Causes and consequences of error in digital elevation models

被引:335
作者
Fisher, Peter E.
Tate, Nicholas J.
机构
[1] City Univ London, Dept Informat Sci, London EC1V 0HB, England
[2] Univ Leicester, Dept Geog, Leicester LE1 7RH, Leics, England
来源
PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT | 2006年 / 30卷 / 04期
关键词
digital elevation model; digital surface model; error modelling; fitness for use; uncertainty; visualization;
D O I
10.1191/0309133306pp492ra
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
All digital data contain error and many are uncertain. Digital models of elevation surfaces consist of files containing large numbers of measurements representing the height of the surface of the earth, and therefore a proportion of those measurements are very likely to be subject to some level of error and uncertainty. The collection and handling of such data and their associated uncertainties has been a subject of considerable research, which has focused largely upon the description of the effects of interpolation and resolution uncertainties, as well as modelling the occurrence of errors. However, digital models of elevation derived from new technologies employing active methods of laser and radar ranging are becoming more widespread, and past research will need to be re-evaluated in the near future to accommodate such new data products. In this paper we review the source and nature of errors in digital models of elevation, and in the derivatives of such models. We examine the correction of errors and assessment of fitness for use, and finally we identify some priorities for future research.
引用
收藏
页码:467 / 489
页数:23
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