introduction to gis
DESCRIPTION
Introduction to GIS. What is GIS? GIS is an integrated system used to view and manage information about geographic places, analyze spatial relationships, and model spatial processes. All About GIS. GIS allows you to discover patterns and relationships you cannot easily see in a table - PowerPoint PPT PresentationTRANSCRIPT
Introduction to GISWhat is GIS?
GIS is an integrated system used to view and manage information about geographic places, analyze spatial relationships, and model spatial processes.
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All About GIS . . .GIS allows you to discover patterns and
relationships you cannot easily see in a table
GIS stores two types of information:
Features – Objects found on Earth
( mountains, rivers, and lakes)
Attributes – Description of Features
GE110 Fall 2010 Week 1_Thursday
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Raster Aerial Photos Satellite
Images DEM
A GIS map contains layers - a collection of graphic objects that are alikeLayers may contain features or surfacesFeatures have
shape and size location can be displayed at different sizes linked to information spatial relationships
Surfaces have a geographic expanse numeric values
Vector Points Lines Polygons
GE110 Fall 2010 Week 1_Thursday
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Output
Animation (*.avi , *.mov)
GE110 Fall 2010 Week 1_Thursday
*.emf - Enhanced Metafile*.eps - Encapsulated PostScript*.ai – Adobe Illustrator*.pdf – Portable Document Format*.svg – Scalable Vector Graphics *.bmp – Bitmap*.jpg – Joint Photographic Experts Group*.png – Portable Network Graphics *.tif – Tagged Image File Format *.gif - Graphics Interchange Format
Export
Web (*.kml , *.kmz)
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GIS Hardware
GE110 Fall 2010 Week 1_Thursday