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| Introduction | |
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| Background of Web-Based Mapping Applications | |
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| Properties of tile-based mapping systems | |
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| Book Organization | |
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| Logical Tile Schemes | |
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| Introduction | |
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| Global Logical Tile Scheme | |
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| Blue Marble Example | |
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| Mercator-Based Schema | |
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| Variable Start Tile Schemes | |
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| Standardized Schema | |
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| References | |
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| Tiled Mapping Clients | |
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| Tile Calculation | |
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| Discrete Map Scales | |
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| Continuous Map Scales | |
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| Tile Retrieval | |
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| Local Tile Storage | |
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| Network Tile Retrieval | |
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| Generating the Map View | |
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| Discrete Scales Map View | |
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| Continuous Scales Map View | |
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| Example Client | |
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| Survey of Tile Map Clients | |
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| Image Processing and Manipulation | |
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| Basic Image Concepts | |
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| Geospatial Images | |
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| Specialized File Formats | |
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| Image Manipulation | |
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| Interpolation 1: Nearest Neighbor | |
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| Interpolation 2: Bilinear | |
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| Interpolation 3: Bicubic | |
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| Choosing Image Formats for Tiles | |
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| Choosing Tile Sizes | |
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| Tuning Image Compression | |
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| References | |
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| Image Tile Creation | |
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| Tile Creation from Random Images | |
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| Tile Creation Preliminaries | |
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| Bottom-Up Tile Creation | |
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| Choosing the Base Level for a Set of Source Images | |
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| Pull-Based Versus Push-Based Tile Creation | |
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| Tile Creation Algorithms | |
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| Scaling Process for Lower Resolution Levels | |
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| Optimization of Tile Creation | |
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| Caching Tile Sets in Memory to Improve Performance | |
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| Partial Reading of Source Images | |
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| Reading Random Areas from Source Images | |
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| Tile Creation with Partial Source Image Reading | |
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| Tile Creation with Parallel Computing | |
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| Multi-Threading of Tile Creation Algorithms | |
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| Tile Creation for Distributed Computing | |
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| Partial Updating of Existing Tiled Image Sets | |
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| References | |
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| Tile Storage | |
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| Introduction to Tile Storage | |
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| Storing Image Tiles as Separate Files | |
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| Database-Based Tile Storage | |
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| Custom File Formats | |
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| Comparative Performance | |
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| Writing Tests | |
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| Reading Tests | |
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| Storage of Tile Metadata | |
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| Storage of Tiles in Multi-Resolution Image Formats | |
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| Memory-Cached Tile Storage | |
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| Online Tile Storage | |
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| Practical Tile Storage | |
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| Introduction to Tile Indexes | |
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| Storage by Zoom Level | |
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| Introduction to Tile Clusters | |
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| Tile Cluster Files | |
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| Multiple Levels of Clusters | |
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| Practical Implementation of Tile Clusters | |
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| Application to Memory Cached Tiles | |
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| Application to Distributed Computing | |
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| Performance Optimizations of Tile Cluster Method | |
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| Tile Serving | |
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| Basics of HTTP | |
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| Basic Tile Serving | |
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| Tile Serving Scheme with Encoded Parameters | |
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| Tile Serving Scheme with Encoded Paths | |
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| Service Metadata Alternatives | |
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| Conclusions | |
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| References | |
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| Map Projections | |
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| Introduction to Datums, Coordinate Systems, and Projections | |
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| The Shape of the Earth | |
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| Datums | |
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| Coordinate Systems | |
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| Map Projections | |
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| Different Map Projections | |
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| Cylindrical Equidistant Projection | |
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| Cylindrical Equal-Area Projection | |
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| Mercator | |
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| Universal Transverse Mercator | |
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| Point Reprojection | |
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| Map Reprojection | |
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| Affine Transforms | |
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| Interpolation | |
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| Point-wise Reprojection | |
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| Tablular Point-Wise Reprojection | |
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| Map Projections for Tiled Imagery | |
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| Storing Tiles in the Geodetic Projection | |
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| Storing Tiles in the Mercator Projection | |
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| Other Projections | |
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| Which Projection for a Tiled-Mapping System? | |
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| Conclusion | |
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| References | |
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| Tile Creation using Vector Data | |
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| Vector Data | |
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| Tile Creation | |
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| Queries | |
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| Storage | |
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| Database Storage | |
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| File System Storage | |
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| Case Study: Tiles from Blue Marble Imagery | |
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| Pull-Based Tiling | |
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| Push-Based Tiling | |
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| Results | |
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| Case Study: Supporting Multiple Tile Clients | |
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| KML Server | |
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| Static KML Example | |
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| Dynamic KML Example | |
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| WMS Server | |
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| WMS Servlet Implementation | |
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| References | |
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| Index | |