Parent map for Rockwall County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:10,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Rockwall County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:10,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Grayson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:15,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

This paper presents methods and results of county-level population estimation using Landsat Thematic Mapper (TM) images of Denton County and Collin County in Texas. Landsat TM images acquired in March 2000 were classified into residential and non-residential classes using maximum likelihood classification and knowledge-based classification methods. Accuracy assessment results from the classified image produced using knowledge-based classification and traditional supervised classification (maximum likelihood classification) methods suggest that knowledge-based classification is more effective than traditional supervised classification methods. Furthermore, using randomly selected samples of census block groups, ordinary least squares (OLS) and geographically weighted regression (GWR) models were created for total population estimation. The overall accuracy of the models is over 96% at the county level. The results also suggest that underestimation normally occurs in block groups with high population density, whereas overestimation occurs in block groups with low population density.

Patent relating to applications of hydrogen gas getters in mass spectrometry.

Interview with Raymond Curtis, longtime resident and school administrator of Weatherford, Texas, as part of the Weatherford Oral History Project. The interview includes Curtis' personal experiences of farm life in the Great Depression, childhood in Collin County, Texas, and education at the University of North Texas under the GI Bill. Additionally, Curtis discusses his family history, his career as a teacher, administrator, and coach in various public school districts, the integration of Weatherford schools, the school-building program, and his career as CEO of the Weatherford Chamber of Commerce.

Minutes for the April 8, 2010 TXSSAR meeting, held by the McKinney chapter.

Webpage from McKinney TXSSAR website containing photographs from a December 9, 2010 meeting.

Webpage from McKinney TXSSAR website containing photographs from a parade on December 11, 2010.

Minutes for the February 25, 2010 TXSSAR meeting, held by the McKinney chapter.

Webpage from McKinney TXSSAR website containing photographs from a June 10, 2010 meeting.

Webpage from McKinney TXSSAR website containing photographs from a March 11, 2010 meeting at El Chico Cafe.

Webpage from McKinney TXSSAR website containing a photograph of the Color Guard at a Collin County Historical Commission event on May 15, 2010.

Minutes for the May 22, 2010 TXSSAR meeting, held by the McKinney chapter.

Webpage from McKinney TXSSAR website containing photographs from a troop-greeting event at the DFW Airport on November 24, 2010.