Getting Started with GEO, CouchDB, and Node.js

✍ Scribed by Mick Thompson

• Publisher: O'Reilly Media
• Year: 2011
• Tongue: English
• Leaves: 66
• Category: Library

✦ Synopsis

Today's mobile devices have GPS and standard APIs to give you access to coordinates—but what can you do with that data? With this concise book, application developers learn how to work with location data quickly and easily, using Node.js, CouchDB, and other open source tools and libraries. Node.js makes it simple to run event code on the Web, and the CouchDB document-oriented database lets you store location data and perform complex queries on it quickly. You'll learn how to get started with these tools, and then use them together to build an example project called MapChat, using HTML and JavaScript code samples.Learn how to serve dynamic content with Node.js, and use its asynchronous IO to handle several requests at once Become familiar with GeoJSON, Geohash, and the Geospatial Data Abstraction Library (GDAL) for working with spatial data Build geospatial indexes using the GeoCouch branch of CouchDB Combine these tools to build a project that lets users post real-time chat messages tagged with their current map location

✦ Table of Contents

Table of Contents......Page 9
Conventions Used in This Book......Page 11
Safari® Books Online......Page 12
How to Contact Us......Page 13
Getting Started with Node.js......Page 15
Asynchronous Callbacks......Page 16
Routes......Page 18
Static Files......Page 19
Geo Datasets......Page 21
Example Geometries......Page 22
Grab Some Data......Page 23
Ogrinfo......Page 24
Geohash......Page 25
Replication......Page 29
Creating a Database......Page 30
Creating a View......Page 31
View Options......Page 33
Using Reduce......Page 34
Using CouchApps…For Fun and Profit......Page 35
Load Shared Code......Page 36
GeoCouch......Page 38
Using Cradle to Talk to Geocouch......Page 39
Add the Couchapp......Page 40
Bounding Box Queries......Page 41
Displaying the Data Using Node.js......Page 42
CouchDB Hosting Options......Page 45
Socket.io......Page 47
Setting Up the Project......Page 48
Making chat subscriptions......Page 50
Handling Chat Messages......Page 51
Using Google Maps......Page 52
Center and Bounds......Page 53
Custom Overlays......Page 54
Chat Messages from CouchDB......Page 57
Using a List Function......Page 59
Notify Clients of Cluster Updates......Page 60
Display List of Clusters in the Client......Page 61

✦ Subjects

Библиотека;Компьютерная литература;NoSQL;CouchDB;