Book Image

Building Web and Mobile ArcGIS Server Applications with JavaScript ??? Second Edition - Second Edition

By : Eric Pimpler, Mark Lewin
Book Image

Building Web and Mobile ArcGIS Server Applications with JavaScript ??? Second Edition - Second Edition

By: Eric Pimpler, Mark Lewin

Overview of this book

The ArcGIS API for JavaScript enables you to quickly build web and mobile mapping applications that include sophisticated GIS capabilities, yet are easy and intuitive for the user. Aimed at both new and experienced web developers, this practical guide gives you everything you need to get started with the API. After a brief introduction to HTML/CSS/JavaScript, you'll embed maps in a web page, add the tiled, dynamic, and streaming data layers that your users will interact with, and mark up the map with graphics. You will learn how to quickly incorporate a broad range of useful user interface elements and GIS functionality to your application with minimal effort using prebuilt widgets. As the book progresses, you will discover and use the task framework to query layers with spatial and attribute criteria, search for and identify features on the map, geocode addresses, perform network analysis and routing, and add custom geoprocessing operations. Along the way, we cover exciting new features such as the client-side geometry engine, learn how to integrate content from ArcGIS.com, and use your new skills to build mobile web mapping applications. We conclude with a look at version 4 of the ArcGIS API for JavaScript (which is being developed in parallel with version 3.x) and what it means for you as a developer.
Table of Contents (21 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Geocoding with a locator service in the ArcGIS API for JavaScript


An ArcGIS Server locator service can perform both geocoding and reverse geocoding operations. Using the ArcGIS API for JavaScript, you submit an address to the Locator task and have it return the geographic coordinates for any matched locations.

The following figure illustrates this process. An address, defined by a JSON object in JavaScript, is input as a parameter to the Locator task object. The Locator task geocodes the address and returns the results in an AddressCandidate object which can then be displayed as a point on your map. This pattern is the same as the other tasks we've seen in previous chapters where an input object (Address object) provides input parameters to the task (Locator) which submits the job to ArcGIS Server. A result object (AddressCandidate) is then returned to a callback function for processing:

Input parameter object

The input parameter object for the Locator task is either a JSON address object for...