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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> I want to thank everyone for their input and assistance. A
great education for me.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>After several e-mails it became apparent that what I really
needed was the LEHD data…Again thanks for all you input…very HELPFUL!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
ctpp-news-bounces@chrispy.net [mailto:ctpp-news-bounces@chrispy.net] <b>On
Behalf Of </b>Patty Becker<br>
<b>Sent:</b> Friday, March 27, 2009 11:00 AM<br>
<b>To:</b> ctpp-news@chrispy.net<br>
<b>Subject:</b> Re: [CTPP] Question about PUMS data and Geography<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Martin,<br>
<br>
The 1% and 5% don't exactly refer to geography. They refer to the sampling
fraction; the proportion of the total resondents who are included in the PUMS
files.<br>
<br>
PUMS geography is based on PUMAs (Public Use Microdata Sample areas) for the 5%
files; these have to be at least 100,000 population. The 1% file uses
super-PUMAs, which have to be at least 250,000 in population size. Your state
data center should be able to tell you what the PUMAs are for your state or
area; they're also included in the 2000 census PUMS documentation. <br>
<br>
Hope this helps.<br>
<br>
Patty Becker<br>
<br>
<br>
<br>
At 03:37 PM 3/25/2009, you wrote:<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal>Hello, <br>
<br>
I am looking to create some commute flow maps and I think I remember<br>
someone mentioning (between all the please remove me from this list<br>
e-mails) that flow maps can be created by using ACS data and the PUMS<br>
geography. I was at the Census site trying to download the PUMS<br>
geography files and found that there were two types 1% and 5%. Does<br>
anyone know which geography file I should use? The 1% or the 5%?<br>
Thanks in advance, <br>
<br>
Martin Catala<br>
GIS Manager <br>
CUTR<br>
<br>
_______________________________________________<br>
ctpp-news mailing list<br>
ctpp-news@chrispy.net<br>
<a href="http://www.chrispy.net/mailman/listinfo/ctpp-news">http://www.chrispy.net/mailman/listinfo/ctpp-news</a><o:p></o:p></p>
<p>-------------------------------------------------------------------------------------------------<br>
Patricia C. (Patty) Becker
248/354-6520<br>
APB Associates/SEMCC FAX 248/354-6645<br>
28300 Franklin Road
Home
248/355-2428<br>
Southfield, MI
48034
pbecker@umich.edu<o:p></o:p></p>
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