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Work in progress: authors - Michael Conzen (Geographical Studies) and Todd Schuble (Social Science Computing Services)

Using an experimental cartographic technique, this Chicago map shows racial dominance by neighborhood. Black, Hispanic, and White groups are designated by an assigned color. Colors blend where populations blend accordingly.

Work in progress: author - Adam Smith (Anthropology)

Tsakahovit Fortress as seen in a 1989 Soviet aerial photograph with 3-D surface overlay highlighting and extending the major visible archaeological remains at the site. These remains date to separate occupation periods during the mid-2nd and mid-1st millennia BC. In the distance is the contemporary village of Tsakahovit, Armenia.

Work in progress: author - John Felkner (Post-doctoral Fellow, NORC at University of Chicago)

Land cover change, 1979-1999, Chachoengsao Province, Thailand. This image displays land cover for the majority of Chachoengsao Province, Thailand, that was extracted from Landsat Multi-Spectral Scanner (MSS) and Landsat Thematic Mapper (TM ) satellite images (60 meter and 30 meter spatial resolution respectively) from 1979, 1989 and 1999. Green is forest cover, and the image displays the dramatic deforestation that occurred, primarily between 1979 and 1989. Yellow areas are primarily agriculture, and red areas are urbanization. The land cover data was extracted by first performing an unsupervised classification algorithm, which grouped the satellite pixels into clusters of homogeneity based on their electromagnetic spectral signatures (the intensity of reflected solar electromagnetic energy sampled along 7 specific segments, or “bands”, of the electromagnetic spectrum, that reached the satellite detector array). Next, the clusters were assigned to specific land cover categories (e.g. water, agriculture, forest, etc.) based on comparison with ground-truth GPS samples taken in Chachoengsao as well as with existing maps. The extracted land cover data was then exported into a GIS as raster thematic layers. The land cover extraction was performed to obtain inputs for a computer statistical model of land use change that was part of a Doctoral Dissertation (Felkner, 2000), and utilized data from Thailand obtained for the Townsend Thai Research Project.