Methodological summary Data for all 13 UAs (UA boundaries and census blocks for all counties comprising them) were acquired from ESRI and converted to MapInfo format for analysis. After importation, only block-level geography within the UAs studied was kept. Block-level housing unit data was then “joined” to the geography. Grid cell creation One set each of one-mile-square and one-half-mile-square cells were then created from a rectangular grid boundary drawn around each UA to encompass it in its entirety. Grid tables were then created on the basis of these bounding rectangles. UA calculation Once grid cells were created, they were assigned a value between 0 and based on the percentage of their area that fell within the UA being studied for example, if a cell fell wholly within the UA boundary, it was assigned a value of 1. Those entirely outside the area were assigned a value of 0. Those straddling the border were assigned the geographical proportion that fell within the area. 714 G. Galster, R. Hanson, M. Ratcliffe, H. Wolman, S. Coleman, and J. Freihage Downloaded by Syracuse University Library at 07:41 30 May 2013
