Choose a topic Research Paper Example | Topics and Well Written Essays - 3000 words

Choose a topic - Research Paper Example To achieve that, it is enough, and yet necessary to have a database and a geographic base, for example a map, and the GIS is capable of presenting a colored map that allows the visualization of the spatial pattern of the phenomenon . In the modern industrialized world, people of all ages are very mobile. Children commute between home and school or day care, and the working population commutes between home and work almost every day. A considerable proportion of the population move from one region to another within the municipality or country, or from one country to another, every occasionally (Waters, 2004) . Therefore, people expose themselves to different risk factors in different locations, and the relationship between catching a disease and the potential environmental risk factor is difficult to prove reliably. Thus, all the exposures and risks experienced earlier in life may become associated on maps with an inaccurate geographical location and may easily lead to erroneous conclu sions and etiological hypotheses without individual-level information of the exposure history (Lees, 2006). Individual-level follow-up studies lie needed to gain information of the measurement of real exposure, but are, in many cases, laborious and costly. However, it would be fascinating to carry out analyses with a spatio-epidemiological model, which would stand more based on individual-level data than coarse spatial data. These individual-level data can lie gathered, for example, by questionnaires or by using modern GPS and GIS technologies. Such a database can function as an individual-level spatial exposure history and undoubtedly strengthen the spatial analyses aimed at search for the causality of the disease (Morra, 2006). While basic spatial analysis involves some spatial queries and attribute queries complicated analysis typically, require a series of GIS operations including multiple attribute and alteration of original data, spatial queries, and generation of new data set s. The methods for organizing and structuring such operations are a major concern in spatial analysis. An efficient and effective spatial analysis is one in which the best available methods are appropriately employed for different types of spatial queries, attribute queries, and data alteration. The design of the analysis however, depends on the purpose of study (Boots, 2000). Many food activists consider access to healthy food a basic human right, and insist that policies that affect our food system should stand enacted accordingly to ensure that everyone has access to healthy food. This is a complex issue, which involves many different players but it is generally more of a concern for lower income groups because they have limited resources and mobility. There have been numerous methods used to identify and analyze food access (Waters, 2004). Mapping patterns of access to food stores using GIS technology is becoming more prevalent and increasingly effective. This technology allows users to identify areas of low food access depending on specific criteria and enables the possibility for detailed spatial analysis. Conversely, GIS technology and spatial data are not readily accessible to everyone. Community organizations are often the most concerned about food access for local residents but they lie especially limited by their capacity to utilize GIS technology. This paper explores