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Monitoring land changes is an important activity in landscape planning and resource management. In this study, we analyze urban land changes in Atlanta metropolitan area through the combined use of satellite imagery, geographic information systems (GIS), and landscape metrics. The study site is a fast-growing large metropolis in the United States, which contains a mosaic of complex landscape types. Our method consisted of two major components: remote sensing-based land classification and GIS-based land change analysis. Specifically, we adopted a stratified image classification strategy combined with a GIS-based spatial reclassification procedure to map land classes from Landsat Thematic Mapper (TM) scenes acquired in two different years. Then, we analyzed the spatial variation and expansion of urban land changes across the entire metropolitan area through post classification change detection and a variety of GIS-based operations. We further examined the size, pattern, and nature of land changes using landscape metrics to examine the size, pattern, and nature of land changes. This study has demonstrated the usefulness of integrating remote sensing with GIS and landscape metrics in land change analysis that allows the characterization of spatial patterns and helps reveal the underlying processes of urban land changes. Our results indicate a transition of urbanization patterns in the study site with a limited outward expansion despite the dominant suburbanization process. 相似文献
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《Urban geography》2013,34(5):573-594
Utilizing redevelopment plans created by Central Atlanta Progress, this study explores the process of constructing a heritage tourist landscape on Atlanta's Auburn Avenue. Once home to the wealthiest African American community in the United States, Auburn Avenue went through a period of economic decline in the 1970s and 1980s. In 2000, planners for the City of Atlanta focused on redeveloping the Auburn Avenue corridor. At that time, Central Atlanta Progress began to update plans to convert Auburn Avenue into the United States' premier African American tourist destination. Utilizing those plans, this article argues that the city's redevelopment vision ties into particular aspects of African American identity, which link to neoliberal economic policies in an effort to turn Auburn Avenue into a "culturetainment" district. This vision is juxtaposed against the reaction of community residents who seek an alternative redevelopment vision. 相似文献
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JOSHUA F. J. INWOOD 《Geographical review》2011,101(2):147-163
Recognizing the connections between the construction of urban space and racial identity, this article explores an urban redevelopment scheme launched in 2004 by Big Bethel ame Church in Atlanta, Georgia. Known as the “Renaissance Walk,” Big Bethel's project is a $45 million dollar redevelopment plan to turn an adjacent city block into a mixed‐use development. By looking at the racialization of place from the perspective of those who live, work, and organize along Auburn Avenue, one of the most historically significant African American business corridors in the United States, I contend that Big Bethel's redevelopment project is emblematic of contemporary black counterpublic spaces and links the redevelopment project undertaken by Big Bethel with African American identity positions. 相似文献
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Selima Sultana 《The Professional geographer》2005,57(1):66-82
Using a sample from the comparatively most privileged group of black males, those married and living with a working spouse, this article investigates how race‐based residential locations and the spatial structure of labor markets affect commuting experiences. This research uses the most sophisticated commuting data available at the time the research was conducted, the 1990 5 percent Public‐Use Microdata Samples for the Atlanta Metropolitan Area, and again confirms severe spatial mismatch problems for central‐city blacks, regardless of socioeconomic status, household formation, and access to automobiles. However, the situation with black males living in suburban areas differs significantly as those in the southern (predominantly black) suburbs show considerable evidence of spatial mismatch, whereas the northern (predominantly white) suburbs show no such evidence. 相似文献
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Drew Whitelegg 《Area》2002,34(2):128-138
This paper argues that intra –regional competition is as important as intra –regional in the shaping of an urban region. Recent concentration on urban promotion within the discipline places an emphasis on competition between cities that should be counterbalanced by stressing the degree of competition between cities and their suburban peripheries. Using the case of Atlanta, Georgia, and in particular its Vision 2020 initiative, the paper explores how regionalist approaches can easily unravel due to continued rivalries from individual constituents. Placing its theoretical grounding within David Harvey's notion of 'structural coherence', the paper argues that regional policies within a capitalist environment of uneven development tend towards only temporary solutions. 相似文献
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Jerry Shannon Mathew E. Hauer Alexis Weaver Sarah Shannon 《The Professional geographer》2018,70(1):84-93
Although general patterns of food insecurity in the United States are known, few studies have attempted to estimate small area food security or account for ongoing socioeconomic changes. Here we address these issues by producing small area estimates of food insecurity in the Atlanta metropolitan area using two methodologies: fixed effects modeling and demographic metabolism. In both cases, we use county-level data from the Current Population Survey to determine the association between food insecurity and demographic predictors. These associations are then applied to tract-level data from the 2009 to 2013 American Community Survey and projected data for 2020 to create small area estimates of food insecurity. We find broad consensus between our two methods. For both time periods, food insecurity is highest in southern sections of the city of Atlanta and its neighboring suburbs. Projections to 2020, however, show that food insecurity rates are projected to increase in outer-ring suburbs east and west of the city while decreasing in the urban core. These results highlight the need to further adapt antihunger efforts for often sprawling suburban communities, where poverty rates are increasing but spatial mismatch combined with poor transit access might hinder access to food assistance. 相似文献
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《Urban geography》2013,34(6):528-559
This paper examines employment concentrations (commonly called niches) in the Atlanta Metropolitan Area. Concentration ratios (created from 1990 5% Public Use Microdata Samples) reveal niches characterized by gender, race, and ethnicity. White workers of both sexes commonly hold niches in white-collar occupations and non-Whites (Blacks, Mexicans, Koreans, Chinese, and Asian Indians) primarily occupy niches as blue-collar, or secondary service workers. Chinese, Korean and Asian Indian males are the only groups of non-Whites to hold jobs in a significant number of white-collar employment niches. Generally, non-White niches pay very little and for women, especially, niche employment is generally not very lucrative. Logistic regression models explore predictors of niche employment and indicate that the social constructs of ethnicity and race have the most substantial impact upon an individual's odds for niche employment. Human capital measures alone do not sufficiently account for niche employment, and segmentation theory best explains the phenomenon. 相似文献
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《Urban geography》2013,34(4):328-352
The idea of creating a balance between jobs and housing within different commuter catchment areas of a metropolis has been a prominent approach for reducing traffic congestion, air pollution, and journey-to-work times. Married-couple, dual-earner households, in which both spouses are employed, have been identified as an obstacle to the job-housing balance concept because of their constrained ability to choose a residential location near both workplaces. However, this has not yet been conclusively tested. Drawing on the 2000 5% PUMS dataset for metropolitan Atlanta, this article examines the commuting behavior of such households relative to single-earner households. The results challenge the dominant assumption that the average commutes of married-couple, dual-earner households are necessarily longer than those of single-earner households. In fact, after controlling for all forms of socioeconomic factors in the analysis, this study shows there are either no significant differences, or if there are, the average commutes of single-earner households are longer. It is a lack of affordable housing near job locations, or vice versa, and not the presence of dual-earner households, that should be blamed for lengthening commuting time and difficulties in implementing job-housing balances. 相似文献
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Susan M. Walcott 《世界地理研究》2002,11(2):27-33
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