The design and implementation of geographic information systems / John E. Harmon and Steven J. Anderson.

Format:

Book

Author/Creator:

Harmon, John E.

Contributor:

Anderson, Steven J., 1964-

Language:

English

Subjects (All):

Geographic information systems.

Physical Description:

viii, 264 pages : illustrations ; 25 cm

Place of Publication:

Hoboken, N.J. : J. Wiley & Sons, [2003]

Summary:

Presents strategies for application development, interface design, and enabling Web-based access. * Includes numerous case studies and examples from the private and public sectors. * Provides information on integrating legacy MIS systems and planning for future developments in database design.

Contents:

Corporate or Enterprise Geographic Information Systems 4

The GIS Strategic Plan 9

Chapter 2 Before Design: Needs Assessment and Requirements Analysis 13

Organizational Involvement 13

Need for Education, Support, and Commitment of Management

Corporate Implementation Takes Time 15

Manage Users' Expectations

No Unrealistic Promises 16

Needs Assessment/Requirements Analysis 16

Assessing the Current Users 17

Categorizing Users 18

Other Factors with Users 20

Applications 21

Evaluating Existing Data 24

Accuracy 33

Completeness 33

Maintenance 35

Software Selection 36

Technical Environment 37

Assessing Costs and Benefits 38

Pulling the Needs Together 41

Chapter 3 Designing the GIS Database Schema 47

Elements of a Schema 47

Data Dictionary 48

Tables and Relationships 51

Metadata 60

Chapter 4 Designing Spatial Data 69

Choosing the Appropriate Mix of Data Models 69

Choosing a Subset of Reality 72

The Two Principal Data Models 73

Layers and Objects 78

Representing Geographic Features 84

Topologic Relationships 85

Types of Spatial Objects 91

Issues around the Third Dimension 98

Accuracy, Precision, and Completeness 103

Accuracy Concerns

Global Positioning Systems 107

Differential Processing 109

Accuracy across Layers 110

Choosing a Coordinate System and Map Projection 111

Decimal Longitude and Latitude or Projected Data 113

Characteristics of Map Projections 115

Spanning Existing Map Projection Zones 116

Selection of Projection for Large Areas 117

Spatial Indexing 121

Chapter 5 Design Issues for Attribute Data 127

General Principles: Fields in Both D and G Tables 129

Specific Principles for G Tables 131

Principles for Fields in D Tables 133

Designing Input Elements 137

Design of Output Elements 138

Application Design 140

Chapter 6 Remotely Sensed Data as Background Layers and Data Sources 147

Aerial Photography as Backdrop Information 148

Capture Data as Well? 155

Dealing with the Images 157

Integrating Remotely Sensed Information with GIS 161

Questions to Ask 166

Chapter 7 Implementation: Data Development and Conversion 169

System Configuration and Product Architecture Plan 169

Data Development and Conversion Plan 171

Capturing Digital Data 175

Optical Character Recognition 177

In-House or Out-Source Data Development of Conversion 178

Selecting a Vendor 178

Perform a Pilot Project 180

Chapter 8 Implementation: Selecting Hardware and Software 183

Software Considerations 183

Evaluating Software 186

How to Select Your Software 190

Hardware Concerns 193

Networking Issues 195

Types of Networks 196

The Capacity of the Network 199

Chapter 9 Designing the Organization for GIS 201

Ownership of Geographic Information 201

User Roles 202

Staffing the Design and Implementation Process 206

Where to Put the GIS 208

Designing the Data Flow 214

Chapter 10 Early Management Concerns: Interacting with the System 217

User Roles 219

Managing User Roles 224

Managing Desktop Interfaces 226

Managing World Wide Web-Based Interfaces 228

GIS Interaction and the Organization 230

A New Committee 231

Evaluation 232

Access Controls 234

Controlling Public Access 236

Managing the System

The Maintenance Plan 238

Data Dissemination 242

GIS Data Distribution through the World Wide Web 245.

Notes:

Includes bibliographical references and index.

ISBN:

0471204889

OCLC:

50590661