构建Web GIS应用：ArcGIS JavaScript API深度定制

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"ArcGIS Web Development--2014" 本文档是关于ArcGIS Web开发的一份资料，由Rene Rubalcava撰写，并由Manning Publications出版。这本书主要针对那些希望构建基于Web的地理信息系统（GIS）应用的开发者，提供如何自定义ArcGIS JavaScript API工具、如何将ArcGIS数据带到Web端以及如何为移动应用用户创建安全登录的方法。 1. **ArcGIS Web开发**：ArcGIS是一款强大的地理信息系统，其Web开发部分主要涉及在Web环境中构建GIS应用程序。这包括利用ArcGIS平台的功能，如地图展示、空间分析、地理编码和地理数据管理等，创建交互式、可视化和功能丰富的Web应用。 2. **自定义ArcGIS JavaScript API工具**：ArcGIS JavaScript API是Esri公司提供的用于开发Web GIS应用的开源库。开发者可以通过这个API来定制地图控件、图层操作、事件处理等功能，以满足特定项目需求。自定义工具可以提高用户体验，使应用更符合业务逻辑。 3. **ArcGIS数据到Web**：将ArcGIS数据发布到Web，意味着将GIS数据集转换为可以在Web上访问和操作的形式。这通常涉及到数据的格式转换、服务发布和地图切片等步骤。通过这种方式，用户可以在线查看、查询和分析地理数据，无需安装专门的GIS软件。 4. **创建安全登录**：在移动应用中实现安全登录系统是为了保护用户的个人信息和应用数据不被非法访问。这可能涉及到身份验证机制（如用户名/密码、OAuth等）、加密技术（HTTPS、SSL/TLS）以及会话管理策略。开发者需要确保登录过程既便捷又安全，同时遵循最佳的安全实践。 5. **GIS在Web上的应用**：除了基本的地图展示，GIS在Web上的应用还包括数据分析、空间查询、路径规划、热点识别、地图服务集成等。这些功能使得Web GIS应用广泛应用于城市规划、环境监测、交通管理、公共安全等领域。 6. **编程与开发技巧**：书中可能涵盖了JavaScript编程基础、RESTful API使用、GIS概念、Web服务的创建和管理、响应式设计等方面的知识，帮助开发者提升技能，实现高效且功能完善的GIS应用。 7. **版权与商标声明**：出版商对内容的所有权进行了声明，指出未经许可，任何部分不得复制或传播。同时，书中可能提到了多个制造商和卖家的产品名称，它们可能是注册商标，出版商已尽可能地按照商标使用规则处理。总结来说，《ArcGIS Web Development》这本书旨在帮助读者掌握使用ArcGIS平台进行Web GIS应用开发的技能，内容涵盖API自定义、数据发布、用户认证等多个关键领域，对于想要从事GIS Web开发的专业人士来说是一份宝贵的参考资料。

ABOUT THIS BOOK

■

In chapter 1, you’ll learn how GIS can be used as a tool and the significance of

spatial applications.

■

In chapter 2, you’ll build your first map and learn the basics of spatial data and

how to query that data.

■

In chapter 3, you’ll learn the basics of the ArcGIS Server REST API and be given

a sample of how to use it to build a custom legend widget. This is also the first

dive into using the Dojo

AMD loading system.

The second part of the book walks you through a sample field collection application,

which also provides some tips on disconnected editing for mobile applications. In

part 2 you’ll learn how to structure a scalable application, build a mobile-friendly data-

collection application, and even learn some advanced techniques for disconnected

editing:

■

In chapter 4, you’ll set up an ArcGIS Online account and learn how to use Dojo

to build your application.

■

In chapter 5, you’ll learn how to edit features on the map and use authentica-

tion to secure your application, as well as how you can use LocalStorage to

enable disconnected editing.

■

In chapter 6, you’ll focus on building an application for use on a desktop

browser, freeing you up from some limitations of a mobile environment. You’ll

also learn how to use

OAuth 2.0 with ArcGIS Online and store your credentials

to allow users to log in and out. This chapter also covers how to integrate data

collected in the field with some non-spatial data.

■

In chapter 7, you’ll be introduced to more advanced subjects and techniques.

You’ll learn about the Arc

GIS WebMap specification and how to use it to config-

ure your map. You’ll also learn how to build your entire application from a sin-

gle JSON file that will configure your widgets for you. This chapter will also

describe an alternative to disconnected editing using a library called Pouch

DB.

Finally, there are three appendixes that contain supporting information. Appendix A

provides some development environment options available for writing and running

the code in this book. Appendix B is probably the most valuable appendix in this

book, as it covers basics of the Dojo Toolkit that are indispensable for using the Arc

GIS

API

for JavaScript. Appendix C discusses how to use the proxy files provided by Esri in

your application and explains why you will probably need them.

Code conventions and downloads

All source code in listings or in text is in a

fixed-width font like this

to separate it

from ordinary text. Code annotations accompany many of the listings, highlighting

important concepts. In some cases, numbered bullets link to explanations that follow

the listing.

ABOUT THIS BOOK

xvi

Source code for the examples in the book can be downloaded from the publisher’s

website at www.manning.com/ArcGISWebDevelopment.

Author Online

Purchase of ArcGIS Web Development includes free access to a private web forum run by

Manning Publications, where you can make comments about the book, ask technical

questions, and receive help from the author and from other users. To access the

forum and subscribe to it, point your web browser to www.manning.com/ArcGISWeb

Development. This page provides information on how to get on the forum once you

are registered, what kind of help is available, and the rules of conduct on the forum.

Manning’s commitment to our readers is to provide a venue where a meaningful

dialogue between individual readers and between readers and the author can take

place. It is not a commitment to any specific amount of participation on the part of

the author, whose contribution to the book’s forum remains voluntary (and unpaid).

We suggest you try asking him some challenging questions, lest his interest strays!

The Author Online forum and the archives of previous discussions will be accessi-

ble from the publisher’s website as long as the book is in print.

About the cover illustration

The figure on the cover of ArcGIS Web Development is captioned “La Demoiselle de

Compagnie,” a young woman who serves as a companion to an older and more well-

to-do woman from the aristocracy or bourgeoisie; or as a chaperone for a young,

unmarried woman, who could not go out unaccompanied. The illustration is taken

from a nineteenth-century edition of Sylvain Maréchal’s four-volume compendium of

regional dress customs published in France. Each illustration is finely drawn and col-

ored by hand. The rich variety of Maréchal’s collection reminds us vividly of how cul-

turally distinct the world’s towns and regions were just 200 years ago. Isolated from

each other, people spoke different dialects and languages. In the streets or in the

countryside, it was easy to identify where they lived and what their trade or station in

life was just by their dress.

Dress codes have changed since then and the diversity by region, so rich at the

time, has faded away. It is now hard to tell apart the inhabitants of different conti-

nents, let alone different towns or regions. Perhaps we have traded cultural diversity

for a more varied personal life—certainly for a more varied and fast-paced technolog-

ical life.

At a time when it is hard to tell one computer book from another, Manning cele-

brates the inventiveness and initiative of the computer business with book covers

based on the rich diversity of regional life of two centuries ago, brought back to life by

Maréchal’s pictures.

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