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PostGIS in Action, Third Edition
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PostGIS in Action, Third Edition teaches readers of all levels to write spatial queries for PostgreSQL. It first gives you a background in vector-, raster-, and topology-based GIS and then quickly moves into analyzing, viewing, and mapping data. This fully updated third edition covers key changes in PostGIS 3.0 and PostgreSQL 12, including parallelization support, partitioned tables, and new JSON functions that help in creating web mapping applications.A must-read book for novice geographers.
Table of Contents takes you straight to the bookdetailed table of contents
Part 1: Introduction to PostGIS
1 What is a spatial database?
1.1 Thinking spatially
1.2 Introducing PostGIS
1.3 Why PostGIS
1.3.1 Standards conformance
1.3.2 Built on top of PostgreSQL
1.3.3 Free—as in money
1.3.4 Alternatives to PostGIS
1.3.5 Oracle Spatial
1.3.6 Microsoft SQL Server
1.4 Installing PostGIS
1.4.1 Verifying versions of PostGIS and PostgreSQL
1.5 Spatial data types
1.5.1 Geometry type
1.5.2 Geography type
1.5.3 Raster type
1.5.4 Topology type
1.6 Hello real world
1.6.1 Digesting the problem
1.6.2 Modeling
1.6.3 Loading data
1.6.4 Writing the query
1.6.5 Viewing spatial data with OpenJump
1.7 Summary
2 Spatial data types
2.1 Type modifiers
2.2 Subtype type modifiers
2.2.1 Spatial reference identifier
2.3 Geometry
2.3.1 Points
2.4 Geography
2.4.1 Differences between geography and geometry
2.4.2 Spatial catalogs for geography
2.5 Raster
2.5.1 Properties of rasters
2.5.2 Creating rasters
2.5.3 Spatial catalog for rasters
2.6 Summary
3 Spatial reference systems
3.1 Spatial reference systems: What are they?
3.2 Geoids
3.3 Ellipsoids
3.4 Datum
3.4.1 Coordinate reference system
3.4.2 Spatial reference system essentials
3.4.3 Projections
3.5 Selecting a spatial reference system for storing data
3.5.1 Pros and cons of using EPSG:4326
3.5.2 Geography data type for EPSG:4326
3.5.3 Mapping just for presentation
3.5.4 Covering the globe when distance is a concern
3.6 Determining the spatial reference system of source data
3.6.1 Guessing at a spatial reference system
3.6.2 When the spatial reference system is missing from spatial_ref_sys table
3.7 Summary
4 Working with real data
4.1 General utilities
4.1.1 PostgreSQL built-in tools
4.1.2 Downloading files
4.1.3 Querying external data using PostgreSQL foreign data wrappers
4.2 Summary
5 Using PostGIS on the desktop
Part 2: PostGIS basic operations
6 Geometry and geography functions
6.1 Output functions
6.1.1 Well-known binary (WKB) and well-known text (WKT)
6.1.2 Keyhole Markup Language (KML)
6.1.3 Geography Markup Language (GML)
6.1.4 Geometry JavaScript Object Notation (GeoJSON)
6.1.5 Scalable Vector Graphics (SVG)
6.1.6 Mapbox Vector Tile (MVT) and Protocol Buffers
6.1.7 Tiny WKB (TWKB)
6.1.8 Extensible 3D Graphics (X3D)
6.1.9 Examples of output functions
6.1.10 Geohash
6.2 Constructor functions
6.2.1 Creating geometries from text and binary formats
6.2.2 ST_GeomFromText
6.2.3 ST_GeomFromWKB and ST_GeomFromEWKB
6.2.4 ST_GeomFromGML, ST_GeomFromGeoJSON, ST_GeomFromKML, ST_GeomFromTWKB, ST_GeomFromGeoHash
6.2.5 Creating geographies from text and binary formats
6.2.6 Using text or binary representations as function arguments
6.3 Accessor and setter functions
6.3.1 Spatial reference identifiers
6.3.2 Transforming geometry to different spatial references
6.3.3 Using transformation with the geography type
6.3.4 Geometry type functions
6.3.5 Geometry and coordinate dimensions
6.3.6 Retrieving coordinates
6.3.7 Checking geometry validity
6.3.8 Number of points that defines a geometry
6.4 Measurement functions
6.4.1 Geometry planar measurements
6.4.2 Geodetic measurements
6.5 Decomposition functions
6.5.1 Bounding box of geometries
6.5.2 Boundaries and converting polygons to linestrings
6.5.3 Centroid, Median, and Point on surface
6.5.4 Returning points defining a geometry
6.5.5 Decomposing multi-geometries and geometry collections
6.6 Composition functions
6.6.1 Making points
6.6.2 Making polygons
6.6.3 ST_MakeEnvelope
6.6.4 ST_MakePolygon
6.6.5 ST_BuildArea
6.6.6 ST_Polygonize
6.6.7 Promoting single geometries to multi-geometries
6.7 Simplification functions
6.7.1 Grid snapping and coordinate rounding
6.7.2 Simplification
6.8 Summary
7 Raster functions
7.1 Raster terminology
7.2 Raster constructors
7.2.1 Converting geometries to rasters with ST_AsRaster
7.2.2 Loading rasters with raster2pgsql
7.2.3 Constructing rasters from scratch: ST_MakeEmptyRaster and ST_AddBand
7.2.4 Setting pixels: ST_SetValue and ST_SetValues
7.2.5 Creating rasters from other rasters
7.2.6 Converting other raster formats with ST_FromGDALRaster
7.3 Raster output functions
7.3.1 ST_AsPNG, ST_AsJPEG, and ST_AsTiff
7.3.2 Output using ST_AsGDALRaster
7.3.3 Using psql to export rasters
7.4 Raster accessors and setters
7.4.1 Basic raster metadata properties
7.4.2 Pixel statistics
7.4.3 Pixel value accessors
7.4.4 Band metadata setters
7.5 Georeferencing functions
7.5.1 Metadata setters
7.5.2 Processing functions
7.6 Reclassing functions
7.7 Polygonizing functions
7.7.1 ST_ConvexHull
7.7.2 ST_Envelope
7.7.3 ST_Polygon
7.7.4 ST_MinConvexHull
7.8 Summary
8 Spatial relationships
8.1 Bounding box and geometry comparators
8.1.1 The bounding box
8.1.2 Bounding box comparators
8.2 Relating two geometries
8.2.1 Interior, exterior, and boundary of a geometry
8.2.2 Intersections
8.2.3 A house plan model
8.2.4 Contains and within
8.2.5 Covers and covered by
8.2.6 Contains properly
8.2.7 Overlapping geometries
8.2.8 Touching geometries
8.2.9 The faces of equality: geometry
8.2.10 Underpinnings of relationship functions
8.3 Summary
Part 3: Putting PostGIS to work
9 Proximity analysis
10 PostGIS TIGER geocoder
10.1 Installing the PostGIS TIGER geocoder
10.2 Loading TIGER data
10.2.1 Configuration tables
10.2.2 Loading nation and state data
10.3 Normalizing addresses
10.3.1 Using normalize_address
10.3.2 Using the PAGC address normalizer
10.4 Geocoding
10.4.1 Geocoding using address text
10.4.2 Geocoding using normalized addresses
10.4.3 Geocoding intersections
10.4.4 Batch geocoding
10.5 Reverse geocoding
10.6 Summary
11 Geometry and geography processing
12 Raster processing
13 Building and using topologies
14 Organizing spatial data
15 Query performance tuning
Part 4: Using PostGIS with other tools
16 Extending PostGIS with pgRouting and procedural languages
17 Using PostGIS in web applications
Appendixes
Appendix A: Additional resources
Appendix B: Installing, compiling, and upgrading
Appendix C: SQL primer
Appendix D: PostgreSQL features
About the Technology
Processing location and topology data requires specialized know-how. PostGIS is a free spatial database extender for PostgreSQL that delivers the features and firepower you need to take on nearly any geodata task. With it, you can easily create location-aware queries in just a few lines of SQL code and build the back end for a mapping, raster analysis, or routing application with minimal effort.About the book
PostGIS in Action, Third Edition teaches you to solve real-world geodata problems. It first gives you a background in vector-, raster-, and topology-based GIS and then quickly moves into analyzing, viewing, and mapping data. You'll learn how to optimize queries for maximum speed, simplify geometries for greater efficiency, and create custom functions for your own applications. You'll also learn how to apply your existing GIS knowledge to PostGIS and integrate with other GIS tools. Fully updated to the latest versions of PostGIS and PostgreSQL, this Third Edition covers new PostGIS features including Foreign Data Wrappers, Database as a Service, parallelization of queries, and new JSON and Vector Tiles functions that help in creating web mapping applications.What's inside
- An introduction to spatial databases
- Geometry, geography, raster, and topology spatial types, functions, and queries
- Applying PostGIS to real-world problems
- Extending PostGIS to web and desktop applications
- Updated for PostGIS 3 and PostgreSQL 12
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