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

The style class


The style class, ol.style.Style, contains the drawing instructions to be used when rendering a feature. There are five properties we can use when creating a style property:

Name

Type

Description

fill

ol.style.Fill

This style is used when filling polygons. To draw unfilled polygons, leave this property out or set to null.

stroke

ol.style.Stroke

This style is used when drawing lines and drawing the outline of polygons. To draw polygons without an outline, leave this property out or set to null.

image

ol.style.Image

This style is used when drawing points.

text

ol.style.Text

This style is used when drawing text.

zIndex

number

The z-index determines the order in which features are drawn. To ensure that certain features are drawn on top of other features—for instance, points on top of polygons—assign a higher zIndex value. Note that this only affects features within the same layer.

As you can see, a style is really a composite of several specific...