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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>FYI – from a NC listserv:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal>Hi folks!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>As you know the American Community Survey (ACS) has replaced the Census 2000 long form that reported socioeconomic characteristics of the population such as income, poverty, educational attainment, employment, occupation, commuting, etc.. ACS samples monthly and reports data annually as either single year estimates for areas of 65,000 or more, 3-year estimates for areas of 20,000 or more, and 5-year estimates to the census tract and block group level. The ACS estimates are published with margins of error at 90% degree of confidence.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>These margins of error present problems when creating maps of the ACS data.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>George Mason University's Dept. of Geography and GeoInformation Science has developed a mapping extension that makes it possible to incorporate information on statistical uncertainty into maps featuring ACS estimates. Currently, instructions are provided in the extension's documentation for using the mapping extension with AFF 1; In the future, the extension will include instructions for AFF II.<o:p></o:p></p><p class=MsoNormal>The extension automates many tasks normally required to use ArcGIS for this purpose.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The extension works with versions 9.3 and 10.0 of ArcGIS and is available for downloading free of charge at the following link:<o:p></o:p></p><p class=MsoNormal><a href="http://gesg.gmu.edu/census/">http://gesg.gmu.edu/census/</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Bob Coats<span style='font-size:12.0pt'><o:p></o:p></span></p><p class=MsoNormal>(919) 807-4781<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Governor’s Census Liaison<o:p></o:p></p><p class=MsoNormal>North Carolina State Data Center<o:p></o:p></p><p class=MsoNormal>Strategic Management<o:p></o:p></p><p class=MsoNormal>North Carolina Office of State Budget and Management <o:p></o:p></p><p class=MsoNormal>20320 Mail Service Center<o:p></o:p></p><p class=MsoNormal>Raleigh, NC 27699-0320<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>NOTE: Email correspondence to and from this address may be subject to the North Carolina Public Records Law (GS 132) and may be disclosed to third parties by an authorized state official. <o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>