<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">FWIW, I attended the tutorial he gave on the tool at AAG last month, and it's really quite an interesting tool. <div><br></div><div>I strongly suggest reading the appropriate ACS Compass guide(s). </div><div><a href="http://www.census.gov/acs/www/guidance_for_data_users/handbooks/">http://www.census.gov/acs/www/guidance_for_data_users/handbooks/</a><br><div><br></div><div>I look forward to working with it more.</div><div><br></div><div>Darrell</div><div><br></div><div><br><div><div>On May 17, 2011, at 11:03, Richard Lycan wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><o:smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode">
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<div class="Section1"><p class="MsoNormal" style="text-autospace:none"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">David Wong at <st1:place w:st="on"><st1:placename w:st="on">George</st1:placename> <st1:placename w:st="on">Mason</st1:placename>
<st1:placename w:st="on">University</st1:placename></st1:place> recently
released an extension that facilitates the mapping of data from the American
Community Survey (ACS), particularly the mapping of the margin of error (MOE) for
the estimates. The project was funded <st1:personname w:st="on">b</st1:personname>y
the U.S. Bureau of the Census. The data for small geographies, such as census
tracts and <st1:personname w:st="on">b</st1:personname>lock groups, were released
earlier this year. Due to the smaller sample size for the ACS compared to the
2000 Census long form data the MOE for these ACS data are relatively larger. When
presenting the ACS data for small geographies on maps the cartographer should
advise the viewer of the relia<st1:personname w:st="on">b</st1:personname>ility
issues. David Wong’s extension provides assistance in doing this. It also
has good instructions that explain how to download the ACS data and handles the
joining of map and attri<st1:personname w:st="on">b</st1:personname>ute data.
The extension and <st1:personname w:st="on">b</st1:personname>ackground on using
ACS data may <st1:personname w:st="on">b</st1:personname>e downloaded at: </span></font><font size="2" face="Courier New"><span style="font-size:10.0pt;font-family:"Courier New""><a href="http://gesg.gmu.edu/census">http://gesg.gmu.edu/census</a><o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;
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font-family:Arial"><o:p> </o:p></span></font></p><p class="MsoAutoSig"><font size="2" face="Arial"><span style="font-size:10.0pt;
font-family:Arial">Richard Lycan</span></font><o:p></o:p></p><p class="MsoAutoSig"><font size="2" face="Arial"><span style="font-size:10.0pt;
font-family:Arial">Professor Emeritus of Geography and Ur<st1:personname w:st="on">b</st1:personname>an
Studies</span></font><o:p></o:p></p><p class="MsoAutoSig"><st1:place w:st="on"><st1:placename w:st="on"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">Population</span></font></st1:placename><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial"> <st1:placename w:st="on">Research</st1:placename> <st1:placetype w:st="on">Center</st1:placetype></span></font></st1:place><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">, Mail Code
PRC</span></font><o:p></o:p></p><p class="MsoAutoSig"><font size="2" face="Arial"><span style="font-size:10.0pt;
font-family:Arial">Room 780P Ur<st1:personname w:st="on">b</st1:personname>an
Center<o:p></o:p></span></font></p><p class="MsoAutoSig"><st1:placename w:st="on"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">Portland</span></font></st1:placename><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial"> <st1:placetype w:st="on">State</st1:placetype> <st1:placetype w:st="on">University</st1:placetype>,
<st1:place w:st="on"><st1:city w:st="on">Portland</st1:city>, <st1:state w:st="on">OR</st1:state>
<st1:postalcode w:st="on">97207</st1:postalcode></st1:place><o:p></o:p></span></font></p><p class="MsoAutoSig"><font size="2" face="Arial"><span style="font-size:10.0pt;
font-family:Arial">503-725-5158 (office)<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;
font-family:Arial">503-880-3230 (cell)</span></font><o:p></o:p></p><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:
12.0pt"><o:p> </o:p></span></font></p>
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