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Full-Text Articles in Social and Behavioral Sciences
Techniques For The Visualization Of Positional Geospatial Uncertainty, Brent A. Barré
Techniques For The Visualization Of Positional Geospatial Uncertainty, Brent A. Barré
University of New Orleans Theses and Dissertations
Geospatial data almost always contains some amount of uncertainty due to inaccuracies in its acquisition and transformation. While the data is commonly visualized (e.g. on digital maps), there are unanswered needs for visualizing uncertainty along with it. Most research on effectively doing this addresses uncertainty in data values at geospatial positions, e.g. water depth, human population, or land-cover classification. Uncertainty in the data’s geospatial positions themselves (positional uncertainty) has not been previously focused on in this regard. In this thesis, techniques were created for visualizing positional uncertainty using World Vector Shoreline as an example dataset. The techniques consist of a …
Gis-Based Local Ordered Weighted Averaging: A Case Study In London, Ontario, Xinyang Liu
Gis-Based Local Ordered Weighted Averaging: A Case Study In London, Ontario, Xinyang Liu
Electronic Thesis and Dissertation Repository
GIS-based multicriteria analysis is a procedure for combining a set of criterion maps and associated criterion weights to obtain overall value for each spatial unit (location) in the study area. Ordered Weighted Averaging (OWA) is a generic algorithm of the multicriteria analysis. It has been integrated into GIS and applied for tackling a wide range of spatial problems. However, the conventional OWA method is based on an assumption of spatial homogeneity of its parameters. Therefore, it is referred to as a global model. This thesis proposes a local form OWA. The local model is based on the range sensitivity principle. …