Introduction to GISWhat is GIS?

GIS is an integrated system used to view and manage information about geographic places, analyze spatial relationships, and model spatial processes.

2GE110 Fall 2010 Week 1_Thursday

3

All About GIS . . .GIS allows you to discover patterns and

relationships you cannot easily see in a table

GIS stores two types of information:

Features – Objects found on Earth

( mountains, rivers, and lakes)

Attributes – Description of Features

GE110 Fall 2010 Week 1_Thursday

4

Raster Aerial Photos Satellite

Images DEM

A GIS map contains layers - a collection of graphic objects that are alikeLayers may contain features or surfacesFeatures have

shape and size location can be displayed at different sizes linked to information spatial relationships

Surfaces have a geographic expanse numeric values

Vector Points Lines Polygons

GE110 Fall 2010 Week 1_Thursday

5

Data SourcesHardcopy

Maps

Coordinates

GE110 Fall 2010 Week 1_Thursday

Digital Data

GPS

6

GIS FunctionsCapture

Store

Query

Analyze

Display

Output

GE110 Fall 2010 Week 1_Thursday

7

QuerySelect by Attributes

GE110 Fall 2010 Week 1_Thursday

Identify

Select by Location

8

AnalysisExtract

Overlay

Proximity

Statistics

GE110 Fall 2010 Week 1_Thursday

9

Display

GE110 Fall 2010 Week 1_Thursday

Graphs

Reports

Maps

10

Output

Animation (*.avi , *.mov)

GE110 Fall 2010 Week 1_Thursday

*.emf - Enhanced Metafile*.eps - Encapsulated PostScript*.ai – Adobe Illustrator*.pdf – Portable Document Format*.svg – Scalable Vector Graphics *.bmp – Bitmap*.jpg – Joint Photographic Experts Group*.png – Portable Network Graphics *.tif – Tagged Image File Format *.gif - Graphics Interchange Format

Export

Web (*.kml , *.kmz)

11

GIS Software Tools Available in GIS Lab

GE110 Fall 2010 Week 1_Thursday

12

GIS Hardware

GE110 Fall 2010 Week 1_Thursday