The FeatureLayer class is used for working with client-side graphics features. The FeatureLayer inherits from the GraphicsLayer, but it also offers additional capabilities such as the ability to perform queries and selections and supports definition expressions. The FeatureLayer can also be used for web editing. A FeatureLayer differs from tiled and dynamic map service layers because the feature layers bring geometry and attribute information across to the client computer to be drawn by the web browser. This can reduce the round trips to the server, and thereby improve the performance of your application. A client can request the features it needs, and perform selections and queries on those features without having to request more information from the server. The FeatureLayer is especially useful for layers that respond to user interactions such as mouse clicks or hovers. The ability to handle all that in the browser without making multiple requests of the server makes your application...
Building Web and Mobile ArcGIS Server Applications with JavaScript ??? Second Edition - Second Edition
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Building Web and Mobile ArcGIS Server Applications with JavaScript ??? Second Edition - Second Edition
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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.
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Building Web and Mobile ArcGIS Server Applications with JavaScript ??? Second Edition - Second Edition
Table of Contents (21 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
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Preface
Free Chapter
Introduction to HTML, CSS, and JavaScript
Creating Maps and Adding Layers
Adding Graphics to the Map
The Feature Layer
Using Widgets and Toolbars
Performing Spatial and Attribute Queries
Identifying and Finding Features
Turning Addresses into Points and Points into Addresses
Directions and Routing
Geoprocessing Tasks
Geometry Operations
Integration with ArcGIS Online
Creating Mobile Applications
Looking Ahead - Version 4 of the ArcGIS API for JavaScript
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