GeoServer Cookbook

Table of Contents

GeoServer Cookbook

Credits

About the Author

Acknowledgments

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Sections

Getting ready

How to do it…

How it works…

There's more…

See also

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Working with Vectors

Introduction

Using different WFS versions in OpenLayers

How to do it…

How it works…

There's more…

Using WFS nonspatial filters

How to do it…

How it works…

Using WFS spatial filters

How to do it…

How it works…

Using WFS vendor parameters

How to do it…

How it works…

Filtering data with CQL

How to do it…

How it works…

Filtering data with CQL spatial operators

How to do it…

How it works…

Creating a SQL view

How to do it…

How it works…

There's more…

Creating a parametric view

How to do it…

How it works…

Improving performance with pregeneralized features

How to do it…

How it works…

2. Working with Rasters

Introduction

Getting coverages in different formats

How to do it…

How it works…

Using WCS vendor parameters

How to do it…

How it works…

Publishing a mosaic

Getting ready

How to do it...

How it works…

Using pyramids

How to do it…

How it works…

Adding GDAL formats

Getting ready

How to do it…

How it works...

Adding a PostGIS raster data source

How to do it…

How it works…

3. Advanced Styling

Introduction

Installing the CSS module

How to do it…

How it works…

Creating a simple polygon style with CSS

How to do it…

How it works…

Adding filters to your style

How to do it…

How it works…

Adding labels with CSS

How to do it…

How it works…

Creating scale-dependent rules

How to do it…

How it works…

Rendering transformations for raster data

How to do it…

How it works…

Creating a dot density chart

How to do it…

How it works…

4. Geoprocessing

Introduction

Installing the WPS module

How to do it…

How it works…

Using the WPS process builder

How to do it…

How it works…

Chaining process – selecting features contained in a polygon

How to do it…

How it works…

Chaining process – building your own task

How to do it…

How it works…

There is more…

5. Advanced Configurations

Introduction

Upgrading GeoServer

How to do it…

How it works…

See also

Creating a script for automatic startup

How to do it…

How it works…

Optimizing Java

How to do it…

How it works…

Setting up a JNDI connection pool

How to do it…

How it works…

Working with CRS

How to do it…

How it works…

See also

Using the reprojection console

How to do it…

How it works…

Overriding an official EPSG code

How to do it…

How it works…

Setting up GeoWebCache – how to make pre-rendered tiles for high availability

How to do it…

How it works…

Storing configurations in an RDBMS

How to do it…

How it works…

6. Automating GeoServer Configurations

Introduction

Managing workspaces with REST

Getting ready

How to do it…

How it works…

There's more…

Creating and editing data stores with REST

How to do it…

How it works…

There's more…

Managing layers with REST

How to do it…

How it works…

There's more…

Uploading and updating styles with REST

How to do it…

How it works…

Managing layers with the GWC REST API

How to do it …

How it works …

Managing cache tiles with the GWC REST API

How to do it…

How it works…

7. Advanced Visualizations

Introduction

Adding time to WMS maps

Getting ready

How to do it…

How it works…

Using the WMS animator

How to do it…

How it works…

There's more…

Keyhole Markup Language styling

Getting ready

How to do it…

How it works…

There's more…

Using z-order creatively

How to do it…

How it works…

Using transparency creatively

Getting ready

How to do it…

How it works…

Using symbology encoding

How to do it…

How it works…

8. Monitoring and Tuning

Introduction

Installing the control flow module

How to do it…

How it works…

Setting a per-user limit

How to do it…

How it works…

Setting a per-request limit

Getting ready

How to do it…

How it works…

Installing the monitoring extension

Getting ready

How to do it…

How it works…

Configuring the monitoring extension

Getting ready

How to do it…

How it works…

Creating reports from the monitoring database

How to do it…

How it works…

There's more…

Limiting the GeoWebCache disk use

How to do it…

How it works…

A. OGC for ESRI Professionals

Introduction

ArcGIS versus GeoServer

Understanding standards

WMS versus the mapping service

WFS versus feature access

Publishing raster data with WCS

Index

GeoServer Cookbook

GeoServer Cookbook

Copyright © 2014 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: November 2014

Production reference: 1201114

Published by Packt Publishing Ltd.

Livery Place

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Birmingham B3 2PB, UK.

ISBN 978-1-78328-961-5

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Credits

Author

Stefano Iacovella

Reviewers

Dan Blundell

Daniela Cristiana Docan

Antonio Santiago

Commissioning Editor

Usha Iyer

Acquisition Editor

Subho Gupta

Content Development Editor

Vaibhav Pawar

Technical Editor

Pooja Nair

Copy Editors

Roshni Banerjee

Adithi Shetty

Project Coordinator

Kranti Berde

Proofreaders

Simran Bhogal

Ameesha Green

Paul Hindle

Indexers

Mariammal Chettiyar

Tejal Soni

Production Coordinators

Kyle Albuquerque

Arvindkumar Gupta

Cover Work

Arvindkumar Gupta

About the Author

Stefano Iacovella is a long-time GIS developer and consultant living in Rome, Italy. He also works as a GIS instructor.

He has a PhD in Geology. Being a very curious person, he developed a deep knowledge of IT technologies, mainly focusing on GIS software and related standards.

Starting his career as an ESRI employee, he was exposed to and became confident in proprietary GIS software, mainly the ESRI suite of products.

In the last 14 years, he has been involved with open source software, integrating it with proprietary software. He loves the open source approach, and really trusts in collaboration and sharing knowledge. He strongly believes in the open source idea and constantly manages to spread it, not only in the GIS sector but also in others.

He has been using GeoServer since the release of Version 1.5, configuring, deploying, and hacking it in several projects. Some of the other GFOSS projects he mainly uses and likes are GDAL/OGR, PostGIS, QGIS, and OpenLayers.

Prior to this cookbook, Stefano worked on GeoServer Beginner's Guide, which covers the basics of GeoServer.

When not playing with maps and geometric shapes, he loves reading about science (mainly physics and math), riding his bike, and having fun with his wife and two daughters, Alice and Luisa. You can contact him at <[email protected]> or follow him on Twitter at @iacovellas.

Acknowledgments

I would like to thank all those people who helped me make this book a real thing.

A special mention for GeoServer's developers; they are the wonderful engine without which this software, and hence, this book too, would not exist.

I would like to thank all the people at Packt Publishing who worked on this book. They helped me a lot and were very patient and encouraging when I had difficulties meeting deadlines.

A special thanks to my technical reviewers; they constantly checked for my errors and omissions. This book has become better thanks to all their hard work.

Last but not least, I want to express my gratitude to Alessandra, Alice, and Luisa for their support and patience when I was working on this book.

About the Reviewers

Dan Blundell is a designer and developer with over 10 years of experience. He has worked in both the public and private sector, from the government to creative agencies. With clients ranging from district authorities and local businesses to international brands, Dan not only has a breadth of experience, but also a reputation for delivery. Today, he is working towards making the government more open, creative, and collaborative.

Daniela Cristiana Docan is a survey engineer. She works as a lecturer for the Faculty of Geodesy, Technical University of Civil Engineering Bucharest, Romania.

Formerly, she worked for ESRI Romania and ANCPI (National Agency for Cadastre and Land Registration).

While working for ESRI Romania, Daniela trained teams from different private or state companies as an authorized instructor in ArcGIS by Environmental Systems Research Institute, Inc., USA.

In 2009, she created the logical and physical data model of the National Topographic Dataset for ANCPI on a large scale (TOPRO5). She was also a member of different workgroups that elaborated on technical specifications and country reports for INSPIRE (Infrastructure for Spatial Information in the European Community) in 2010.

Antonio Santiago is a Computer Science graduate with more than 10 years of experience in designing and implementing systems.

Since the beginning of his professional life, his experience has always been related to the world of meteorology, working for different companies dealing with meteorology as an employee or a freelance programmer. He has experience in developing systems to collect, store, transform, analyze, and visualize data. He is interested in and actively pursues any GIS-related technology, with preference for data visualization.

As a restless person, which is what one mainly experiences while working in the Java ecosystem, he has also been actively involved with many web-related technologies, always looking to improve the client side of web applications.

As a firm believer of software engineering practices, he is an enthusiast of Agile methodologies involving customers as the main key for a project's success.

Antonio is also the author of OpenLayers Cookbook, Packt Publishing.

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Preface

Until a decade ago, spatial data and the art of map building were considered tricky and complex—almost reserved for highly skilled and specialized professionals.

The advent of web mapping has changed the way geography is perceived by people. This has been largely powered by a few types of open source software that made it possible for everyone to collect, manage, and publish spatial data on the Internet.

GeoServer is one of these precious gems. Along with open JavaScript frameworks such as OpenLayers and Leaflet, it gives everyone the tools they need to create a powerful map server and lightweight applications that run in modern browsers. This allows users to show data visualizations, create online data editors, and do much more.

GeoServer is a complete and powerful type of server software that can publish data to a web mapping application. In recent releases, support for geoprocessing operations has been added, which lets you use GeoServer as a data processor.

Since the beginning, GeoServer has support to standards from Open Geospatial Consortium (OGC), which is kept compatible with its recent most relevant releases (for more information on OGC, have a look at http://www.opengeospatial.org).

This book will guide you through the details of configuring data for publication, creating geoprocessing tasks, and optimizing your server for optimal performance.

What this book covers

Chapter 1, Working with Vectors, discusses vector data publication with WFS. It covers how to use the data with a JavaScript client. It also explores how to use parametric SQL views and how to enhance performance with feature generalization.

Chapter 2, Working with Rasters, explores the different raster data types you can publish with GeoServer. It also covers the mosaic data creation and adding support for more formats that integrates GDAL libraries in your server.

Chapter 3, Advanced Styling, deals with the art of representing data on a map. Using the CSS module, you will explore how to create symbols for vector data and how to build a renderer for raster data.

Chapter 4, Geoprocessing, teaches you how to create data processing tasks on GeoServer. By following the recipes, you'll understand how you can use GeoServer to create complex server-side functions and use them in your client.

Chapter 5, Advanced Configurations, deals with some advanced configuration tasks. You'll explore database connection optimization, configuring the cache to improve performance, and Spatial Reference System (SRS) optimization.

Chapter 6, Automating GeoServer Configurations, explores the GeoServer REST interface. Using the operation published in that interface, you will discover how to create automatic tasks to update your site's configuration.

Chapter 7, Advanced Visualizations, focuses on some visualization techniques. You will explore how to add time support in WMS, create animated maps, and export data to Google Earth.

Chapter 8, Monitoring and Tuning, teaches you the use of the control flow and how to monitor extensions for GeoServer. With the tools provided, you can control how the requests are filtered and queued to your server. You will learn how to save information about users' requests and analyze them to build reports.

Appendix, OGC for ESRI Professionals, discusses a brief comparison between GeoServer and ArcGIS for Server, a map server created by ESRI. The importance of adopting OGC standards when building a geographical information system is stressed. You will learn how OGC standards lets you create a system where different pieces of software cooperate with each other.

What you need for this book

You will need a working instance of the following types of software:

Tomcat

GeoServer

PostGIS

The recipes work both with Linux and Windows operating systems, so you may select the one you prefer.

All the software used in this book is freely available, mostly as open source projects. Hardware requirements for development purposes are not very high. A relatively modern laptop or desktop will be enough to run the examples. Source code and data used in this book are freely available on the Packt Publishing site.

Who this book is for

If you are a developer or an analyst familiar with GIS, WMS, WFS, and spatial data, and you wish to get the most out of GeoServer, then this book is for you.

You can use it as a desktop quick reference guide to solve the common issues you find in your day-to-day job.

Sections

In this book, you will find several headings that appear frequently (Getting ready, How to do it…, How it works…, There's more…, and See also).

To give you clear instructions on how to complete a recipe, we use these sections:

Getting ready

This section tells you what to expect in the recipe, and describes how to set up any type of software or any preliminary settings required for the recipe.

How to do it…

This section contains the steps required to follow the recipe.

How it works…

This section usually consists of a detailed explanation of what happened in the previous section.

There's more…

This section consists of additional information about the recipe in order to make the reader more knowledgeable about the recipe.

See also

This section provides helpful links to other useful information for the recipe.

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: Save the file in a folder published on your server, such as TOMCAT_HOME/webapps/ROOT, and point your browser to it.

A block of code is set as follows: