gis basic1 presentation

8/6/2019 GIS Basic1 Presentation

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GISWorkshop

Basic1:Data&Concept

ChiekoMaene

[email protected]

MapsandStateDocumentsLibrarian

Government andGeographicInformationandDataServices

UniversityLibrary(Evanston)

NorthwesternUniversity

What is GIS

Computerized

mapping software Formal definition

A computerized

Two components

Software ArcGIS (Most popular

software in higher education )

databasemanagement systemfor capture, storage,retrieval, manipulation,analysis and display ofspatial (i.e. locationallydefined) data

GeoMedia

Google Earth (not analytical)

Data (information)

Any data withspatial/geographic info

ArcGIS

There are many generalpurpose GIS products on themarket, ArcGIS, MapInfo,GeoMedia, etc.

(Environmental SystemsResearch institute, Inc.) basedin Redlands, California

Probably the most popular GISsoftware

Current version is ArcGIS 10

(Quick) History of GIS

In the mid 1960s: the fist GIS, theCanada Geographic Information System,was created by Roger Tomlinson

Around that time US Census Bureau

1960

1970

1980 system, called DIME

1982, ESRI released ARC/INFO

BUT, until about 1990, most maps wereprinted from handmade drawings orengravings thus, it is hard to find pre1990 GIS data!

1990

2000

Why GIS ?

Add new analytical dimension(space!) to your research

90% of data are geographic in nature -Profiting from a Geographic InformationSystem, p.109.

Pre GIS maps

Charles Booths maps of poverty

Booth, a Victoriansociologist, conducted a

survey of working class lifein London between 1886and 1903. His work wasalso published in a form ofmaps, visualizing the level

of poverty by location.

Sources:http://booth.lse.ac.uk


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Pre GIS maps (cont.)

Hull-house maps and papers (1895)

A Hull-house resident, Florence Kelly two setsof maps, similar to Booths poverty map (but

with more details), based on a survey for the, .

believed that visual evidence would convey

social problems that they identified from thesurvey.

W. POLK ST

W. 12TH ST

STATEST

S.HALSTED

ST


Hull-House maps - nationality

Each property was colored to reflect the

birth place of the head of the household

in instance of multiple households in aproperty, the color was allocatedspatially in proportion to the number of

household heads.


Hull-House maps wage group

Each property was colored to reflect thehousehold wage in instance of multiple

households in a property, the color wasa oca e spa a y n propor on o enumber of households.


W.E.B. Du Bois, The Philadelphia Negro (1896)

1896 study about Negro Problem inPhiladelphia, commissioned by the

Philadelphia branch of the College

Five color coded classes

(No color) Non-blackresidents

Image from a book, Placing History (2008) Anne Kelly Knowles, ed.

(Red) Grade 1: TheMiddle Classes andthose above

(Green) Grade 2: TheWorking People, Fair toComfortable

(Blue) Grade 3: The Poor

(Black) Grade 4: Vicious

and Criminal Classes


(Left above)

John Snow, Map of cholera cases

in London, 1854

(Middle)

Chicago Health Dept, Map of influenza

cases, 1918

(Right)

Chicago Health Dept, Map of death cases

under 2 years old caused from diarrhoeal

diseases, 1913

GIS Data Making Process

Nationality of Voters Chicago Daily News Almanac for

1889

Find informationExcel table

Input the info in a

database

Tip: Slice existing data

Number of Poles

Create map data(polygons, in thiscase)Combine the datatable and graphicdata


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... and Visualize the Data

Nationality of Voters in Chicago By Ward, 1888 (1 dot = 10people )

Note : dots are placed randomly within polygons

Animation Time & Space

Darwin, Voyage of the HMS Beagle 1831-36

STEPSTEPSTEPSTEPSTEPSource: [FitzRoy, R.]Narrative of the Surveying

Voyages of H.M.S. Adventureand Beagle, Between the Year1826 and 1836, DescribingTheir Examination of theSouthern Shores of SouthAmerica and the Beagles

Circumnavigation of the Globe.Appendix to Volume II.London: J. L. Cox and Sons.1839.

Used with permission from Dr.

van Hyne, The Complete Work ofCharles Darwin Online

i i

The meteorological Journalrecorded :

- Direction & force ofwind

- Weather- Air pressure- Air & water

temperatures- Locality

- coordinate (lat/long)or- place name

The information was copiedand saved in Excel. Datawas carefully examined and

reformatted so that eachrecord represents each daybetween December 27, 1831and October 2, 1836. Place

names in the localityfieldwere translated into numericgeographic coordinates(latitude & longitude.)

GIS (Geographic InformationSystem) can map various

types of geographicinformation, such as country& place names, zip codes,street addresses andgeographic coordinates.

ArcGIS 9.3 by ESRI wasused to map the reformattedmeteorological journalrecords.

The meteorological records ofthe Beagle are like an ancientform of GPS both recorddetailed geographic locations.

Here is the mapping result ofthe daily ship locations.Note: sometimes the Beaglestayed in the same locationfor a long time, making it hardto see all ship locations (or

points.)

Animation Time & Space

Darwin, Voyage of the HMS Beagle 1831-36

Conversion : GIS KML/KMZ

GIS to KML/KMZ Step 1

Step 2

Step 3

KML/KMZ to GIS Doesn't work

or

Often with extra work

Popular GIS Maps/Methods

Typically used in Social Science

Patterns

Location: what & where things are located Association/correlation

Visual representation

Measuring spatial significance statistically

Modeling

Spatial & temporal

Prediction & Prevention (Regression analysis)

Business Mapping business locations

Source : Reference USA


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Business locations

Reference USAhttp://turing.library.northwestern.edu/lo

gin?url=http://reference.infousa.com/ Electronic database that the library

subscribes to

B oneof t he lar est business

directory companies, InfoUSA

Search by location, name andindustrial codes (SIC & NAICS)

Example Financial transactions, processing

businesses (like, Western Union)

NAICS code: 522320

Over Hispanic 2000 population

Mapping Community Assets

Mapping How things are closelylocated?

Community assets &landmarks

Schools

Parks

Housing projects

Hospitals

Community

organizations

Churches

Census Analysis

Demographic change

Census Analysis

Demographic change

1980 2000

HISPANIC

73

%

21

%

2

3

63

%

22

%

6

%

6

%

WHITE

BLACK

ASIAN

Policy Analysis

Policy Implications

Current Illinois LawIt is unlawful for a child sex offender to reside within 500 feet of a school,

playground, or any facility providing programs or services exclusively

directed toward people under age 18**, unless they owned the property**pr or to u y 7, 2000. nc u es par s, ay-care centers an pu c

school bus stops

Trend impact of the Adam Walsh Child Protectionand Safety Act of 2006?

Increase of the safety zone what if Illinois/Chicago change the restrictionfrom 500 feet to 1,000 feet, or even higher?

Iowa = 2,000 feet

Florida = 1,000 feet, Palm Beach County (FL) = 2,500 feet!

Sex Offender Residential Restrictions

500 feet1,000 feet

Note:This map doesntinclude locations of

day care centers yet!

Area would be morelimited if we add daycare centers as

another layer..


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By the way

Do you know 3,050 registeredsex offenders live inChicago? (as of 6/17/08)

Welcome to the Illinois SexOffenders RegistrationInformation Websitehttp://www.isp.state.il.us/sor/

Registered Sex OffendersGeocoded andAggregated byCommunity Area

Top 10 communities withmost offenders1. Austin 177

2. West Englewood 116

3. New City 103

4. Roseland 102

5. Englewood 96

6. Auburn Gresham 91

7. West Pullman 88

8. South Shore 84

9. Chicago Lawn 83

10.Humboldt Park - 77

Value Interpolation(like a weather map)

Gasoline price map which area sellscheapter gas ?

.

data gas stationaddress, & gas price

2. Map (geocode) the gasstation locations

3. Interpolate (i.e. fill in the

gaps) the sample gas

price in GIS

Source: GasPriceWatch.com (Reqular gasoline price survey data, 6/8/ 07-6/9-07)

Hot Spots Density analysis

Hot spot analysis

Visual approach(calculate density)

Turns crime cases

surface (a pixel table)

Each pixel (i.e. cell) has

a density value, whichcan be visualized, from

high (i.e. hot) to low (i.e.cold) values

Exploring Space to findAssociations

More than

% families below poverty Crime hotspotsChild lead poisoning

80 percentof homesbuiltbefore1978containlead paint

Chicago Prostitution Arrests Data

Updated by Chicago PoliceDepartment

Information included:

a e

Patrons name

Patrons home address

Patrons arrest address

Patron sex and age

Crime committed

(Patron race guessed)

April-May 2008, total 192 cases


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Some Patron Statistics..Mean age: 36 (youngest: 18 yrs old and oldest: 76 yrs old)

Race

What about their travel patterns..

Correlation between..

1. Age and Distance?

2. Race and Distance?

North &AshlandNorth &

Pulaski

Madison &Kilbourn

16th &Ashland

49th &Halstead

AsianAfricanAmerican

HispanicWhite

+ Patron Home+ Arrest Location

Median travel distance

(direct line)

51st &Cicero

55th &Calumet

Race N Distance

Asian 1 25.7 miles

Af ro-American 89 3.5 m iles

Hispanic 51 1.3 miles

White 51 4.6 miles

Raster Analysis

How many people would be affected by big Tsunamiwaves in Mediterranean?

1. Populated area Each cell contains #

o popua on

2. High risk area

Elevation up to10mand adjacent tocoast area

3. Mid high risk area Elevation up to 50m

and adjacent tocoast area

What is Geographic Information ?

Any information that contains geographic orspatial information

However, in GIS the information must be

readable to computers in order to use it Often called (inter-changeably)

Geographical information (or data)

Geospatial data

Spatial data

Vector and Raster

Two types of Geospatial Data

Vector data represents the real worldusing three types of geometry

Points

Large riveras a polygon (area)

Small creeks

as lines

Lines

Polygons / Areas

Raster data is a cell table

Columns (Y) x Rows (X)

Each cell contains a numeric value

Either integer or floating points

Populated areasas points


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The same features can be represented asboth vector and raster

But,vectorcanrepresentspace&featuresmoreindetail

RasterisgreatforWithSpatialAnalystextension,theycanbeconvertedtoeachother

Vector: Shapefiles

Shapefiles are the common geospatial dataformat for storing both geometry (shape) and

attribute (table) information of geographicfeatures

Almost an industry standard

Vector: Shapefiles (cont.)

Why is it called shapefiles??

Because they consist of three or more files

extension Type

.shp The main f ile that stores the feature geometry

.shx The index file thatstores the index of the feature geometry

.dbf The dBASEtable that stores the att ribute informat ion

.sbn& .sbx The files that store the spatial index of the features

.pr j The fi le that stores the coordinatesystem information

.xml Metadata for ArcGISthatstores information about theshapefiles

Required!

Examples of Shapefiles

(or vector data in general..)

Parcels Topography -

Contours


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Soil

USDA SSURGO(Soil Survey

Geographic Database)

Depth to theWater Bedrock

Environmental

Corridors

Floodplain

FEMA

Zoning Land Use


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Businesses

derived from the WI

EmploymentInsurance (ES202)data

Vector: Coverage

Outdated georelational data

model used in ArcInfomodule

Vector coverage looks justlike shapefiles

Requires multiple files (toomany!) and thus hard tomanage

Easily get corrupted

Vector: CAD drawing

CAD (Computer Aided Design)

AutoCAD

.DXF ascii/text file

.DWG binary file

Intergraph Microstation

.DGN binary file

CADs are graphic drawing tools

Used mainly by engineers, surveyorsand architects

Limited analysis & databasecapabilities

ArcGIS can view CAD files but with

limited editing capability

Raster: Grid

Raster consists of a matrix of cells (or pixels)organized into rows and columns where eachcell contains a value representing information

When representing space, rasters store theocat on an c aracter st cs on eac ce s

Raster: continuous surface

Rasters are well suited for representing thatchanges continuously across a landscape(surface.)

Examples: Elevation

Temperature

Population density


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Raster: Discrete data

Rasters can also represent discrete (or

thematic, or categorized) maps, such as: Landcover & Landuse

Ve etation t es

DEM

Original (USGS) Watersheds over DEM

Web source: http:// seamless.usgs.gov (downloadable data)

Milwaukee Metro Area Urban SprawlHistorical Aerial P hotos, 1963-2000

1963 New Berl in, Waukesha Co, WI1970 New Berl in, Waukesha Co, WI1980 New Berl in, Waukesha Co, WI1990 New Berl in, Waukesha Co, WI2000 New Berl in, Waukesha Co, WI

Source: http:// maps.waukeshacounty.gov/GISWeb/WaukCo/ waukco.asp

Really Old Aerial Photos New York (NY Evening Post, April 15,

1922)

Satellite Imagery

Baghdad (circa 2000)

Landsat image (left) & CIA map (right)

Commercial Satellite Imagery(expensive!)

SPOT - Multispectral(spatial resolution 20m)

SPOT - Panchromatic(spatial resolution 10m)

IKONOS - Multispectral

(spatial resolution 4m)


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DRG 24K

DEM 30m

DEM 10m

NAIP

iHigh Reso. Photo2006

Landcover 1992

Landcover 2001

Composite

http://http//seamless.usgs.gov/

New: Geodatabase

Both vector and raster data can be stored in a spatially-enabled relational database management system(DBMS), called geodatabase

Easier to contain and maintain geospatial data

Corporate (large DBMS)

Oracle, MS SQL Server, IBM DB2, PostgreSQL

Personal

Microsoft Access database

Vector/Raster: Geodatabase (cont.)

However, it is not suitable for sharing theinformation (interoperability problem)

In my opinion, any way

ArcGIS eodatabase is robabl read b ArcGISsoftware only

Isnt stable yet (in my opinion..)

So, we are going to stick with more conventionaldata types NO geodatabase until very end ofthis workshop

Metadata

Data about data - metadata are data (or documentation)files that describe the contents of other data files.

Readme.txt

xxxxx.met (metadata text file)

xxxxx.html (metadata HTML/web file)

xxxxx.xml (metadata XML file ArcGIS uses this)

Metadata files help you determine if the data are likely tomeet your needs.

FGDC metadata standards

FGDC: Federal Geographic Data Committee

The most popular metadata standard for geospatial data

Users need to know how to read files

7 elements Main entries

Identif ication Tit le, coverage,keywords, purpose, abstract, restr ictions

Data Qua li ty Accur acy assessment , completeness and lineage

Spatial Data Organization Datatypes (vector/raster), ink to location

Spatial Reference Coordinate system, map projection

Entity &Attribute Definit ionsof attr ibutes of the dataset

Dis tr ibut ion Information about d is tr ibutor, suchas f ile fo rmat , media type ,links

Metadata Reference Who,when and how the metadata was created

Exercise 1 : ArcCatalog

ArcCatalog is used to Organize your GIS

contents

Manage standards-based metadata

Manage geodatabasescheme

Search for and addcontent to ArcGISapplications

Document yourcontents

Manage GIS servers


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Exercise 2 : ArcMap Exercise 3 : Download & Add Data

About GIS (geospatial/spatial) data

Who produces GIS Data Are data available?

About GIS data

Data sources

Who produces GIS data ?

Answer: Government !! (generally)

Most geospatial data (maps, aerial photos,satellite imagery & GIS data) were produced byvar ous eve s o governmenta agenc es tosupport their missions

Such as: Administrative decisions

Management

Policy making

Taxation

Are GIS data available to us?

Data accessibility mostly depends on thegovernment's data access policies & laws

U.S. Federal government

Data created b federal a encies are inthe ubl icdomain with a few exceptions (i.e. security & privacyreasons)

State & local government Data access policies vary Reasons: cost recovery, reliabilities (or hesitation -

they dont want to be sued for providing data)

Other countries Vary though, data access is often limited

About GIS data

Principles Geospatial data is expensive to produce

Most data producers consider their data ascommodities

Cost recovery o not assume ree access an ree usage Exception: the U.S. federal government data Data can be copyrighted you can use data but your use is

limited Data can be licensed license terms specify who can

access/use and what can be done with the data

Data MUST be treated with care Must know the data usage restrictions before

using it

About GIS data (cont.)

How do we know what kind ofrestrictions are imposed?

Always look for and readdocuments accompanied

,files, metadata, license,disclaimer, warrantee,etc.

If not finding information thatyou need, ask dataproviders first, and then dataproducers

Source: metadata ESRI Data & Maps, Canada, area codes


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POPULAR DATASETS

Library-owned Datasets

Available :

In the Library or Library SubscriptionDatabases

ESRI Data and Maps

By ESRI Annual sets of map data bundled with ArcGIS software

products

We have: 2002 2010 (version 10, 2010)

Installed on GovInfo PCs in D:\ESRI\Data_Maps folder

Global data setshttp://www.esri.com/data/data-maps/index.html

Includes US geocoding data/tool, StreetMap USA Some files are licensed pay attention to metadata,

user/access restrictions

Global GIS Database

Collaborative effort among USGS &private GIS companies

7 CD sets Organized geographically

Central-South America

North America North Eurasia urope A fr ic a South Asia South Pacif ic

Contains base maps Dataset descriptionhttp://webgis.wr.usgs.gov/globalgis/index.ht

ml Boundaries Natural resources

Political & population data

GeoLytics CensusCDs

http://www.geolytics.com/ Easier to extract data and export as shapefiles Licensed data: in-library use only GeoLytics Census Products:

CensusCD1960 (down to tracts) CensusCD1970 (down to tracts) CensusCD1980 (down to block groups) CensusCD Blocks (1990) (blocks only) CensusCD + Maps (1990) (down to block groups) CensusCD 2000 Short Form (down to block groups) CensusCD 2000 Short Form Blocks (blocks only) CensusCD 2000 Long Form (down to block groups)

CensusCD 2000 Redistricting (earliest & simplest data down to blocks) CensusCD Neighborhood Change Database (NCDB) 1970-2000 ( tracts only) Estimates, Projections, Consumer Expenditures and Profiles (down to block groups)

Estimates & Projections limited variables only (I dont recommend the estimates..) Consumer Expenditures based on BLS survey on how people spend money, and on

what. Broken down by small geographic levels

Census Data

1970 1980 1990 2000

Neighborhood Change Database (NCDB)1970 2000 Tract Level Historical Data

China Census CDs & Databases

China Historical Census CDs

by All China Marketing Research

Historical Chinese census

population datasets 1953, 1964, 1982, 1990

2000

China Data Onlinehttp://chinadataonline.org/


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Databases (can be used in GIS)

Reference USAhttp://turing.library.northwestern.edu/logi

n?url=http://reference.infousa.com/ Electronic databasethat wesubscribe to

By one of the largest businessdirector com anies InfoUSA

NAICS = 522320 BusinessesOver

Hispanic

Population2000

, Search for businesses by location,

name or industrial codes (SIC &NAICS)

Example Locations of financial transactions &

processing businesses (like WesternUnion)

NAICS code : 522320

Tip for data downloading Selec tCSV (comma delimited) and also

Detailed data type

POPULAR DATASETS

Online / Web - International

From my favorite find more from:

http://geospatial.edublogs.org/category/best-general-gis-data-sites/best-world/

Geospatial Data Report

http://geospatial.edublogs.org/ R

esources

y a adirectory

Useful datasources organizedby geography &topic (categories)

OrganizedByCategory/Topics&

Geography

ICGSM: Global Mapping

http://www.iscgm.org/

My favorite source forinternational country

Registration is required(free)

Collaborative project Not all countries

participate in the project

But, the number ofparticipating countries is

growing!

FAO Relational World Database

http://www.fao.org/geonetwork

(type "RWDB" in What?Search box)

u e compre ens ve, e a e(in comparison to the otherdatasets)

World coverage!

OpenStreetMap

http://openstreetmap.org/

Open source "street" dataset,collected and created by

"contributors" (i.e. volunteers)using GPS

Data can be downloaded asshapefiles & geodatabases from GEOFABRIK

http://www.geofabrik.de/data/download.html

CLOUD MADEhttp://downloads.cloudmade.com/


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POPULAR DATASETS

Online / Web U.S.

From my favorite find more from:

http://geospatial.edublogs.org/category/best-general-gis-data-sites/best-united-states/

USDA Geospatial Data Gateway

http://datagateway.nrcs.usda.gov/

Download data by state or county Data available are:

DEM

DRG

Hydrologic data

Land cover & cropland data

Soils

etc.

National Map

http://nationalmap.gov/viewers.html Check also USGS Seamless

Server http://seamless.usgs.gov/

-specified boundaries i.e. draw polygon to specify area

Data available are: DEM

Basemaps (roads, boundaries)

Topical data (such as biology,

geology, hydrography)

National Atlas

http://www.nationalatlas.gov/atlasftp.html

Good place to download-, -

datasets

Data categories

Agriculture; Biology; Boundaries;Climate; Environment; Geology;History; Map Reference; People;

Transportation; Water

National Historical GIS

http://www.nhgis.org

Until recently, historical censusdata were available only from print

NHGIS:

% Afri-

American

Population1934

New source for historical censusdata:

By Univ. of Minnesota, MinnesotaPopulation Center

Download both historical census data& shapefiles

Social Explorer

http://www.socialexplorer.com

Another source for historicalcensus data: By CUNY Queens College, by a group

of academicsociolo ists

Hisotrical ata source: NHGIS

Also, provides post-decennial census annualestimates at census tractlevel

No shapefiles download, justattribute data


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Chicago GIS

http://www.cityofchicago.org

/gis The GIS data source for Chicago

Transportation

ESRI Data & Maps StreetMap, North America dataset

http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=An_overview_of_StreetMap

Bureau of Transportation Statistics NTAD source for highway and public

transportation networks, etc.http://www.bts.gov/publications/national_transportation_atlas_database/

Census TIGER lines See the census boundary files sources (slide 26)

Other related data CTPP Census Transportation Planning

Package Commuting and employment patterns

FARS Fatality Analysis Reporting SystemFARS :

pedalcyle

fatal Collisions2001-07

over bikeroutes

Business locations

Reference USAhttp://turing.library.northwestern.edu/login?url=http://reference.infousa.com/ Electronic databasethat we

subscribe to By one of the largest business

director com anies InfoUSA

NAICS = 522320 Businesses

OverHispanic

Population2000

, Search for businesses by location,

name or industrial codes (SIC &NAICS)

Example Locations of financial transactions &

processing businesses (like WesternUnion)

NAICS code : 522320

Tip for data downloading Selec tCSV (comma delimited) and also

Detailed data type

Housing

Decennial censuses Survey on housing conditions

Assisted housings HUD: A picture of subsidized households

http://www.huduser.org/datasets/assthsg.html

Property values

Foreclosures per 1,000MortgageableProperties

2007

Local tax assessors office (usually, access oneproperty at a time)

Mortgage HMDA: Home Mortgage Disclosure Act (monitors

banks lendering practices) http://www.ffiec.gov/hmda/

Tract level data available

Foreclosures Main source: local court (usually county court)

The NU Library has Chicago data by WoodstockInstitute, Chicago area community lending fact book

Tract level data available, 1999-2004

Crimes

Bureau of Justice Statisticshttp://bjsdata.ojp.usdoj.gov/dataonline/ Municipality summary data

Crime incidents Check a local police department

Warning:hard to access & collect

Crime hotspots,Feb 2005-Feb 2006

Ex. Chicago Police ClearMaphttp://gis.chicagopolice.org/

Small area (i.e. community areas) data at a time

Milwaukee COMPASS query & downloadhttp://isdweb1.ci.mil.wi.us/compass/disclaimerQuery.html

Small area data at a time

Other crime related data sources Sex Offenders Registry (IL)

http://www.isp.state.il.us/sor/ Chicago Prostitution patron arrests

http://www.chicagopolice.org/ps/

Education

National Center for EducationStatistics

http://nces.ed.gov/ School locations geocode!

Enrollment statistics etc

Chicago PublicHigh Schools

% Drop-out2006

, .

Chicago Public Schools, Officeof Research

http://acct.multi1.cps.k12.il.us/cps/accountweb/ Drop-out rate by school Performance goal achievement

rate


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Public Health

Healthcare facilities Locations -ESRI data & map, or ReferenceUSA Services county level, U.S. HRSA, Area Resource File

(http://www.arfsys.com/) - NUL has 2001-2007 on CDs

Mostly available at county level Note: access to individual level public health data

is limited you need a legitimate research

EPA Superfund sites (worsthazardous wastes sites)

overIllinois Counties PediatricCancer Rates(per 100,000)

objective County level data

IPLAN (IL) http://app.idph.state.il.us/ Cancer registry (IL)

http://www.idph.state.il.us/cancer/statistics.htm More statistics and reports by type (IL)

http://www.idph.state.il.us/health/statshome.htm

Municipalities level Cook County suburbs data reports

http://www.cookcountypublichealth.org/programs-services/community-epidemiology-health-planning/community-profiles

Chicago data reports: http://www.cchsd.org/cahealthprof.html

Other Topical Datasets

Elections 2000 presidential GIS data

2004 presidential GIS data Other historical election results CQ

Voting and Elections Collectionhttp://turing.library.northwestern.edu

Environment EPA hazardous sites

http://www.epa.gov/enviro/geo_data.html

And more

Floodplains

/login?url=http://library.cqpress.com/elections (Use "Export/Download")

Communications FCC Federal Communications

Commissionhttp://wireless.fcc.gov/geographic/

Mostly wirelesstelecommunications licenserelated data

http://www.fema.gov/hazard/

And more

Watersheds

http://nhd.usgs.gov/

And more

Wetlands

http://www.fws.gov/wetlands/data/

Renewable energy

http://www.nrel.gov/gis/data_analysis.html

etc. etc.

Physical Geography

General resources easy to use, recommended! Seamless USGS http://seamless.usgs.gov/

Ortho-imagery, elevation, landcover & landuse, satellite imageryscanned topographic map images, highway lines

USDA, Geospatial Data Gateway http://datagateway.nrcs.usda.gov/ Ortho-ima er a riculture elevation to o m a s h dro ra h, , , , ,

soils

Specific resources Hydrography

National HydrographyDataset http://nhd.usgs.gov/ Soil s

USDA Soil Geographyhttp://www.soils.usda.gov/survey/geography/

Geology/minerals

USGS mineral resources spatial data incluidng geological,geochemical & geophysical data, http://mrdata.usgs.gov/

If you need State-level Data

Find a State GIS Data Clearinghouse!http://www.gisinventory.net/summaries/ Select a state on the state summary PDF file, find

question 19 URL link for your state GIS Clearinghouse

In Illinois.. Illinois State Geological Survey - Natural Resources

http://www.isgs.uiuc.edu/nsdihome/ A variety of downloadable data

Historical aerial photographs Base map files

Web Map Services

Also known as: Basemaps, Online maps

Exercise 4 : New Shapefiles

Create a point and a polygon