Метод совмещения геопространственных данных

Abstract

В статье проведена общая оценка необходимости синтеза реалистичных ландшафтов местности для тренажерных комплексов (ТК) с целью улучшения процесса обучения экипажей военной техники, повышения качества взаимодействия между оператором и ТК. Выделены аспекты, которые говорят о целесообразности проведения обучения на синтезированном ландшафте заданной области. Разработан алгоритм и согласно ему реализована программа для обработки данных цифровой модели местности, результатом которой является карта высот SRTM в проекции Меркатора (эллиптической или Web). На практических примерах показано совпадение наложенного изображения снимка земной поверхности с преобразованной картой высот, что подтверждает корректность описанного метода и его реализации.

In article the general assessment of need of synthesis of realistic landscapes of terrain for the training complexes (TC) for the purpose of improving of training activity of crews of military equipment, improvement of quality of interaction between the operator and TC is carried out. Aspects which speak about feasibility of carrying out training at the synthesized landscape of the given area are mentioned. The basic data containing geospatial information and methods of operation with them are analyzed. For processing of geospatial data the GDAL/OGR library was used. The area of restriction is set in the KML format. The cartographical projections applied to display of geospatial data are described. The used digital model of terrain (Digital Elevation Model (DEM)) is result of carrying out radar topographical filming (Shuttle radar topographic mission (SRTM)) the most part of the territory of the globe. The data SRTM are organized in the form of the individual rasterized cells, or tile. For training of staff unit, the terrain section suffices usually less than what provides one tile to a surface of SRTM data. The algorithm is developed and according to it the program for data handling of digital model of terrain of which the heightmap of SRTM in Merkator projection is result is realized. For expert monitoring of coincidence, in the raster editor the heightmap is superimposed on the image of a surface. On practical examples coincidence of the imposed image of a picture of an earth surface to the transformed heightmap is shown that confirms a correctness of the described method and its implementation.