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Lecture 2 Introduction to GIS (Based on lecture notes of ...

Lecture 2. Introduction to GIS. (Based on Lecture notes of Dr. Piotr Jankowski, former professor in Department of Geography at UI). Objective The purpose of this Lecture is to provide an Introduction to GIS and give an overview of basic theoretical and technical concepts in GIS. Contents 1. What is GIS. 2. Spatial Data Models Data Model Data Model 3. Map Projections and Coordinate Systems in GIS. 1. What is a GIS? A Geographic Information system (GIS) is a computer system for capturing, storing, querying, analyzing, and displaying geographic data. Like any other information technology, GIS can be divided into the following four components: computer system , GIS software, brainware, and infrastructure. Computer system The computer system includes the computer and the operating system to run GIS. Typically the choices are PCs that use the Windows operating system ( , Windows 2000, Windows XP). or workstations that use the UNIX operating system .

Integration of GIS with other technologies such as Global Positioning System (GPS) and the Internet has introduced new applications. To learn more about GIS, go ... Integration of both vector and raster data is a common feature in a GIS project. A grid consists of rows, columns, and cells. The origin of rows and columns is at the upper left corner

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