A method for generating 3D terrain and radar terrain based on s-57 electronic chart data

Abstract

The invention provides a method for generating three-dimensional terrain and radar terrain based on S-57 electronic chart data. First, based on the S-57 electronic chart data and GDEM data, an electronic chart-based elevation vector diagram is generated as a unified data source; Secondly, the elevation vector map is transformed, simplified and textured to generate a 3D terrain model of the scene; finally, on the basis of the elevation vector image, by cutting the data, the radar terrain data is generated and completed at different sampling intervals as needed. Extraction of water depth data and navigation target data. The invention overcomes the deficiencies of inconsistent data matching, low precision and poor operation efficiency of the existing terrain model data; integrates the three-dimensional terrain data generation technology, the GPS positioning technology and the GIS geographic information technology, while ensuring the operation efficiency and fidelity of the three-dimensional visual scene, Accurate matching of visual 3D terrain data, radar terrain, water depth data and navigation object data with electronic charts is realized.

Description

technical field [0001] The invention relates to a method for generating three-dimensional topography and radar topography, in particular to a method for generating three-dimensional topography and radar topography for navigation simulators based on large-scale and high-precision matching of S-57 electronic chart data. Background technique [0002] In recent years, with the continuous development of the application of virtual reality technology, it has been successfully applied in urban construction, education, e-commerce, military industry and other fields. Among them, domestic scientific research institutions and colleges have independently developed a ship manipulation simulator with three-dimensional vision, which has played an important role in crew training and port and navigation design demonstrations. [0003] In the development and application of the virtual reality technology of the ship maneuvering simulator, the data extraction of 3D visual terrain, radar terrain,...

AI Technical Summary

Problems solved by technology

Due to the rough description of the land terrain elevation data in the electronic chart, there is a big difference between the data provided in the simulation process and the actual environment

Furthermore, this method does not provide continuous, precise data for the area between contours and isobaths

These all affect the objectivity and fidelity of the simulation data

[0006] (2) The DEM elevation data generated by this method not only meets the accuracy requirements, but also results in a substantial increase in the number of terrain surfaces

For large-scale scenes, the terrain model generated by this method must be imported in blocks, which affects the efficiency of scene rendering and increases the demand for hardware

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