كتاب برمجة جافا سكريبت في الأرك Introducing ArcGIS API 4 for JavaScript

  

كتاب برمجة جافا سكريبت في الأرك Introducing ArcGIS API 4 for JavaScript

كتاب برمجة جافا سكريبت في الأرك Introducing ArcGIS API 4 for JavaScript

كتاب برمجة جافا سكريبت في الأرك Introducing ArcGIS API 4 for JavaScript ، استكمالا لسلسلة تعلم تطبيقات نظم المعلومات الجغرافية Learn GIS نقدم لكم كتاب Introducing ArcGIS API 4 for JavaScript ، من تأليف Rene Rubalcava

Introduction book Introducing ArcGIS API 4 for JavaScript

The ArcGIS API for JavaScript has evolved over the years to include new features that can take advantage of updates in ArcGIS Server and ArcGIS Online. The move to version 4 of the API is one of the biggest leaps in technology and features since its initial release. 

Getting Started

In this short chapter, I covered how to set up a basic application and define a dojoConfig object. You learned about the AMD loader as well as how to define AMD packages and how they are used in creating custom builds of the API using the Dojo build system. With this thorough understanding of packages, let’s move on to some concepts of the ArcGIS API 4 for JavaScript.

Maps and Views

In this chapter, I covered the relationship between maps and views and the benefits of having views manage the rendering pipeline of the data in the map. I also covered how LayerView allows you to access the features that are currently displayed in the view and the advantages of being able to query those features. You learned about the various layer types supported in the API and some of the new capabilities and functionality they provide.
I also covered the new capabilities of the Portal API and the simplicity it provides for loading layers from a portal and also for searching for various portal items. These are core concepts in the API that you can build on to create awesome applications! In the next chapter, I will cover the core fundamentals of the API—essentially the building blocks for how the API is designed—that will let you take your skills to the next level.

API Core Fundamentals

At this point, you should have a pretty good idea of how the core fundamentals of the ArcGIS API for JavaScript work. Having a solid grasp of how Accessors, collections, and promises work will greatly enhance your ability to build applications with the API.
  • Accessors provide a way for you to easily watch for property changes, instead of listening for events. 
  • Collections are useful to store data that may normally sit in an array if you want to know that the collection is updated.
  • Promises allow you to work with asynchronous data and, in the case of the views, let you know when they are ready to be used.

Scenes

This chapter covered the basics of working with scenes in the ArcGIS API for JavaScript. 3D visualizations are the newest and one of the more exciting features in the ArcGIS API 4 for JavaScript. They provide an opportunity for users to explore their data in entirely new ways, and their usefulness will only grow in future releases. You should now be familiar with the following:
  • Creating a SceneView and using WebScenes
  • Working with the camera in a scene

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