منابع مشابه
Simplifying Massive Contour Maps
We present a simple, efficient and practical algorithm for constructing and subsequently simplifying contour maps from massive high-resolution DEMs, under some practically realistic assumptions on the DEM and contours.
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Contouring remains a major application of computer graphics. Contours are typically modelled, rst as conic sections, and then as straight-line approximations to the conics. In this paper, it is shown how the accuracy of this straight-line approximation can be indicated. In addition, a reenement is proposed that yields a better straight-line approximation without major cost overhead.
متن کاملThe impact of spatial structure on the accuracy of contour maps of small data sets.
Spatial analysis of insect counts provides important information about how insect species respond to the heterogeneity of a given sampling space. Contour mapping is widely used to visualize spatial pest distribution patterns in anthropogenic environments, and in this study we outlined recommendations regarding semivariogram analysis of small data sets (N < 50). Second, we examined how contour m...
متن کاملAccuracy of contour lines using 3D bands
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متن کاملContour Extraction and Visulization from Topographic Maps
Recognition of features in topographic maps is useful for GIS applications. In particular, elevation data can be extracted and utilized by recognizing contour lines in maps. In this project, the viability of contour extraction using image segmentation and Delaunay triangulation for line reconstruction was investigated. Results suggest that, while the method has a high success rate for well beha...
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ژورنال
عنوان ژورنال: Journal of Navigation
سال: 1954
ISSN: 0373-4633,1469-7785
DOI: 10.1017/s0373463300028083