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The use of geospatial technologies has become ubiquitous since the
leading Internet vendors delivered a number of popular map
websites. This book covers a wide spectrum of techniques, model
methodologies and theories on development and applications of GIS
relative to the internet. It includes coverage of business process
services, and integration of GIS into global enterprise information
systems and service architectures. The world's experts in this
emerging field present examples and case studies for location-based
services, coastal restoration, urban planning, battlefield
planning, rehearsal environmental analysis and assessment.
Tile-based mapping systems have grown to become the dominant form
of mapping system with the rise of Web-based mapping tools. The
origin of this book is a desire to collect all our discoveries,
techniques, and best practices for creating a til- mapping system
into one combined volume. The intent of this text is to provide a
comprehensive guide to the theory behind creating a tiled-map
system as well as a practical guide to create a concrete
implementation. Stennis Space Center, MS John Sample May 2010 Elias
Ioup vii Acknowledgements The authors would like to thank the Naval
Research Laboratory's Base Program, program element number
0602435N, for sponsoring this research. Additionally, the following
people provided technical assistance without which this book would
not have been possible: Perry Beason, Frank McCreedy, Norm
Schoenhardt, Brett Hode, Bruce Lin, Annie Holladay, Juliette Ioup,
and Hillary Mesick. ix Contents 1 Introduction . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 1 1. 1 Background of Web-Based Mapping Applications .
. . . . . . . . . . . . . . 1 1. 2 Properties of tile-based mapping
systems . . . . . . . . . . . . . . . . . . . . . . . 2 1. 3 Book
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 2 2 Logical Tile Schemes . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . 5 2. 1 Introduction . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 2 Global
Logical Tile Scheme . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 7 2. 3 Blue Marble Example . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 4
Mercator-Based Schema . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 11 2. 5 Variable Start Tile Schemes . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2. 6 Standardized Schema . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 15 References . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 15 3 Tiled Mapping Clients . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3. 1 Tile Calculation . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 17 3. 1. 1 Discrete Map
Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 18 3. 1. 2 Continuous Map Scales . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 20 3. 2 Tile Retrieval . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 22 3. 2. 1 Local Tile Storage . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Tile-based mapping systems have grown to become the dominant form
of mapping system with the rise of Web-based mapping tools. The
origin of this book is a desire to collect all our discoveries,
techniques, and best practices for creating a til- mapping system
into one combined volume. The intent of this text is to provide a
comprehensive guide to the theory behind creating a tiled-map
system as well as a practical guide to create a concrete
implementation. Stennis Space Center, MS John Sample May 2010 Elias
Ioup vii Acknowledgements The authors would like to thank the Naval
Research Laboratory's Base Program, program element number
0602435N, for sponsoring this research. Additionally, the following
people provided technical assistance without which this book would
not have been possible: Perry Beason, Frank McCreedy, Norm
Schoenhardt, Brett Hode, Bruce Lin, Annie Holladay, Juliette Ioup,
and Hillary Mesick. ix Contents 1 Introduction . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . 1 1. 1 Background of Web-Based Mapping Applications .
. . . . . . . . . . . . . . 1 1. 2 Properties of tile-based mapping
systems . . . . . . . . . . . . . . . . . . . . . . . 2 1. 3 Book
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 2 2 Logical Tile Schemes . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . 5 2. 1 Introduction . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 2 Global
Logical Tile Scheme . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 7 2. 3 Blue Marble Example . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. 4
Mercator-Based Schema . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 11 2. 5 Variable Start Tile Schemes . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2. 6 Standardized Schema . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 15 References . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 15 3 Tiled Mapping Clients . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3. 1 Tile Calculation . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 17 3. 1. 1 Discrete Map
Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 18 3. 1. 2 Continuous Map Scales . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 20 3. 2 Tile Retrieval . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 22 3. 2. 1 Local Tile Storage . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
The use of geospatial technologies has become ubiquitous since
the leading Internet vendors delivered a number of popular map
websites. This book covers a wide spectrum of techniques, model
methodologies and theories on development and applications of GIS
relative to the internet. It includes coverage of business process
services, and integration of GIS into global enterprise information
systems and service architectures. The world's experts in this
emerging field present examples and case studies for location-based
services, coastal restoration, urban planning, battlefield
planning, rehearsal environmental analysis and assessment.
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