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18/05/2023

Difference between Abstract Class,Co Class and Class in ArcObject.

Difference between Abstract Class,Co Class and Class in ArcObject Context.

Abstract classes—Abstract classes cannot be used to create objects.These are a specification for subclasses through type inheritance.

For example, A "line" can be an abstract class for "primary line" and "secondary line" classes. Abstract classes are important for developers who want to create their own subclass (they show which interfaces are required and which are optional for the type of class they are implementing). Required interfaces must be implemented on any subclass of the abstract class to ensure the new class behaves correctly in the ArcObjects system.

Coclasses—Coclasses represent objects that you can directly create using the object declaration syntax in your development environment.
Classes—Classes cannot directly create objects, but objects of a class can be created as a property of another class or instantiated by objects from another class.

18/05/2023

What is Arc Engine.
ArcGIS Engine is a complete library of embeddable GIS components for developers to build custom applications. Using ArcGIS Engine, we can embed GIS functions into existing applications, including Microsoft Office products, such as Word and Excel, and build focused custom applications that deliver advanced GIS systems to many users. ArcGIS Engine consists of a software developer kit and a redistributable runtime providing the platform for all ArcGIS applications. Since ArcGIS Engine is supported on Windows, Solaris, and Linux (Intel), developers can create cross-platform custom solutions for a wide range of users.

ArcEngine application development and deployment required different types of licenses.

1.For development- ArcEngine development license
2.For Deployment- ArcEngine Runtime license

The five parts of ArcGIS Engine are outlined below.

1. Base Services—The core GIS ArcObjects required for almost any GIS application, such as feature geometry and display.

2. Data Access—ArcGIS Engine provides access to a wide variety of raster and vector formats including the power and flexibility of the geodatabase.

3. Map Presentation—ArcObjects for map creation and display with symbology, labeling, and thematic mapping capabilities including custom applications.

4. Developer Components—High-level user interface controls for rapid application development and a comprehensive help system for effective development.

5. Extensions—ArcGIS Engine Runtime is deployable with the standard functionality or with additional extensions for advanced functionality.

18/05/2023

What is ArcObject & Architecture

ArcObjects is a set of platform-independent software components, written in C++, that provides services to support geographic information system (GIS) applications on the desktop in the form of thick and thin clients and on the server.

ArcObjects is a development environment of the ArcGIS family of applications. Using Visual Basic/C Sharp/Java for Applications, it allows developers to extend these applications.

ArcObject Architecture-

The ArcGIS architecture provides rich functionality to the developer, but it is not a closed system. The ArcGIS architecture is extendable by developers external to ESRI.

The main focus of the ArcGIS architecture at version 10.x revolves around four key concepts:

Modularity—A modular system where the dependencies between components are well defined in a flexible system.
Scalability—ArcObjects must perform well in all intended operating environments, from single-user Desktop applications to multiuser and multithreaded server applications.
Multiple platform support—ArcObjects for the ArcGIS Engine and ArcGIS Server should be capable of running on multiple computing platforms.
Compatibility—ArcObjects 9.x should remain equivalent, both functionally and programmatically, to ArcObjects 8.3.