074 _ computer map

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• Computer Map Drawing

Computer Map Drawing

DelphiTutorial Series of books(074)Computer Map Drawing Organize netizens (state)Email:Shuaihj@163.com

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• Sun Yiyi
• Department of Geography, East China Normal University
• Shanghai, 200062, China

Introduction

This book mainly introduces the computer map technology andProgramDesign method. Combined with new technologies such as application Object-Oriented Programming (Object Oriented Programming) and component programming, the computer map function is implemented using more than 20 object classes for map drawing, finally, these objects are encapsulated into map components and can be used in Delphi for visual programming interface design. Map components are also extended and converted to ActiveX map components so that they can be used in other software development and use environments, for example, the following example shows how to apply the active map control to Visual Basic and Internet Explorer. This book uses Borland Delphi as an internship tool and compiles 16 step-by-step sample programs.AlgorithmTo develop your own electronic map system. To read this book, you must have the necessary basic knowledge in advance, including basic knowledge about Borland Delphi development environment, Object Pascal syntax, data structures and databases, and basic concepts of object-oriented programming. This book can be used as a course material for "computer map drawing" for geographic information system and computer graphics, or reference materials for teachers, students, technicians, and software developers who are engaged in the development of geographic information systems and graphics software.

Directory

Chapter 1 Overview

Chapter 2 basics of Program Design

Chapter 3 basic plotting

Chapter 4 Map Data Structure

Chapter 5 map projection

Chapter 6 window opening, translation, and double buffering

Chapter 7 map view

Chapter 8 Map Symbols

Chapter 9 database connection

Chapter 10 Multithreading

Chapter 2 componentization Technology

Appendix 1 objects and object hierarchy for map Functions

Appendix 2 sample procedure