On the quality of DCW hypsographic data: A study for Taiwan

Tian-Yuan Shih; Young Chyi Chiu; Hong Yang Shih

On the quality of DCW hypsographic data: A study for Taiwan

Tian-Yuan Shih^*, Young Chyi Chiu, Hong Yang Shih

^*Corresponding author for this work

Department of Civil Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The objective of this study is to investigate the quality of DCW hypsographic data. During the investigation, grid DEMs were generated for Taiwan. The results were graphically evaluated, and five numerical indices are also presented. These indices provide information about the maximum error, the 90 percent ranking error, the root mean squares error, the mean absolute error, and the mean error. The spot heights from DCW were used as check points. For the 30″ × 30″ grid DEM generated with the constrained TIN-linear model, the root mean square error was 176.836 m and the 90 percent ranking error was 213.149 m, with the bias removed.

Original language	English
Pages (from-to)	27-35
Number of pages	9
Journal	Surveying and Land Information Science
Volume	63
Issue number	1
State	Published - 1 Mar 2003

Cite this

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title = "On the quality of DCW hypsographic data: A study for Taiwan",

abstract = "The objective of this study is to investigate the quality of DCW hypsographic data. During the investigation, grid DEMs were generated for Taiwan. The results were graphically evaluated, and five numerical indices are also presented. These indices provide information about the maximum error, the 90 percent ranking error, the root mean squares error, the mean absolute error, and the mean error. The spot heights from DCW were used as check points. For the 30″ × 30″ grid DEM generated with the constrained TIN-linear model, the root mean square error was 176.836 m and the 90 percent ranking error was 213.149 m, with the bias removed.",

author = "Tian-Yuan Shih and Chiu, {Young Chyi} and Shih, {Hong Yang}",

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AB - The objective of this study is to investigate the quality of DCW hypsographic data. During the investigation, grid DEMs were generated for Taiwan. The results were graphically evaluated, and five numerical indices are also presented. These indices provide information about the maximum error, the 90 percent ranking error, the root mean squares error, the mean absolute error, and the mean error. The spot heights from DCW were used as check points. For the 30″ × 30″ grid DEM generated with the constrained TIN-linear model, the root mean square error was 176.836 m and the 90 percent ranking error was 213.149 m, with the bias removed.

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On the quality of DCW hypsographic data: A study for Taiwan

Abstract

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