Getting Started with GEO, CouchDB, and Node.js

By Mick Thompson

Today's cellular units have GPS and traditional APIs to provide you entry to coordinates—but what are you able to do with that info? With this concise booklet, software builders how one can paintings with position facts quick and simply, utilizing Node.js, CouchDB, and different open resource instruments and libraries.

Node.js makes it easy to run occasion code on the internet, and the CouchDB document-oriented database enables you to shop situation information and practice advanced queries on it quick. you are going to easy methods to start with those instruments, after which use them jointly to construct an instance venture known as MapChat, utilizing HTML and JavaScript code samples.

  • Learn find out how to serve dynamic content material with Node.js, and use its asynchronous IO to deal with numerous requests at once
  • Become accustomed to GeoJSON, Geohash, and the Geospatial information Abstraction Library (GDAL) for operating with spatial data
  • Build geospatial indexes utilizing the GeoCouch department of CouchDB
  • Combine those instruments to construct a venture that we could clients submit real-time chat messages tagged with their present map location

Show description

Preview of Getting Started with GEO, CouchDB, and Node.js PDF

Best Computing books

Robot Programming : A Practical Guide to Behavior-Based Robotics

* Teaches the strategies of behavior-based programming via textual content, programming examples, and a different on-line simulator robotic * Explains tips to layout new behaviors via manipulating previous ones and adjusting programming * doesn't imagine reader familiarity with robotics or programming languages * contains a part on designing your personal behavior-based procedure from scratch

Microsoft SQL Server 2012 A Beginners Guide 5/E

Crucial Microsoft SQL Server 2012 abilities Made effortless wake up and working on Microsoft SQL Server 2012 very quickly with support from this completely revised, useful source. full of real-world examples and hands-on routines, Microsoft SQL Server 2012: A Beginner's advisor, 5th version begins via explaining primary relational database process ideas.

Java: The Complete Reference, Ninth Edition

The Definitive Java Programming advisor absolutely up to date for Java SE eight, Java: the whole Reference, 9th variation explains the right way to enhance, bring together, debug, and run Java courses. Bestselling programming writer Herb Schildt covers the complete Java language, together with its syntax, keyword phrases, and basic programming ideas, in addition to major parts of the Java API library.

Introduction to Cryptography with Coding Theory (2nd Edition)

With its conversational tone and functional concentration, this article mixes utilized and theoretical facets for a superior advent to cryptography and safety, together with the newest major developments within the box. Assumes a minimum heritage. the extent of math sophistication is similar to a direction in linear algebra.

Additional info for Getting Started with GEO, CouchDB, and Node.js

Show sample text content

15 How Does CouchDB paintings? Replication Indexes and perspectives Getting all started with CouchDB making a Database making a View View innovations utilizing decrease utilizing CouchApps…For enjoyable and revenue Load Shared Code GeoCouch 15 15 sixteen sixteen sixteen 17 19 20 21 22 24 v Importing info utilizing Cradle to speak to Geocouch Bounding field Queries showing the information utilizing Node. js CouchDB website hosting strategies 25 25 27 28 31 four. MapChat - instance venture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Realtime Chat Socket. io developing the undertaking utilizing Google Maps Getting person situation customized Overlays Chat Messages from CouchDB Clustering utilizing a listing functionality Notify consumers of Cluster Updates demonstrate record of Clusters within the patron vi | desk of Contents 33 33 34 38 39 forty forty three forty five forty five forty six forty seven Preface the place. no matter if it refers to the place you've been, the place you're, or the place you're going, the concept that of the place is critical. the place hyperlinks info to the actual international. A procuring checklist could be a very priceless selection of facts by itself, yet that facts might be much more precious with extra context. for those who map the site of the shops wanted for every merchandise at the procuring record, then you definitely can create an effective path to collect the goods at the checklist. riding instructions, site visitors info, and climate can influence the direction. All of this knowledge should be fetched in line with the positioning info further to the straightforward procuring record. position can upload a brand new filter out or layer of perception into current information. It makes all types of recent purposes attainable. some time past, utilizing situation or geographic facts intended utilizing complicated or from time to time pricey software program. Datasets should be high priced or difficult to discover. constructing utilizing open resource instruments resembling Node. js and CouchDB has lately made operating with situation facts easy and speedy. Conventions utilized in This ebook the subsequent typographical conventions are utilized in this booklet: Italic exhibits new phrases, URLs, e mail addresses, filenames, and dossier extensions. consistent width Used for software listings, in addition to inside paragraphs to consult application components akin to variable or functionality names, databases, facts forms, setting variables, statements, and key words. consistent width daring indicates instructions or different textual content that are meant to be typed actually through the consumer. consistent width italic exhibits textual content that are supposed to get replaced with user-supplied values or by means of values decided through context. vii This icon indicates a tip, advice, or basic notice. This icon exhibits a caution or warning. utilizing Code Examples This publication is right here that will help you get your activity performed. quite often, you'll use the code during this ebook on your courses and documentation. you don't need to touch us for permission except you’re reproducing a good portion of the code. for instance, writing a software that makes use of a number of chunks of code from this ebook doesn't require permission. promoting or dispensing a CD-ROM of examples from O’Reilly books does require permission. Answering a question by means of bringing up this booklet and quoting instance code doesn't require permission.

Download PDF sample

Rated 4.02 of 5 – based on 27 votes