Book Image

Google Maps JavaScript API Cookbook

Book Image

Google Maps JavaScript API Cookbook

Overview of this book

Day by day, the use of location data is becoming more and more popular, and Google is one of the main game changers in this area. The Google Maps JavaScript API is one of the most functional and robust mapping APIs used among Geo developers. With Google Maps, you can build location-based apps, maps for mobile apps, visualize geospatial data, and customize your own maps.Google Maps JavaScript API Cookbook is a practical, hands-on guide that provides you with a number of clear, step-by-step recipes that will help you to unleash the capabilities of the Google Maps JavaScript API in conjunction with open source or commercial GIS servers and services through a number of practical examples of real world scenarios. This book begins by covering the essentials of including simple maps for Web and mobile, adding vector and raster layers, styling your own base maps, creating your own controls and responding to events, and including your own events.You will learn how to integrate open source or commercial GIS servers and services including ArcGIS Server, GeoServer, CartoDB, Fusion Tables, and Google Maps Engine with the Google Maps JavaScript API. You will also extend the Google Maps JavaScript API to push its capabilities to the limit with additional libraries and services including geometry, AdSense, geocoding, directions, and StreetView.This book covers everything you need to know about creating a web map or GIS applications using the Google Maps JavaScript API on multiple platforms.
Table of Contents (15 chapters)
Google Maps JavaScript API Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Adding circles/rectangles to maps


Circles and rectangles are similar to polygons in that they have stroke and fill colors, weights, and opacities. The main difference between them and polygons is in defining the geometry. As seen in the previous recipes, the PolygonOptions class has a path parameter that consists of an array of LatLng objects. On the other side, the CircleOptions class has the center and radius parameters, and the RectangleOptions class has bounds parameters for defining the geometry of the Circle and Rectangle classes respectively.

In this recipe, we will go through adding circles according to the population of cities and a rectangle to map bounding to Turkey. The result map will show the bounding box of Turkey and major cities' population in a graph.

Getting ready

In this recipe, we will use the first recipe defined in Chapter 1, Google Maps JavaScript API Basics, as a template in order to skip map creation.

You can find the source code at Chapter 3/ch03_circle_rectangle.html...