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Social and Behavioral Sciences Commons™
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Articles 1 - 4 of 4
Full-Text Articles in Social and Behavioral Sciences
Evidence For Deviations From Uniform Changes In A Portuguese Watershed Illustrated By Corine Maps: An Intensity Analysis Approach, Zara Teixeira, João C. Marques, Robert Gilmore Pontius
Evidence For Deviations From Uniform Changes In A Portuguese Watershed Illustrated By Corine Maps: An Intensity Analysis Approach, Zara Teixeira, João C. Marques, Robert Gilmore Pontius
Geography
We apply a method to evaluate the strength of the evidence for deviations from uniform land change in a coastal area, in the context of Intensity Analysis. The errors in the CORINE maps at 1990 and 2006 can influence the apparent change, but the errors are unknown because error assessment of the 1990 map has never been released, while the error of the 2006 map has been checked for only some countries. The 1990 and the 2006 maps of a coastal watershed in Portugal served as the data to compute the intensities of changes among eight categories. We evaluate the …
A Suite Of Tools For Roc Analysis Of Spatial Models, Jean François Mas, Britaldo Soares Filho, Robert Gilmore Pontius, Michelle Farfán Gutiérrez, Hermann Rodrigues
A Suite Of Tools For Roc Analysis Of Spatial Models, Jean François Mas, Britaldo Soares Filho, Robert Gilmore Pontius, Michelle Farfán Gutiérrez, Hermann Rodrigues
Geography
The Receiver Operating Characteristic (ROC) is widely used for assessing the performance of classification algorithms. In GIScience, ROC has been applied to assess models aimed at predicting events, such as land use/cover change (LUCC), species distribution and disease risk. However, GIS software packages offer few statistical tests and guidance tools for ROC analysis and interpretation. This paper presents a suite of GIS tools designed to facilitate ROC curve analysis for GIS users by applying proper statistical tests and analysis procedures. The tools are freely available as models and submodels of Dinamica EGO freeware. The tools give the ROC curve, the …
Components Of Information For Multiple Resolution Comparison Between Maps That Share A Real Variable, Robert Gilmore Pontius, Olufunmilayo Thontteh, Hao Chen
Components Of Information For Multiple Resolution Comparison Between Maps That Share A Real Variable, Robert Gilmore Pontius, Olufunmilayo Thontteh, Hao Chen
Geography
This paper presents quantitative methods that allow scientists to compare the patterns in two maps that show a shared real variable. Specifically, this paper shows how to budget various components of agreement and disagreement between maps. The components are based on the separation of a map's information of quantity from its information of location. The technique also examines how variation in resolution influences the measurement of the components of information. The manner in which the measurements change as a function of spatial resolution can be more important and interesting than the results at any single particular resolution, because the results …
Expanding The Conceptual, Mathematical And Practical Methods For Map Comparison, Gilmore Robert Pontius, John Connors
Expanding The Conceptual, Mathematical And Practical Methods For Map Comparison, Gilmore Robert Pontius, John Connors
Geography
Conventional methods of map comparison frequently produce unhelpful results for a variety of reasons. In particular, conventional methods usually analyze pixels at a single default scale and frequently insist that each pixel belongs to exactly one category. The purpose of this paper is to offer improved methods so that scientists can obtain more helpful results by performing multiple resolution analysis on pixels that belong simultaneously to several categories. This paper examines the fundamentals of map comparison beginning from the elementary comparison between two pixels that have partial membership to multiple categories. We examine the conceptual foundation of three methods to …