Geospatial Services and Applications for the Internet

by Sample, John T.; Shaw, Kevin; Tu, Shengru; Abdelguerfi, Mahdi

• ISBN13: 9780387746739
• ISBN10: 0387746730
• Format: Hardcover
• Copyright: 2008-10-01
• Publisher: Springer Verlag

Summary

The use of geospatial technologies has become ubiquitous since the leading internet vendors delivered a number of popular map websites. Today, businesses are either migrating location-specific capabilities into their information systems, or expanding existing Geospatial Information Systems (GIS) implementation into enterprise-wide solutions. As enterprise information systems evolve toward service-oriented architecture (SOA), geospatial technologies also evolve along the same lines.

Table of Contents

List of Figures	p. IX
List of Tables	p. XIII
Preface	p. XV
Hierarchical Infrastructure for Internet Mapping Services	p. 1
Introduction	p. 2
Internet Mapping Services	p. 3
Direct Server Access	p. 4
Pure Client-Server Design	p. 4
Memory-Based Caching in the Client	p. 5
Internal Spatial Data Structures	p. 6
Utilizing Auxiliary Servers	p. 8
Static Proxy	p. 8
Dynamic Proxy	p. 10
Implementation Details	p. 10
Building Combined Solutions	p. 13
Modular Design and Chaining	p. 13
Evaluation	p. 15
Comparison with Raster-Based Visualization	p. 16
Typical Usage Scenarios	p. 17
Performance Comparisons for Deployments Utilizing Auxiliary Servers	p. 25
Comparison with the Tile Method	p. 26
Conclusions and Future Research	p. 28
References	p. 29
Case Study: Geospatial Processing Services for Web-based Hydrological Applications	p. 31
Introduction	p. 31
Hydrological Models	p. 33
Overview of Available Geospatial Services and Applications for Hydrological Models	p. 33
System Architecture and Software Components of the Geoportal Application	p. 36
Geospatial processing services	p. 40
Conclusions and lessons learnt	p. 43
References	p. 46
An Application Framework for Rapid Development for Web-based GIS: GinisWeb	p. 49
Introduction	p. 50
Architecture of overall Web GIS	p. 52
Use-case model of the overall system	p. 52
Non-functional requirements	p. 53
Functions and structure of Ginis Web GIS application	p. 54
Structure of Web-enabled GIS node	p. 55
Development model of the GinisWeb framework	p. 56
GinisWeb model of a geoinformation system	p. 57
Structure and basic elements of XML language GADL	p. 63
Case study: A Web GIS for an electric power supply company	p. 68
Conclusion	p. 69
References	p. 71
Geospatial Web Services: Bridging the Gap Between OGC and Web Services	p. 73
Introduction	p. 74
Related Work	p. 74
OGC Services	p. 75
Web Services	p. 76
Interoperability	p. 77
Implementation Issues to Consider	p. 78
OGC to Web Services	p. 78
Data Handling	p. 79
Functional Mapping	p. 83
Metadata	p. 85
W3C to OGC	p. 88
Service Specific Implementations	p. 90
Driver-Based Mapping	p. 91
Conclusion	p. 91
References	p. 92
The Design, Implementation and Operation of the JPL OnEarth WMS Server	p. 95
OnEarth Design	p. 97
OnEarth WMS Server	p. 99
Pre-Tiled WMS and KML	p. 103
KML - WMS harmonization	p. 106
Image Access Layer	p. 106
Storage file format	p. 107
Virtual Image Server	p. 108
Composite image reader	p. 110
Concluding remarks	p. 110
Data Integration for Querying Geospatial Sources	p. 113
Introduction	p. 114
Data Heterogeneities	p. 115
Ontology Creation	p. 117
Ontology Alignment	p. 118
Query Processing	p. 124
User Interfaces	p. 130
Visual Ontology Alignment	p. 130
Web-based Query Interface	p. 131
Related Work	p. 132
Conclusions	p. 134
References	p. 135
Translating Vernacular Terms into Geographical Locations	p. 139
Introduction	p. 139
Background	p. 141
Geographical Gazetteers	p. 142
Related Approaches	p. 143
Statistical Text-Mining Approach	p. 145
Experimental implementation	p. 148
Text-Mining Software Framework	p. 149
Knowledge Set Persistence	p. 152
Application Integration	p. 152
Experimental results	p. 154
Concluding Remarks	p. 154
References	p. 156
Personalizing Location-Aware Applications	p. 159
Introduction	p. 160
Literature Review	p. 161
Implicit interest indicators	p. 162
User Modeling	p. 164
Personalization	p. 165
Privacy	p. 166
Approach	p. 166
Experimental Evaluation	p. 168
System Implementation	p. 170
Target Market Personalization	p. 171
Group Contexts	p. 172
Dataset Dependency	p. 173
Future Work	p. 175
References	p. 175
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