Book Image

Mastering OpenLayers 3

By : Gábor Farkas
Book Image

Mastering OpenLayers 3

By: Gábor Farkas

Overview of this book

OpenLayers 3 allows you to create stunning web mapping and WebGIS applications. It uses modern, cutting edge browser technologies. It is written with Closure Library, enabling you to build browser-independent applications without painful debugging ceremonies, which even have some limited fallback options for older browsers. With this guide, you will be introduced to the world of advanced web mapping and WebGIS. First, you will be introduced to the advanced features and functionalities available in OpenLayers 3. Next, you will be taken through the key points of creating custom applications with OpenLayers 3. You will then learn how to create the web mapping application of yours (or your company's) dream with this open source, expense-free, yet very powerful library. We’ll also show you how to make amazing looking thematic maps and create great effects with canvas manipulation. By the end of this book, you will have a strong command of web mapping and will be well on your way to creating amazing applications using OpenLayers 3.
Table of Contents (17 chapters)
Mastering OpenLayers 3
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Rotating a view


The penultimate control that we add to our application before we consider it finished, is the rotation control in the next example: ch06_rotate. We will place it in the bottom bar along with the upcoming projection control. In the first step, we extend our HTML file with container elements for them:

            <div class="notification-bar">
                <div id="messageBar" class="message-bar"></div>
                <div id="projection"></div>
                <div id="rotation"></div>
                <div id="coordinates"></div>
            </div>

Next, we create some CSS rules for the rotation control:

.notification-bar #rotation {
    width: 10%;
    text-align: center;
}
.notification-bar #rotation input {
    text-align: center;
    outline: none;
    border: 0;
    -moz-appearance: textfield;
}

We align the control to the center of the container element and remove any border or outline from it.

Note

In Firefox...