Introduction to GIS fGRG360G – Summer 2002

Geographic Information System Text Computer system GIS software Brainware Infrastructure Ray Hardware Software Spatial Data People

GIS Vendors See the link on the class page Environmental Systems Research Institute is number one Intergraph is number two Many more than this link list.

Why GIS? What do you think? Ideas? Advantages over paper maps?

Geographically Referenced Data Spatial data Attribute data Coordinate system Map projection Discrete Features Continuous Features Vector model Raster model

Topology Topology vs topgraphy ArcView – shapefile, no topology Arc/Info – coverage, topology Triangulated irregular network (TIN) Region Dynamic segmentation Object-oriented

Attribute Data Georelational model Relational database Join and link Object-oriented

GIS Operations Spatial data input Attribute data management Data display Data exploration Data analysis GIS modeling

Spatial Data Input Data entry How? Buy or make Digitize Edit Raster or vector Coordinate System Projection Geometric transformation

Attribute Data Management Data entry and verification Database management Accuracy Standards

Data Display Maps Charts Tables

Data Exploration Attribute data query Spatial data query Geographic visualization

Data Analysis Vector data analysis Buffering, overlay, distance measures, map manipulation Raster data analysis Local, neighborhood, zonal, global Terrain mapping and analysis Spatial interpolation Global and local Regions-based analysis Network analysis

GIS Modeling Binary models (simple criteria fit) Index models (ranked index) Regression models (dependent vs independent variables) Process models (real world)

Questions? Don’t forget review questions. Check out the new glossary terms.