High-fidelity digital modeling method for landform altitude

Abstract

The invention discloses a high-fidelity digital modeling method of terrain elevation, the steps are as follows: the first step is to carry out push-broom data acquisition; the second step is to carry out grid segmentation of the acquired vector terrain feature data; the third step is to carry out similar DEM grid data organization of PLA, organization management is carried out to the PLA data after the grid segmentation treatment according to grid data structure; the fourth step is to generate a new digital elevation model file to carry out the seamless embedding of the vector feature data; afeature embedded digital elevation model data structure is composed of three sub-files which comprise a grid file, a feature identification file and a feature file; the grid file is a regular grid data structure; the feature identification file is used for spatial data index of a vector grid integrated organization, the structure thereof is consistent with the current national DEM data structure and only records the grids with the features; the feature file records terrain feature information which is contained in one grid unit, and the information comprises feature points and feature lines.

Description

technical field [0001] The invention relates to a formation technology of a terrain digital elevation model, in particular to a high-fidelity digital modeling method of terrain elevation based on local surface matching terrain data acquisition mode and seamlessly embedded vectorization technology. technical background [0002] Digital elevation model products (Digital Elevation Models, DEM) are the core data products of national spatial basic geographic data, and the core system of GIS for terrain simulation analysis and geoscience analysis. Resource management, planning, tourism and many other fields, for example, in the surveying and mapping department, it is mainly used for 3D terrain modeling, visual domain analysis, engineering earthwork estimation, geometric correction of remote sensing images, etc.; Inundation analysis and other three-dimensional geoscience analysis; in the land and resources department, it is mainly used for detailed inspection of land use types, etc...

AI Technical Summary

Problems solved by technology

The technical process covers two key technical links: push-broom terrain data acquisition technology with local terrain adaptive matching function and grid DEM data structure correction technology based on vector feature data seamless embedding technology. Regional Distortion of Grid DEM Terrain Simulation

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