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Google Maps JavaScript API Cookbook

Google Maps JavaScript API Cookbook

By : Dincer, Uraz
4.3 (8)
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Google Maps JavaScript API Cookbook

Google Maps JavaScript API Cookbook

4.3 (8)
By: Dincer, Uraz

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 (10 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Google Maps JavaScript API Basics
1. Google Maps JavaScript API Basics
Introduction
Creating a simple map in a custom DIV element
Creating a simple fullscreen map
Moving from the Web to mobile devices
Changing map properties programmatically
Changing base maps
2
2. Adding Raster Layers
2. Adding Raster Layers
Introduction
Styling of Google base maps
Using different tile sources as base maps
Adding tile overlays to maps
Adding image overlays to maps
Changing the transparency of overlays
Creating a heat map
Adding the traffic layer
Adding the transit layer
Adding the bicycling layer
Adding the weather and cloud layers
Adding the Panoramio layer
3
3. Adding Vector Layers
3. Adding Vector Layers
Introduction
Adding markers to maps
Adding popups to markers or maps
Adding lines to maps
Adding polygons to maps
Adding circles/rectangles to maps
Adding animated lines to maps
Adding KML/GeoRSS layers
Adding GeoJSON to the Google Maps JavaScript API
Adding WKT to the Google Maps JavaScript API
4
4. Working with Controls
4. Working with Controls
Introduction
Adding and removing controls
Changing the position of controls
Creating and adding a geolocation control
Creating a table of contents control for layers
Adding your own logo as a control
5
5. Understanding Google Maps JavaScript API Events
5. Understanding Google Maps JavaScript API Events
Introduction
Creating two synced maps side by side
Getting the coordinates of a mouse click
Creating a context menu on a map
Restricting the map extent
Creating a control that shows coordinates
Creating your own events
6
6. Google Maps JavaScript Libraries
6. Google Maps JavaScript Libraries
Introduction
Drawing shapes on the map
Calculating the length/area of polylines and polygons
Encoding coordinates
Searching for and showing nearby places
Finding places with the autocomplete option
Adding drag zoom to the map
Creating custom popups/infoboxes
7
7. Working with Services
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7. Working with Services
Introduction
Finding coordinates for an address
Finding addresses on a map with a click
Getting elevations on a map with a click
Creating a distance matrix for the given locations
Getting directions for the given locations
Adding Street View to your maps
8
8. Mastering the Google Maps JavaScript API through Advanced Recipes
8. Mastering the Google Maps JavaScript API through Advanced Recipes
Introduction
Adding WMS layers to maps
Adding Fusion Tables layers to maps
Adding CartoDB layers to maps
Accessing ArcGIS Server with the Google Maps JavaScript API
Accessing GeoServer with the Google Maps JavaScript API
9
Index
Index

Getting elevations on a map with a click

The Google Maps JavaScript API provides information on elevation data, returning positive values on the terrain relative to the sea surface. It also gives information on the depth of ocean floors in negative values.

Using the ElevationService object, we can get elevation information on individual locations as well as paths.

In this recipe, firstly we will show how to get an elevation data from a single point that the user selects, and then we will go over the same scenario with the paths.

Getting ready

It is a good idea to have a quick glance at the Drawing shapes on the map recipe in Chapter 6, Google Maps JavaScript Libraries, as the recipe covers every detail on how to draw a shape using the Google Maps JavaScript API.

How to do it…

You can view the elevation data of a location of your choice if you follow the given steps:

  1. Define the elevator object as global:

    var elevator;

  2. Define the popup object as global:

    var popup;

  3. Initialize the elevator and popup objects...

End of Section 5
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