9780748407927

Interoperable and Distributed Processing in Gis

by ;
  • ISBN13:

    9780748407927

  • ISBN10:

    0748407928

  • Edition: 1st
  • Format: Nonspecific Binding
  • Copyright: 1998-07-16
  • Publisher: CRC Press

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Summary

This text shows how the principles and technologies of object-oriented programming, distributed processing and internet protocols can be embraced to further the reliability and interoperability of datasets for the professional GIS market. The book describes the central concept of the interface specification between the data consumer and producer - the Virtual Data Set (VDS). It then examines how VDS deals with two other classes of model - field representations and modelling uncertainty. The final part of the book looks at implementation, describing how the VDS interacts with PostScript, Java, and Object-oriented modelling environments.

Table of Contents

Introduction
1(6)
Problem statement
1(2)
Background
3(2)
Road map
5(2)
I Interoperability 7(56)
Interoperability in geoprocessing
9(26)
Overview
9(1)
Data migration
10(4)
Integration and databases
14(6)
Data integration and geographical information systems
20(13)
Overview
20(1)
GIS and remote sensing
21(1)
Semantic heterogeneity
22(4)
Data quality
26(2)
Metadata
28(2)
System integration
30(1)
Environmental data management
31(2)
Review
33(2)
Virtual Data Set
35(28)
Overview
35(1)
Interoperability impediments
36(4)
Syntactical diversity
36(1)
Semantic diversity of geographic information
36(2)
Diverse information communities
38(1)
Market forces
39(1)
Approaches for improvements
40(6)
Data definition languages
40(1)
Object-oriented models
41(4)
Semantic accuracy
45(1)
Open Geodata Interoperability Specification
46(8)
Overview
46(1)
Open Geodata Model
47(4)
Services Model
51(3)
The Virtual Dataset concept
54(6)
Review
60(3)
II Essential models 63(54)
Example: field representations
65(26)
Overview
65(1)
Continuous fields
65(2)
Measurement of fields
67(7)
Current representation techniques
74(10)
Cell grids
77(1)
Polyhedral tessellation
77(3)
Simplicial complexes
80(1)
Lattice or point grids
80(1)
Irregular points
81(1)
Contour models
82(2)
Characteristics of the domain D
84(1)
Characteristics of the range
85(1)
Analysis of continuous field data
86(2)
Impediments
88(1)
Review
89(2)
Modeling uncertainties
91(26)
Introduction
91(3)
Uncertainties
94(4)
What is uncertainty?
94(1)
Basic concepts of modeling uncertainties
95(2)
Inference from uncertain propositions
97(1)
Methods for the modeling of uncertainty
98(8)
Overview
98(1)
Probability theory
98(2)
Interval methods
100(3)
Fuzzy sets
103(2)
Dempster-Shafer theory of evidence
105(1)
Assessing the uncertainty of functional expressions
106(5)
Overview
106(1)
Gaussian error propagation
107(2)
Monte Carlo methods
109(1)
Other techniques
110(1)
Digital representation
111(1)
Numbers, units and dimensions
112(3)
Review
115(2)
III mplementation 117(92)
Case studies
119(24)
Introduction
119(1)
PostScript
119(9)
Overview
119(2)
Impediments
121(4)
Document Structuring Conventions
125(2)
Independence
127(1)
Lessons learned
127(1)
Internet and World-Wide Web (WWW)
128(12)
Overview
128(1)
Interprocess communication and network-level services
129(1)
Scalability
130(4)
World-Wide Web
134(4)
Openness and standardization processes
138(1)
The future: IPv6
138(1)
Lessons learned
139(1)
Review
140(3)
Strategies
143(38)
Introduction
143(1)
Component Object Model
144(4)
Overview
144(1)
Interfaces
145(1)
Feasibility
146(2)
Common Object Request Broker Architecture
148(7)
Overview
148(2)
Interfaces
150(1)
Feasibility
150(5)
Other approaches
155(2)
Java
157(23)
Overview
157(2)
Design goals
159(2)
Main features
161(9)
Java as a distributed computing environment
170(10)
Review
180(1)
Examples
181(20)
Introduction
181(1)
Uncertainty representation
182(11)
Overview
182(1)
A Java package for uncertain values: vds. value
183(3)
Intervals
186(1)
Probability distributions
186(2)
Histograms
188(4)
Dimensioned values
192(1)
Fields
193(8)
Overview
193(2)
A simple field
195(1)
VDS and user interfaces
195(6)
Conclusion
201(8)
Retrospective view
201(4)
Prospective view
205(4)
A Java examples 209(4)
A.1 Availability
209(1)
A.2 Package contents
210(3)
A.2.1 Package vds.value
210(1)
A.2.2 Package vds.geometry
211(1)
A.2.3 Package vds.field
211(1)
A.2.4 Package vds.test
211(2)
References 213(16)
Index 229

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