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- Boundary_problem_in_geography abstract "As distinct from the demarcation problem or boundary problem in the philosophy of science, boundary problem in spatial analysis is a geographical phenomenon as one of the four major issues that interfere with an accurate estimation of the statistical parameter; the four issues include the boundary problem as well as the scale problem, pattern problem (or spatial autocorrelation), and modifiable areal unit problem (Barber 1988). The boundary problem occurs because of the loss of neighbors in analyses that depend on the values of the neighbors. While geographic phenomena are measured and analyzed within a specific unit, identical spatial data can appear either dispersed or clustered depending on the boundary placed around the data. In analysis with point data, dispersion is evaluated as dependent of the boundary. In analysis with areal data, statistics should be interpreted based upon the boundary.In geographical research, two types of areas are taken into consideration in relation to the boundary: an area surrounded by fixed natural boundaries (e.g., coastlines or streams), outside of which neighbors do not exist (Henley 1981), or an area included in a larger region defined by arbitrary artificial boundaries (e.g., an air pollution boundary in modeling studies or an urban boundary in population migration) (Haining 1990). In an area isolated by the natural boundaries, the spatial process discontinues at the boundaries. In contrast, if a study area is delineated by the artificial boundaries, the process continues beyond the area.If a spatial process in an area occurs beyond a study area or has an interaction with neighbors outside artificial boundaries, the most common approach is to neglect the influence of the boundaries and assume that the process occurs at the internal area. However, such an approach leads to a significant model misspecification problem (Upton and Fingleton 1985).That is, for measurement or administrative purposes, geographic boundaries are drawn, but the boundaries per se can bring about different spatial patterns in geographic phenomena (BESR 2002). It has been reported that the difference in the way of drawing the boundary significantly affects identification of the spatial distribution and estimation of the statistical parameters of the spatial process (Cressie 1992; Fotheringham and Rogerson 1993; Griffith 1983; Martin 1987). The difference is largely based on the fact that spatial processes are generally unbounded or fuzzy-bounded (Leung 1987) but the processes are expressed in data imposed within boundaries for analysis purposes (Miller 1999). Although the boundary problem was discussed in relation to artificial and arbitrary boundaries, the effect of the boundaries also occurs according to natural boundaries as long as it is ignored that properties at sites on the natural boundary such as streams are likely to differ from those at sites within the boundary (Martin 1989).The boundary problem occurs with regard not only to horizontal boundaries but also to vertically drawn boundaries according to delineations of heights or depths (Pineda 1993). For example, biodiversity such as the density of species of plants and animals is high near the surface, so if the identically divided height or depth is used as a spatial unit, it is more likely to find fewer number of the plant and animal species as the height or depth increases.Figure 1. Boundary problem: urban sprawl in central Florida (an evaluation by land cover analysis with raster datasets vs. an evaluation by population density bounded in the census tract)Figure 2. Boundary problem: horizontal boundariesFigure 3. Boundary problem: vertical boundaries".
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- Boundary_problem_in_geography wikiPageRevisionID "625906822".
- Boundary_problem_in_geography wikiPageWikiLink Category:Geometry.
- Boundary_problem_in_geography wikiPageWikiLink Central_place_theory.
- Boundary_problem_in_geography wikiPageWikiLink Demarcation_problem.
- Boundary_problem_in_geography wikiPageWikiLink Generalized_least_squares.
- Boundary_problem_in_geography wikiPageWikiLink Geographic_information_system.
- Boundary_problem_in_geography wikiPageWikiLink Modifiable_areal_unit_problem.
- Boundary_problem_in_geography wikiPageWikiLink Sensitivity_analysis.
- Boundary_problem_in_geography wikiPageWikiLink Spatial_analysis.
- Boundary_problem_in_geography subject Category:Geometry.
- Boundary_problem_in_geography hypernym Phenomenon.
- Boundary_problem_in_geography type Disease.
- Boundary_problem_in_geography comment "As distinct from the demarcation problem or boundary problem in the philosophy of science, boundary problem in spatial analysis is a geographical phenomenon as one of the four major issues that interfere with an accurate estimation of the statistical parameter; the four issues include the boundary problem as well as the scale problem, pattern problem (or spatial autocorrelation), and modifiable areal unit problem (Barber 1988).".
- Boundary_problem_in_geography label "Boundary problem in geography".
- Boundary_problem_in_geography sameAs Q18205633.
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- Boundary_problem_in_geography sameAs Q18205633.
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- Boundary_problem_in_geography isPrimaryTopicOf Boundary_problem_in_geography.