analysisencompasses end-to-end processing of datacapture, storage, retrieval, analysis/modification, displayuses explicit location on earth’s surface to relate dataaimed at decision support, as well ason-going operations and scientific inquiry5Source: Dr. Ronald Briggs
GIS: Background6LOUIS-ALEXANDRE BERTHIER(17531815)French CartographerTroop movement during American revolutionMap sampleCreated: 1781Location: Baltimore Region (MD)Scale: 1:26,400.Manuscript, pen-and-ink and watercolor.“map overlay”
7DR. JOHN SNOW(18131858)Father of modern epidemiologyMap sampleIn the 1850s, cholera was poorly understood andmassive outbreaksAn outbreak in London in 1854His concept: cholera was transmitted through thedrinking of polluted water (wells), rather thanthrough the air, as was commonly believed.Source: GIS: Background
Why Study GIS?880% oflocal government activities estimated to be geographically basedplats, zoning, public works (streets, water supply, sewers), garbage collection, land ownership andvaluation, public safety (fire and police)A significant portion of state government has a geographical componentnatural resource managementhighways and transportationBusinesses use GIS for a very wide array of applicationsretail site selection & customer analysislogistics: vehicle tracking & routingnatural resource exploration (petroleum, etc.)precision agriculturecivil engineering and construction

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Term
Spring
Professor
Goldsby,PhilipA
Tags
Geographic information system

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