Book Image

OpenLayers 3: Beginner's Guide

By : Thomas Gratier, Paul Spencer, Erik Hazzard
Book Image

OpenLayers 3: Beginner's Guide

By: Thomas Gratier, Paul Spencer, Erik Hazzard

Overview of this book

<p>This book is a practical, hands-on guide that provides you with all the information you need to get started with mapping using the OpenLayers 3 library.</p> <p>The book starts off by showing you how to create a simple map. Through the course of the book, we will review each component needed to make a map in OpenLayers 3, and you will end up with a full-fledged web map application. You will learn the key role of each OpenLayers 3 component in making a map, and important mapping principles such as projections and layers. You will create your own data files and connect to backend servers for mapping. A key part of this book will also be dedicated to building a mapping application for mobile devices and its specific components.</p>
Table of Contents (22 chapters)
OpenLayers 3 Beginner's Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Multiple styles


Remember, from the beginning of the chapter, that we said there were three different ways of specifying styles:

  • An instance of ol.style.Style

  • An array of ol.style.Style instances

  • A style function

We've looked at the first, using ol.style.Style, in detail. The second, an array of styles, is really not much different from the first, that is, you are still dealing with the basic styles. The difference is that when you provide an array of styles, features are rendered once for each style. This means each feature is rendered more than once, which can provide some interesting effects. An example is probably the best way of illustrating this.