8/3/2019 Lect 01_Understanding Geographic Information

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

CE-322 Introduction to GIS and Remote Sensing

Understanding Geographic

Information

BUSHRA NASEEM

IGIS-SCEE

GeographyGeo the earth

Graphy refers to writing

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

Geography

The study of the earth's surface includeseo le's res onses to to o ra h and

climate and soil and vegetation.

The stud of natural and human constructedphenomena relative to a spatial dimension.

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Think about Geography!!

The 3 Ws of Geography

What is where

Why do I care

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

Geograph ic In fo rm at ion

The main method of identifying and representing

landscape is a map.

A map is a graphic representation of wherefeatures are, explicitly and relative to one another.

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Geograph ic In fo rm at ion

A map portrays 3 kinds of informationa ou geograp c ea ures.

The Location and extent of the feature

Attributes (characteristics) of the feature

Relationship of the feature to other features

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

Geograph ic In fo rm at ion

Location Data

ow any a n ere

Scale of Data

Local to Global

Data Presentation

Words, Charts, Graphs, Tables, or Maps

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Geograph ic In fo rm at ion

Attributes

e a r u es o a ea ure escr e orcharacterize the feature. This is what thefeature is.

Relationship

The relationship of a feature to other features is

implied from the location and attributes of allfeatures.

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

Loca t ion (Coord inat es onEarth)

North Pole

Longitude

Equator

Meridians

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South PoleLatitude

Parallels

Eart h s Coordinat e

SystemX is Longitude and isNorth Pole

Greenwich, England. Westis negative, East is positive

Y is latitude and ismeasured N and S from

South Pole

Lat = 0

Lat = -30

Long = -6 0Lat = 30

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t e equator. ort spositive and S is negative.

These are called Geographic Coordinates

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

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Scale

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Institute of Civil Engineering (NICE-NUST)

Dat a Present at ion

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At t r i bu tes

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Institute of Civil Engineering (NICE-NUST)

At t r i bu tes

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Relat ionship

London cholera epidemic 1854

Cholera deathCholera death

Water pumpWater pump

SohoSoho

+

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Fall Semester, UG-2008 9/14/20

Institute of Civil Engineering (NICE-NUST)

THANK YOU

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