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IntroductionToGIS with Karl Krauter
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An organized collection of computer hardware software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information. WHAT IS A GIS ?
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G I S G eographic G eographic: location A location somewhere on, above, or below the Earth. I nformation I nformation: attributes Qualities or attributes of a geographic location. S ystem S ystem: Tools Tools used to develop, query, and display geographic information.
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Tools include: Hardware PCUNIXMAC PlottersDigitizersScanners Software Arc/InfoArcView People Training Networked with others
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Layers of geographically referenced data
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G I S is a process which looks at the relationships of layers by asking questionsquestionsquestions: Who is within a distance of... What would happen if... When was the last time... Where is a specific location of... How far from one location to another... How many occurrences of an event are within a distance of a location.
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Examples of GIS questions asked Desert Game Range What is the total area of industrial minerals ? Potential Radon Hazard Where are the potential radon hazards ? Earthquake Scenario What would happen in Reno if a 7.1 earthquake happened on the earthquake happened on the Carson Valley Fault range Carson Valley Fault range Earthquake Event How many events happened in 1976
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Hands on GIS The Question: Find all the areas of possible avalanche where south facing slopes are greater than 30%, and are within 150 meters of a major road. To find the answer to this GIS question What layers / themes are needed ? DEMs Major roads
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Hands On ArcView 3.2 Project Window View Window Table Window Charts Window Layout Window Script Window
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Announcements: ArcView is available for $250.00 for each module Call E.S.R.I. 1-888-377-4575 Ext. 1499 you will need to fax your class schedule
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G I S What is it ? It is a process which looks at the relationships layers between layers of geographic information
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G I S An organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information.
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layer A layer is a theme of various features: LAYERS Locations(points) + + + Lines(arcs) Areas(polygons) Images(raster) TIFFDEMGrids An x,y value A series of x,y locations A closed series of x,y locations
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Project overview figure
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Key Terms
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Feature Class - Points An x,y location
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Feature Class - Line A series of x,y locations
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Feature Class - Area (polygons) A series of x,y locations that are closed
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Introduction to ArcView What is it? How does it work?
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Analysis Attribute Query – Non Spatial Analysis Spatial Query –Spatial Join –Theme on Theme Within a distance Are completely within Buffer Analysis Boolean Analysis (Raster)
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Data Management Metadata Scale Why doesn’t my data fit? Projection Data Creation Why doesn’t my data fit? Metadata is data about your data.
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Data Input Various methods: Digitize Digitize Tablet On Screen digitizing Digitize in a desktop type program program Scanning Take from other source
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What is available in additional training ? University of Nevada, Reno Introduction To G I S Spring / Fall Short course in GIS Summer TMCC - Various short courses in ArcView WNCC - Intro To GIS, Fall E.S.R.I. - Various week long classes Internet classes - www.esri.com Some other locations in Canada GIS questions: krauter@unr.edu
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Recommended Books “Getting to Know ArcView GIS” by Pat Breslin, Nick Frunzi, Eileen Napoleon, and Tim Ormsby “ArcView Exercise Book”, by Pat Hohl with Brad Mayo
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What is the question ? Find all the areas of possible avalanche where south facing slopes are greater than 30%, and are within 150 meters of a major road. Do your results seem reasonable ?
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Data Manipulation Data that intersects other data Data that falls within a distance of other data Two data layers joined together to produce another data layer
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How do you want others to view your results? In ArcView -> -> -> Layouts Who is your audience ? What colors or line type presents my results best?
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