Book Image

Learning ArcGIS Runtime SDK for .NET

By : Ron Vincent
Book Image

Learning ArcGIS Runtime SDK for .NET

By: Ron Vincent

Overview of this book

ArcGIS is a geographic information system (GIS) that enables you to work with maps and geographic information. It can be used to create and utilize maps, compile geographic data, analyze mapped information, share and discover geographic information and manage geographic information in a database. This book starts by showing you where ArcGIS Runtime fits within Esri’s overall platform strategy. You'll create an initial map using the SDK, then use it to get an understanding of the MVVM model. You'll find out about the different kinds of layers and start adding layers, and you'll learn to transform maps into a 3D scene. The next chapters will help you comprehend and extract information contained in the maps using co-ordinates and layer objects. Towards the end, you will learn to set the symbology, decide whether to use 2D or 3D, see how to implement 2D or 3D, and learn to search and find objects. You'll also get to grips with many other standard features of the Application Programming Interface (API), including create applications and finally testing, licensing, and deploying them. Once completed, you will be able to meet most of the common requirements of any mapping application for desktop or mobile platforms.
Table of Contents (19 chapters)
Learning ArcGIS Runtime SDK for .NET
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
3
Maps and Layers
12
Configuring, Licensing, and Deploying
Index

Chapter 7. Finding, Querying, and Identifying Features

When users use your app, they are using it to retrieve information by specifying some criteria or clicking on the map/scene, and then expecting some kind of result that either provides them with the information they asked for, or lets them know that nothing was found. In this chapter, we're going to turn our attention to retrieving information from the layers we've been using so that our users can quickly and easily get information out of the app. In particular, we're going to discuss the options available in ArcGIS Runtime that allow us to find, query, and identify features in a FeatureLayer resource. We're also going to discuss the difference between Find, Query, and Identify, how tasks are relevant to this discussion, and how to implement these tasks following the MVVM pattern. We will also discuss the following topics:

  • Tasks

  • Finding features

  • Attributes and spatial queries

  • Identify