1. Lect 2 - Electronic Atlases Electronic Atlases Continuum E. Atlas--------Thematic Mapper--CAC----------GIS

2. Lect 2 - Electronic Atlases Electronic Atlas Map on the web, disk, CD,... Static -- what you see is what you get Descriptive Data Storage Limited Goals/Limited Uses in mind May have unexpected/unused information

3. Lect 2 - Electronic Atlases E. Atlas As Display –constructed with limited goals As Storage –medium for organizing & archieving –difficult to extract raw data

4. Lect 2 - Electronic Atlases Thematic Mapper/CAC Dynamic mapping system within highly structured constraints One or more sets of data (attributes) One or more sets of spatial objects(entities) –points, lines, polygons Apply data to objects

5. Lect 2 - Electronic Atlases Thematic Mapper Display -- semi-dynamic, able to create numerous maps –50 states as entities –census data like income, age, ethinicity as attributes –number of maps limited to number of attributes

6. Lect 2 - Electronic Atlases Thematic Mapper Storage -- attribute data linked to entities –given data easily manipulated for display High end systems (CAC -- Computer Aided Cartography) –Allow importation of additional data –Allow limited logical and mathematical functions

7. Lect 2 - Electronic Atlases GIS Fully Dynamic –Describes, Predicts, Prescribes Display –Up to the user –Up to the minute Storage –Ideal location to store, edit, organize, & manage large data sets