期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2014
卷号：3
期号：2
页码：188
出版社：International Journal of Computer and Information Technology
摘要：Geographical information systems (GIS) are means of effective collection, storage, searching, transformation, analysis and display of geographic information. Geographic data are spatial data on the geographic sphere (the landscape). Their most important feature is the aspect of position, recorded, for example, as a digital terrain model. The basic requirement set up in terms of the terrain model is to calculate the terrain altitude of a specific location, object, etc. The ways of fulfilling this requirement are related mostly to the terrain model type. This article describes the methods of creation of the contour and slope lines based on a terrain model. It describes an algorithm to produce terrain models from the measured altitude, with the possibility of displaying contour lines and slope profiles. The altitude point system ensures that we interpret the system of contour lines and slope profiles correctly and it provides a simple interface to construct contour lines, slope profiles and the digital terrain model
关键词：contour lines; geographical information system; ; slope lines; terrain model
