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上传时间: 2009-03-08
详细说明： Chapter 1 – Introduction Who Should Read This Book What Is a Geographic Information System? Corporate or Enterprise Geographic Information Systems The GIS Strategic Plan Chapter 2 – Before Design: Needs Assessment and Requirements Analysis Organizational Involvement Need for Education, Support, and Commitment of Management—Corporate Implementation Takes Time Manage Users’ Expectations—No Unrealistic Promises Needs Assessment/Requirements Analysis 16 Assessing the Current Users 17 Categorizing Users 18 Other Factors with Use rs 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 CONTENTS v 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 Conclusions 124 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 Contents vi Contents 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 Summary 251 ...展开收缩
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