What Do We Do InfoGrafix provides Geographic Information Systems consulting services, project management and training for ESRI’s ArcView and ArcGIS Software. With the skills and experience necessary to help customers effectively utilize GIS technology we additionally provide planning, design, and implementation of GIS solutions. InfoGrafix, L.L.C. translates project challenges and issues into cost effective predictable project outcomes. “State-of-the-Art” GIS tools and quality service oriented people make InfoGrafix the right choice for your organization.
What is GIS? • Geographic Information System Definition • What can GIS really do? • GIS Data • Spatial Data Major Elements • Major Types of GIS GEOGRAPHIC INFORMATION SYSTEMS (GIS)
Spatial Data Value Shape Location Spatial Reference Object’s data, information or description in tables Object’s external surface or outline on a map or drawing Object’s place on a map that represents the real world position Object's relationship to the objects around it
Spatial Data Value Shape Location Spatial Reference Basic geometric figures Points Line 2 or more Points Polygon 3 or more Lines
Raster GIS Data Layer Note Grid/Raster Cell Size Rich mixture of data Fuzzy boundaries
Grid GIS provides more data variations and less precise edges. Missing data easily identified. Vector GIS provides better edges and sharp changes in data, however, data is constant for entire area. Data Variation Greater Data Variation Missing Data Sharp Edges Single Value
Shape Location Spatial Reference Value Database Shape Graphics Location Coordinates Map Projection and Datum Spatial Reference Connectivity Orientation Adjacency Containment Spatial Data Summary
GIS Data Structure Shape Value Location Spatial Reference Map Projection and Datum Containment Adjacency Orientation Connectivity Database Coordinates Graphics GIS Geographic Information System