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New GIS Tutorial Book just out
Nov 25th, 2005 by JTJ

ESRI Press has a new book out, a tutorial for ArcView 9 by friends-of-the-IAJ Wilpen Gorr and Kristen S. Kurland at Carnegie Mellon University. What's of special interest to journalists is the example projects, one “creating a voting
district map for a local election” and another “
comparing
county financial information in a map.”  These, and more, would be
perfect fits in a journo's tool box.  Don't be put off by the list
price of $70; Amazon has it marked down to $45.



New GIS Tutorial Book Provides Self-Study Instruction for ArcView
21, 2005 — Redlands, California—All geographic information system (GIS) users, from classroom instructors to field surveyors, can now turn to a common resource to enhance their work.

A new workbook from ESRI Press shows how GIS meets the needs of a wide range of professions and technological abilities. GIS Tutorial: Workbook for ArcView 9
offers exercises and instructions that users can adapt to specific
training needs, whether it is teaching GIS in a classroom or using the
book for individual study. The book takes readers through the process
of using a variety of GIS functionality, from creating maps and
collecting data to using geoprocessing tools and models for advanced
analysis.

GIS Tutorial includes scripted exercises that use detailed step-by-step instructions and graphics to illustrate specific ArcGIS
tools and GIS workflows. Exercise assignments give precise instructions
and pose real-world problem scenarios including creating a voting
district map for a local election,
comparing county financial information in a map, geocoding household
hazardous wastes, and analyzing populations in California cities at
risk for earthquakes. A fully functioning 180-day trial version of ArcView 9 software on CD-ROM and a CD of data for working through the tutorials are included with the book.

GIS experts Wilpen L. Gorr and Kristen S. Kurland prepared the book
with comprehensive instruction in mind. Gorr is a professor of public
policy and information systems management at the H. John Heinz III
School of Public Policy and Management, Carnegie Mellon University,
Pittsburgh, Pennsylvania. Kurland holds a joint faculty appointment at
Carnegie Mellon University's Heinz School of Public Policy and
Management and School of Architecture, where she teaches GIS, CAD, 3D
visualization, and computer-aided facilities management.

GIS Tutorial: Workbook for ArcView 9 (ISBN 1-58948-127-5, 374 pages, $69.95) is available in bookstores and online retailers worldwide or can be purchased at Amazon Online Store or by calling 1-800-447-9778. Outside the United States, contact your local ESRI distributor. Books published by ESRI Press are distributed to the trade by Independent Publishers Group (tel.: 1-800-888-4741, Web: www.ipgbook.com).



For pricing information or to order a copy of “GIS Tutorial: Workbook for ArcView 9,”
visit Amazon Book Store.

Press Information:
Nikki Snowhite, ESRI
Tel.: 909-793-2853, extension 1-2194
E-mail (press only): Email Contact
General Information: Email Contact”



Creative analytic techniques
Nov 25th, 2005 by JTJ

A recent edition of MIT's Technology Review
tells a tale with direct parallels to analytic journalism.  That
is, investigators bringing well-known and established analytic tools to
new applications.  In this case, using computer scans to conduct a
“visual autopsies.”  See:




“Dead Men Do Tell Tales
Virtual autopsies reveal clues that forensic pathologists might miss. By John Gartner
http://www.technologyreview.com//wtr_15922,1,p1.html?trk=nl



Map Mashups: When a good idea takes off
Nov 22nd, 2005 by JTJ

CNET.com News serves up a good overview of what happens when a company pushes its powerful code kernels out to the world.


Mapping a revolution with 'mashups'

By Elinor Mills

Staff Writer, CNET News.com

November 17, 2005 4:00 AM PT

Even before Google gave its blessing, Paul Rademacher was hacking
away at the code behind its mapping application so he could mix it with
outside real estate data and see exactly where homes listed for sale
were located in the San Francisco area.

Little did the computer graphics expert know that his HousingMaps.com, which combines a Google map with house listings from the popular Craigslist community,
would be the start of an Internet phenomenon. Although Rademacher
created his site about two months before Google publicly released its
application programming interface–the secret sauce that allows
developers to create their own recipes with its maps–the company
wasn't angry.


In fact, Google hired him shortly thereafter.


“Now we see that all along there has been a huge amount of interesting
information tied around location,” Rademacher said. “Before, they had
no way of expressing that and doing anything useful with it.”


With such “mashups”–hybrid software that combines content from more
than one source–digital maps are quickly becoming a centralized tool
for countless uses ranging from local shopping and traffic reports to
online dating and community organizing, all in real time and right down
to specific addresses.


Online mapping is evolving into a historic nexus of disparate
technologies and communities that is changing the fundamental use of
the Internet, as well as redefining the concept of maps in our culture.
Along the way, map mashups are providing perhaps the clearest idea yet
of commercial applications for the generation of so-called social
technologies they represent.


They are, in a very real sense, bridging the gap between the virtual and physical worlds.


“This information has been on the Web for years,” said Mike Pegg, a Canadian programmer who runs a site called Google Maps Mania. “The map is all of a sudden bringing this information to life for us. I think it has inspired a lot of people.”


So prolific has the mapping movement become that Pegg has dedicated his
site to documenting the staggering growth of mashups. He estimates that
at least 10 mashups are created every day, each providing data that pop
up in info balloons from the digital pushpins dotting various online
maps.


Not surprisingly, this unprecedented interest is forcing change at
old-world cartography institutions. Just last week, Rand McNally
announced a new online mapping service of its own called MapEngine,
which will allow businesses to integrate maps, directions and location
search functionality into their Web sites. But such established
companies will increasingly compete with free applications that have
sprung up organically on the Web.

A monster mashup

The term “mashup” was first used in pop music when artists and DJs
began playing two songs simultaneously. In technology, it refers to a
Web site or application that combines content from multiple sources but
appears seamless upon use. Although used for various software, mashups
became an unparalleled phenomenon in digital cartography because of the
relatively easy ability to overlay all types of data on an online map
with tools from such companies as Google and Amazon.


Already, hundreds of mashups overlay maps with everything from such practical information as gas station prices, hurricane movements, hot springs sites and crime statistics to the more entertaining if not frivolous, including photos of urinals, UFO sightings, New York movie locations, taco trucks in Seattle and Hot People by ZIP Code, a mashup of Google Maps and the HotorNot.com Web site.


This wildfire popularity has touched off feverish competition among the major portals that provide mapping services,
especially since Yahoo, Microsoft's MSN and Google all released their
map programming software to the public. But another reason cited for
the boom in map mashups is one of hardware, specifically the processor
speed and storage capacity needed for satellite photos and other
resource-hogging images.

“They are taking off because the hardware has gotten to the
point where it is possible and the software has achieved a bit of
maturity, especially with Google Maps,” said Rich Gibson, co-author of
the book “Mapping Hacks.” “Until very recently you couldn't effectively
do mapping work on a personal computer.”


Hardware and software aside, however, it is the ability for anyone to
add information to a map


“You can plan a jogging route and it calculates when you should take
rests,” said Bret Taylor, product manager of Google Local, which
includes Google Maps. “It amazes us how popular this site is.”

 Google all over the map


Has Google created a de facto standard with its mapping technology?

Click here to watch video


The “about” section of Gmaps Pedometer explains: “As a runner training
for a marathon for the first time, I found myself wishing I had an easy
way to know the exact distance a certain course is, without having to
drag a GPS or pedometer around on my runs. Looking at Google Maps, and
knowing there was a vibrant community of geeks hacking it, I knew there
had to be a way. So here it is.”


Real estate and travel mashups, which inherently lend themselves to
geographically specific information, are proving particularly hot. Some
examples: Dartmaps, for real-time locations of commuter trains in Dublin, FBOweb.com, for tracking airline flight status, and TravelPost.com, which allows travelers to post journals and photos on maps, as well as get hotel reviews.


“The map is all of a sudden bringing this information to life for us. I think it has inspired a lot of people.”


–Mike Pegg, programmer, Google Maps Mania


“Travelers often have a world map on their wall with thumbtacks of
where they've been,” TravelPost.com Chief Executive Sam Shank said. “I
wanted to carry that online. I thought it was an incredible metaphor
for travels.”


For those not worried about a housing bubble, HomePriceRecords.com lists how much people paid for their homes, while real estate mashups Trulia.com and HomePages.com combine data on homes for sale with detailed neighborhood information such as park and school locations.


Other mashups have a distinct community or social perspective, such as CommunityWalk.com, which allows people to create and share maps, WeFixNYC.com, which features a map showing the potholes in New York City and tracks how long it takes to fix them, and Zvents.com, which lets people search for events according to type, date or location.


Still more are combining photos and maps, such as SmugMaps.com, which allows people to do location-based searching for photos around the globe, and Amazon.com's A9 map service, which shows street-level photos for specific addresses.


“Taking a picture and putting it on a map ties it to the real world in
a way that the Internet hasn't been able to do yet,” said Jared
Upton-Cosulich, founder of CommunityWalk.com. “In general, the Internet
has not been good at giving this information. What's near me? What's in
my neighborhood? A map makes that information easy to digest.”


“Travelers often have a world map on their wall with thumbtacks of where they've been. I wanted to carry that online.”


–Sam Shank, CEO, TravelPost.com


One Web site called KMaps,
has created software built on top of Google Maps that allows people to
get location-based information on various mobile devices, such as the
addresses of nearby restaurants and directions to get there. Developers
have already expanded the applications to include the ability to
quickly find a date in the neighborhood and other social networking
uses.


As with all successful technologies, of course, commercial interests
are never far behind, and mapping is no exception. While mashups
typically are labors of love created by passionate people who want to
share information with others, businesses see the potential for highly
targeted advertising and other lucrative applications.


“If you can build an interface and database that is useful, you can
serve contextual and geo-targeted advertising against it,” said Greg
Sterling, an analyst at The Kelsey Group.


Because they are linked to relevant information, search- or
keyword-based advertisements are more effective than traditional
“display” ads designed simply to promote a brand. Targeting ads not
only to a keyword search but to a person's specific location could be
even more effective.

It can be assumed, for example, that someone searching for
restaurants in a particular neighborhood may well be planning on dining
there. That kind of specific behavioral prediction is exactly the kind
of incentive that can lure local merchants, who have declined
advertisements to global readerships in the past because they were not
worth the relatively high price.


Local search is expected to grow from being a $418 million market this
year to $3.4 billion in 2009, according to a forecast from The Kelsey
Group.


Although Google has not served up ads on mashup sites, the company
reserves the right to include advertising in the map images provided to
mashup creators, and users must agree to display those ads without
modification, according to its terms of use.


Yahoo is selling sponsorships to certain merchants for placement on
prominent buttons that appear below a map that will show locations of
stores, wireless hot spots and other sites. Yahoo Maps also includes a
feature that shows traffic conditions and a SmartView feature that
allows people to pinpoint on the map various destinations such as
Chinese restaurants, hospitals and hiking trails.

To improve its mapping service, Yahoo Japan has been accepting
information from the public about information in their neighborhoods,
such as the opening of new stores–another illustration of the value of
social technologies and networks.

Yahoo Local
directly integrates user content and places it on a map. Typing in
“best margaritas” and a city and ZIP code, for instance, brings up
three sponsored results followed by reviews and ratings written by
customers.

“Yahoo, in particular, has seen maps as another doorway into local
information,” Sterling said. “I have historically used Yahoo Maps
because I can plot a point and find a hotel in proximity to that
location, within walking distance. That kind of information is hard to
get a sense from most text links or standard searching.”

“Taking a picture and putting it on a map ties it to the real world in a way that the Internet hasn't been able to do yet.”


–Jared Upton-Cosulich, founder, CommunityWalk.com


Companies are looking at subscription and pay-per-transaction
strategies, but so far advertising has been the “most tried and tested”
business, said Jeremy Kreitler, senior product manager for Yahoo Maps
and Local.


“For example, Holiday Inn can be plotted on a map and provide links to
do bookings and get more information,” he said. “Those are good for
getting brick-and-mortar advertisers engaged.”


Justin Osmer, MSN Search product manager, agreed. “The advertising
model is the one that will take the lead. Pay-for-call is an
interesting model. With a pizzeria example, if you click on that ad
maybe MSN Virtual Earth gets 5 cents from that call. It's taking the
click-through model one step further.”


MSN Virtual Earth allows people to layer multiple searches on one map,
for instance, pinpointing locations of restaurants, movie theaters and
hotels. Microsoft is looking into business models that would allow
merchants to add photos of their stores, hours of operation and other
information, Osmer said.


In addition, real estate mashups provide opportunities for local agents
to advertise and list, said Matt Heinz, senior marketing director of
HomePages.com. “Real estate is a killer app for aerial mapping.”


Alternative ways of making money are being tried on a small scale. On his GeocoderUS
site, author Gibson lets people enter an address and find the longitude
and latitude for free, but he charges businesses $50 for 20,000
queries.


“There will most likely be a shakeout down the road as methods for
monetization evolve and those with a solution survive,” Kreitler said.

In all likelihood, it is far too soon to tell what mapping
services or mashups will prove the ultimate successes. Driven by the
power of collaborative grassroots thinking, technology is advancing too
rapidly on this front to predict with any certainty–commercially or
otherwise.


Online maps are quickly becoming far more dynamic than ever imagined
and will soon enter new phases of development as other technologies are
mashed into the mix. Pegg of Google Maps Mania cited the street
conditions as one fertile area, where truly real-time data would
drastically change their usefulness with such alerts as traffic
accidents and storm damage.


“For a really killer map interface, the only thing left is a live video
satellite,” he said. “That's the only thing that is missing–up-to-date
mapping.” 




Crime in California stats available
Nov 17th, 2005 by JTJ

California Attorney General's statistics: availability of new statistics.

Crime
in California, 2004 – This publication contains the most comprehensive
set of data on California crimes, arrests, and criminal justice
actions. Crime in California contains information on crimes, arrests,
adult felony arrest dispositions, adult corrections, criminal justice
expenditures and personnel, citizens' complaints against peace
officers, and domestic violence.

You can view the report at:
http://ag.ca.gov/cjsc/publications/candd/cd04/Preface.pdf

View the CJSC Home Page at:
http://ag.ca.gov/cjsc



More JAGIS with Google Earth
Nov 16th, 2005 by JTJ

Another nice piece of creativity and innovation comes
along in the Google Earth mashup that depicts not just the U.S.
military deaths in Iraq, but the age and location of those
killed.  This, along with a pop-up of the causality's data, is the
kind of applied JOURNALISM tool university's — and newsrooms — should
be teaching.

Iraq Conflict Casualties Map in Google Earth

In
response to All Saints/Veterans Day, someone decided to collect and
post a memorial of those who gave their lives so far in the Iraq
conflict from the Americans and Coalition Forces. The author is called
'purblind_horus' at the Google Earth Community and he wanted this to be
as non-political as possible. He wanted to remember those who gave
their lives. He is also working to show the even larger number of
innocent Iraqi's who have lost their lives.

Once you download the war casualties file , you will see placemarks showing the locations of the homes of each soldier. The information came from the official icasualties.org
web site, and includes the 2212 casualties through 27-October-2005. In
addition to the home location of each casualty, if you click on the
placemark it may contain a photo, a link to basic background
information, and links to other information, if available, such as news
stories.

This is a valuable, and sobering, effort. It has been greatly
appreciated by many at the GEC, and I hope some find it worthwhile here
at the GEB as well. Here's the original post. Good work 'purblind_horus'!

Posted by FrankTaylor at November 15, 2005 08:16 AM”



Who's sitting on local juries in Louisville, Kentucky?
Nov 10th, 2005 by JTJ

A nice bit of AJ done by the folks at the Louisville
[Kentucky] Courier-Journal
, who analyzed the jury pool and composition
in the C-J's home county.  Some good thinking and moderate
statistical-lifting drives the series.

See http://tinyurl.com/cr98h

“Jury not of their peers
In Jefferson County”

People who live in mainly African-American areas
are less likely to serve than those from mostly white areas, a
Courier-Journal analysis found.



Yes, Virginia, methodology DOES matter
Nov 10th, 2005 by JTJ

A piece on calling the elections in Detroit:


MAKING A FORECAST: A secret formula helps producer call the election right

BY CHRIS CHRISTOFF

FREE PRESS LANSING BUREAU CHIEF

November 10, 2005


What was a viewer to believe?


As polls closed Tuesday, WDIV-TV (Channel 4) declared Freman Hendrix winner of Detroit's mayoral race by 10 percentage points.


WXYZ-TV (Channel 7) showed Hendrix ahead by 4 percentage points, statistically too close to call.


But WJBK-TV (Channel 2) got it right, declaring just after 9 p.m. that
Mayor Kwame Kilpatrick was ahead, 52% to 48%, which turned out to be
almost exactly the final 53%-47% outcome declared many hours later.


And it was vote analyst Tim Kiska who nailed it for WJBK, and for WWJ-AM radio, using counts from 28 of 620 Detroit precincts.


Kiska did it with help from Detroit City Clerk Jackie Currie. She
allowed a crew that Kiska assembled to collect the precinct tallies
shortly after the polls closed at 8 p.m.


Using what he calls a secret formula, Kiska calculated how those 28 precincts would predict the result citywide.


His formula also assumed that absentee voters chose Hendrix over Kilpatrick by a 2-1 ratio.


That's different from the methods of pollsters who got it wrong
Tuesday, Steve Mitchell for WDIV and EPIC/MRA's Ed Sarpolus for WXYZ
and the Free Press. Both men used telephone polls, calling people at
home during the day and evening and asking how they voted.


It's a more standard method of election-day polling, but Tuesday proved treacherous.


Kiska, a former reporter for the Free Press and Detroit News, has done
such election-day predictions since 1974, but said he was nervous
Tuesday.


“Every time I go into one of these, my nightmare is I might get it
wrong,” said Kiska, a WWJ producer. “I had a bad feeling about this
going in. I thought there was going to be a Titanic hitting an iceberg
and hoping it wouldn't be me.”


Kiska said he especially felt sorry for his friend Mitchell.


Mitchell said he's been one of the state's most accurate political
pollsters over 20 years, but said his Tuesday survey of 800 voters
turned out to be a bad sample.


He said polling is inherently risky, and that even well-conducted polls
can be wrong one out of 20 times. “I hit number 20 this time.”


For Sarpolus, it's the second Detroit mayoral race that confounded his
polls. He was the only major pollster in 2001 who indicated Gil Hill
would defeat Kilpatrick.


Sarpolus said the pressure to get poll results on the air quickly made
it impossible to adjust his results as real vote totals were made
public during the late evening.


Of Kiska, Sarpolus said: “You have to give him credit. … But you have to assume all city clerks are willing to cooperate.”

Contact CHRIS CHRISTOFF at 517-372-8660 or christoff@freepress.com.




Geocoding and the GISCorps
Nov 10th, 2005 by JTJ

An interesting piece today from CNN on the value of geographers in the hurricane rescuse and recovery business.

See http://edition.cnn.com/2005/TECH/11/10/gis.technology/

'Geocoding' used to locate Katrina survivors

Street addresses not very useful after hurricane hit

By Marsha Walton
CNN

(CNN)
— Police, firefighters, and Coast Guard crews may be the first to come
to mind when naming the lifesavers during disasters such as Hurricane
Katrina.

It might be time to add geographers to that list.

In
the sometimes desperate hours following Katrina's landfall, experts in
geographic information services — GIS — helped search and rescue
crews reach more than 75 stranded survivors in Mississippi.

One
of their most valuable tools was a process called “geocoding,” the
conversion of street addresses into global positioning system (GPS)
coordinates.

With streets flooded, street signs missing, and
rescue crews unfamiliar with the Gulf Coast area, street addresses were
not very useful.

“They would get phone calls, or the Coast Guard
would come in with addresses in their hands and say, 'I need a latitude
and longitude for this address.' So the GIS professionals would do a
geocoding, give it to the Coast Guard who got on helicopters and saved
lives,” said Shoreh Elhami, director of GISCorps.

Elhami,
co-founder of GISCorps, said that since 2004, the organization's
volunteers have responded to disasters such as the Asian tsunami and
Hurricane Katrina, as well as efforts to provide humanitarian relief,
sustainable development, economic development, health, and education in
all parts of the world.

The Corps had 20 volunteers on the ground in Mississippi less than 48 hours after Katrina's landfall.

GISCorps
is part of URISA, the Urban and Regional Information Systems
Association. Elhami said more than 900 qualified volunteers have GIS
experience, and range from from city and state government officials to
academics to people in private industry.

Volunteer Beth McMillan,
a field geologist and professor at the University of Arkansas in Little
Rock, worked in Pearl River County, Mississippi, a couple of weeks
after the storm.

“A couple of days after the hurricane hit, I
felt so down, and wondered what I could do. I could give a little bit
of money, but that doesn't seem very satisfying. To be able to have a
skill that can be used is much more empowering, it doesn't make you
feel so helpless,” said McMillan, back in Little Rock.

Although rescue efforts were over by the time she arrived, there were scores of other tasks she and her colleagues completed.

“We
had laptops and map plotters, and a database that the group from the
first week had put together. One map we produced showed cell phone
towers in the county, and the estimated coverage of those towers.
Everybody was communicating with cell phones and they needed to figure
out where to go within the county to talk to one another,” McMillan
said.

McMillan described the volunteer efforts as a sort of “Maps to Go” for a wide range of people needing immediate information.

Their
maps detailed road conditions, power outages, underground gas storage,
and facilities with hazardous materials. Agencies from FEMA to the Red
Cross to local utilities relied on the information that they constantly
updated.

“This is how technology can make a difference,” said
David Shaw, director of the GeoResources Institute at Mississippi State
University.

“It was a great team effort,” said Shaw, for a crisis that he said had deteriorated into a Third World situation.

Shaw
said he was amazed at the talent and the creativity of, basically, a
roomful of strangers at these county Emergency Operations Centers.
While eventually satellite links and Internet connections made the
tasks easier, in some cases large amounts of data had to be driven
several hours from one site to another.

Volunteers are never sure
of the conditions they might face when deployed to disaster sites or
developing countries. Assignments usually last between two weeks and
two months. McMillan said her many experiences “roughing it” as a field
geologist helped her deal with the living conditions in Mississippi.

“They
said be prepared for really hot weather, and bring a sleeping bag,” she
said. “I slept in an empty U.S. Department of Agriculture building on a
cot, with probably several hundred other people. But it did have power,
bathrooms, and showers, so conditions were not as bad as they could
have been,” she said.

She and her colleagues ate MREs (military meals ready to eat) and worked 12-plus hour days every day.

“We
did get a chance to tag along one afternoon with a couple of National
Guardsmen from Mississippi on a trip to the coast. That was one of the
most memorable experiences of my life. I've never seen such
destruction, and the only way to really understand it is to see it in
person,” she said.


 
 



Social Networks and Reporting
Nov 10th, 2005 by JTJ

Our friend Sree Sreenivasan,
on the J-school faculty at Columbia, posts an interesting column on the
Poynter site today on social networking.  Remember, “social networks” is/are not quite the same as Social Network Analysis, but they are close conceptual relatives.  

Sree has linked to some valuable sites we didn't know about, so check out “Social Networking for Journalists” at http://www.poynter.org/column.asp?id=32&aid=91496




Various "populations" of a city
Nov 9th, 2005 by JTJ

A city never sleeps?  Well, some do, at least according to a fairly recent report from the Census Bureau. 


Census Bureau Releases First-Ever Data On Daytime Populations for Cities and Counties

October 21, 2005

Company: U.S. Census Bureau
Industry: Demographic Data
Location: Washington, DC, United States of America


If it seems a little crowded on weekdays in cities like Washington,
D.C.; Irvine, Calif.; Salt Lake City, Utah; or Orlando, Fla.; it's not
your imagination. Among cities with 100,000 or more people, these four
show the highest percentage increases in population during the day as
opposed to their resident population.


The findings come from the first-ever U.S. Census Bureau estimates of
the daytime population for all counties and more than 6,400 places
across the country, based on Census 2000 data.

The concept of the daytime population refers to the number of
people, including workers, who are present in an area during normal
business hours, in contrast to the resident population present during
the evening and nighttime hours.


“Information on the expansion or contraction experienced by different
communities between nighttime and daytime is important for many
planning purposes, including those dealing with transportation and
disaster relief operations,” said Census Bureau Director Louis
Kincannon. “By providing information on the number of people not living
in the area, but nevertheless greatly affected by the event, the data
can provide a clearer picture of the effects of disasters such as
Hurricanes Katrina and Rita.”


The places where the largest percent increases in daytime over
nighttime populations occur tend to be those with small resident
populations. For example, among medium-sized cities, Greenville, S.C.,
has a daytime population that is 97 percent higher than its nighttime
population. Palo Alto, Calif., increases by about 81 percent, and Troy,
Mich., by 79 percent. Among very small places, gains approached 300
percent in Tysons Corner, Va. (292 percent); and El Segundo, Calif.
(288 percent).


Other highlights:

  • New York City has the largest estimated daytime population, at more
    than 8.5 million persons. The increase of more than half a million
    people over the nighttime population is bigger than that found in any
    other area. However, the 7 percent increase puts New York in the middle
    of the pack on percentage change among cities with more than a million
    residents.
  • The second highest numeric daytime increase is in Washington,
    D.C., where 410,000 workers boost the capital's population by 72
    percent during normal business hours.
  • Other big cities with large daytime gains are Atlanta (62
    percent), Tampa (48 percent) and Pittsburgh and Boston (both around 41
    percent).
  • Typical examples of sizable expansion of daytime populations
    in small cities can be found in places such as Paramus, N.J.; Redmond,
    Wash.; and Beverly Hills, Calif., among others.
  • About 250,000 people worked in New Orleans prior to Hurricane
    Katrina. Almost 150,000 of these workers were residents of New Orleans,
    but the remaining 100,000 lived outside the city.
  • One of the most extreme examples of daytime population
    increase is Lake Buena Vista, Fla., which has almost no permanent
    residents but swells to an employment center of more than 30,000 people
    during the day.

  • Additional tables are available on the Census Bureau's Internet
    site
    at . Choose the “Subjects A to Z” link at the top of the page,
    click on the letter “D” and then select the link to “Daytime
    Population.”

    Mike Bergmann (pio@census.go)
    Phone: (301) 763-3030



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