Creating Location Services for the Wireless Web: Professional Developer's Guide

Overview

Location services are emerging as one of the most important and anticipated tools of the new wireless Web. For instance, these services enable you to instantly get a map of where you are using your handheld device. Or, by pressing one key, you can retrieve the yellow pages for your location. But there is an entire system behind the convenience that delivers a user's location to the Web server. In this book, noted author Johan Hjelm covers the all-important standards that will enable location application ...
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Overview

Location services are emerging as one of the most important and anticipated tools of the new wireless Web. For instance, these services enable you to instantly get a map of where you are using your handheld device. Or, by pressing one key, you can retrieve the yellow pages for your location. But there is an entire system behind the convenience that delivers a user's location to the Web server. In this book, noted author Johan Hjelm covers the all-important standards that will enable location application development, and describes the architecture and operation of those services. Concentrating on the convergence between GPS (Global Positioning Systems) and positioning in the mobile network, the book also talks about the GIS (Geographical Information Services) standards and how to build a Web site that uses them.
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Product Details

  • ISBN-13: 9780471402619
  • Publisher: Wiley
  • Publication date: 3/14/2002
  • Series: Professional Developer's Guide Series
  • Edition description: BK&CD-ROM
  • Edition number: 1
  • Pages: 448
  • Product dimensions: 7.54 (w) x 9.39 (h) x 0.97 (d)

Table of Contents

Preface xi
Acknowledgments xv
Chapter 1 Developing Location-Dependent Services 1
So, What Are Location-Dependent Services Anyway? 3
How Do Location-based Services Fit with the Web? 5
Location-Dependent Services in Japan 9
Business Models for Location-Dependent Services 11
Chapter 2 Positioning Technologies 15
Quality of Position: Describing Accuracy 15
Positioning Technologies 16
GPS 17
Assisted GPS 25
Network-Based Positioning 26
Cell ID-Based Positioning 29
Timing Advance 30
Measuring the Effect from the Handset 32
Internet-Based Positioning 36
IP Address as Position 36
Position Based on DNS 36
Microlocation 39
Chapter 3 Position Technologies and Coordinate Systems 43
What Is Position Information? 43
Coordinate Formats 44
Lat-Lon Coordinate Systems 44
Universal Transverse Mercator Coordinates (UTM) 47
Local Reference Systems 49
Other Coordinate Systems 51
Topology 52
Geographic Shapes 53
Ellipsoid Point 54
Ellipsoid Point with Uncertainty Circle 54
Ellipsoid Point with Uncertainty Ellipse 54
Ellipsoid Point with Uncertainty Arc 55
Polygons 55
Ellipsoid Point with Altitude 56
Ellipsoid Point with Altitude and Uncertainty Ellipsoid 56
Transforming Geodetic Data 57
Time 58
Presenting Time 59
Chapter 4 APIs and Protocols 65
The Three Main APIs: an Overview 66
The Location Interoperability Forum API 67
The WAP Location Framework 77
The Parlay API 87
The Magic API 90
SMS and Cell Broadcast Applications 97
Chapter 5 The Application Server 99
Who Needs an Application Server? 100
The Application Data Flow 104
Personalization 105
Device Characterization and Content Adaption 108
Databases and Internal Interfaces 110
Using Filters in Servlets 111
Interfaces to External Services 112
Management System Interfaces 113
Content Distribution Network and Web Service Interfaces 115
Billing System Interfaces 117
Chapter 6 Providing Databases and Doing Searches 121
Position-Dependent Databases 122
Data Modeling for Location-Dependent Information 124
Data Quality in Geographical Databases 131
Spatial Processing in Database Systems 132
Catalog Interfaces (LDAP) 139
Geocoding of Information 140
Semistructured Database Searches: Kokono and Other Search Engines 143
Chapter 7 Data Formats for Geography-Related Information 147
GIS Concepts and XML Formats 148
Open GIS GML 150
Data Formats for Dynamic Objects 163
The Point-of-Interest Exchange Language (POIX) 164
Navigation Markup Language (NvML) 171
SKiCAL and iCAL 180
Geographic Markup in Metadata 204
Chapter 8 The User Interface to Location Information Services 209
Who Needs a User Interface, Anyway? 209
Designing for the Small Screen 211
Using User Interface Design Conventions 216
Navigating Information Services 219
Personalization 224
Identifying the Stakeholders 226
Usability Testing 228
Creating Help Pages 232
Handling Advertisements 233
Chapter 9 Maps as User Interfaces 239
Presenting Maps 239
Maps and Objectivity 243
Designing Maps 246
Databases, Maps, and Visualizations 252
GeoVRML 253
SVG: Vector Graphics in XML 257
Converting Databases to Maps Using XML 266
Chapter 10 Pulling It All Together: LBS-Enabling Your Web Site and Developing New Applications 269
Location-Enabling Your Web Site 269
Buying Databases and Maps 277
Building a New Application 280
Developing the Database Structures for a Position-Dependent Application 283
Scenario-Based Development 290
Transporting Data 292
Chapter 11 Location-Based Services in Terminals 295
Combined Mobile Phones and GPS Receivers 296
Benefon Esc 297
SIM Toolkit 299
Java in the Mobile Phone 303
Car Navigation and In-Car Telematics 306
Chapter 12 Privacy and Location 309
Governement and Standardization Initiatives 310
The WLIA Rules 315
The IETF Geopriv Working Group 316
W3C P3P 317
Privacy in Practice: Operators and User Profiles 317
Appendix A Who Does What in Location-Dependent Standards? 325
Appendix B XML: An Introduction 331
Appendix C WAP 2: How It Works 359
Appendix D What Is CC/PP? 365
Glossary 379
Index 413
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