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

Spatial analysis with JSTS


Now that we are kind of familiar with Turf, let's take a look at another topological library: JSTS. In this example, called ch09_jsts, we will reproduce the first two spatial operations from the previous example with JSTS. As we would like to make the least replicated code, we will use ch09_turf as the basis for this example.

JSTS Topology Suite (JSTS) is another reasonably mature topology library out there. It is the JavaScript port of the famous desktop topology application, Java Topology Suite (JTS). The most important difference between Turf and JSTS is that JSTS is more robust but less capable of implementation. It uses an internal format to handle geometries and offers some I/O capabilities. It can traditionally read from Well-Known Text (WKT), but now it can also read from GeoJSON, OpenLayers 2, and OpenLayers 3's internal geometry formats. It can also write to these formats. As JSTS can directly read and write OpenLayers 3's geometries, the overhead of converting...