Exploring Geographic Information Systems

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Wiley, Jan 6, 1997 - Science - 320 pages
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This exploration of geographic information and geographic information systems (GIS) expands the discussion beyond the normal input-processing-output sequence. It begins by examining the manipulations that support analytical uses of GIS, including measurement and frameworks, representations, data quality, transformation and operations, parametric mapping, simple logic and overlay, taxonomy, distance transformations and surfaces. It then moves on to discuss operations that connect the practical exercises in the book to professional applications of GIS techniques in bureaucratic, social and cultural contexts.

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Contents

RUILDING RLOCKS OF GEOGRAPHIC INFORMATION
1
The Conventional View
8
Reference Systems
17
Measurement Frameworks
23
Isolated Objects to Connected Coverages
29
Spatial Control
40
Composite Frameworks
50
Summary
56
Distance Transformations
141
Generalized Voronoi Diagrams
152
The Spatial Component
167
Data Quality Applications of Neighborhood Operations
181
A Family of Problems with
201
Transformations
207
A Taxonomy for Transformations
218
Examples of Transformations
224

Representation Models and Data Structures
62
Conversion of Existing Documents Digitizing
69
Closing the Loop
77
Summary
87
TRANSFORMATIONS AND OPERATIONS
89
Interaction of Attribute and Spatial Components
98
Overlay Integration of Disparate Sources
105
Overlay for Detecting Differences
118
Summary of Transformations
230
THE BROADER CONTEXT
233
Serving Larger Goals
252
Geographic Information in the Bureaucracy
261
Information and Culture
270
Sources and Credits
283
Copyright

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