Methods and models of generalization of hydrographic network objects

Abstract

The purpose of the article is to study the spatial geodetic, cartometric characteristics of the hydrographic network (including artificially created objects) in Kharkiv and Poltava regions at different scales (1: 200000 1: 1000000) for further generalization. Main material. To objectively reflect the surrounding reality, it is necessary to study the terrain, its topographic and geodetic characteristics, identify patterns on the basis of this study, followed by approximation. The above calculations make it possible to systematize the cartometric indicators of the river basins and water bodies, to reveal the patterns of their development, and to create an objective picture of their state. The use of the models, developed in the article, greatly simplifies the selection of cartographic objects during generalization, which, as you know, is the central problem of technical control of maps. The study allowed the authors to develop the legend of the cartographic symbols of hydrographic objects, using various additional data. In this case, information is reflected both through cartographic symbols as well as their combination. The given correction factors, obtained from several administrative districts, help to reduce the unavoidable distortions. Based on the method of analogies and analysis of the artificial reservoirs effect on the landscape, the authors determined functional regularities of such systems. Using the method of analogy, they systematized data on water bodies, which is the basis for their further generalization. Conclusions and further research. The article proposes a generalization technique of the hydrographic network. Criteria have been developed for generalizing the reservoirs of Kharkiv and Poltava regions. The study proved the necessity to carry out cartometric works in generalizing the elements of the river network. The proposed conventions significantly improve the perception of cartographic information and are applied in the educational process. The prospect of this study is to identify the dynamics of changes in the plane of the river basin and display it on maps of different scales.