11 November 2008 Contour fitting with moving surface considering sample dispersion
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Proceedings Volume 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses; 71462O (2008); doi: 10.1117/12.813192
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China
Abstract
Contour fitting based on moving surface is a common algorithm in map digitalization. But due to the limitation of the elevation fitting models, the elevation of grid points in the DEM may comprise systematic errors, and it is unavoidable to cause the local distortion of the generated contour. In this paper, sample dispersion factor was introduced to the elevation fitting model for the grid point in the DEM, which was related to both the number of the sampled points in the selected area around the fitting point and the distances between the sampled points. The influence of sample dispersion factor was analyzed comprehensively, and the rule for optimally selecting points was discussed. Furthermore, the steps to fit contours considering the sample dispersion factor were suggested. With simulated data collected from a standardized digital map, the precision of the generated contour considering sample dispersion factor was analyzed in detail and some beneficial conclusions were made.
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Mingfeng Li, Chunhui Chen, Bo Yuan, Zhenyu Zhu, Huan Zhou, "Contour fitting with moving surface considering sample dispersion", Proc. SPIE 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses, 71462O (11 November 2008); doi: 10.1117/12.813192; https://doi.org/10.1117/12.813192
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KEYWORDS
Visualization

Distortion

Factor analysis

Mathematical modeling

Radium

Statistical analysis

Statistical modeling

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