Method for obtaining seabed terrain data based on discrete elevation and adaptive mixed weighting

The invention provides a method for processing seabed terrain data based on discrete elevation and adaptive mixed weighting. The method comprises the steps of: dividing the horizontal plane of seabed terrain into uniform grids; taking the top points of the grids as control points, wherein the height from each control point to the horizontal plane is elevation data of a read-in digital chart, and the heights of these control points are stored in a three-dimensional array; according to elevation points, firstly calculating basic sub-point reference data by using methods of weighting interpolation and weighting extrapolation, then dynamically calculating new sub-points by using a mixed weighting dynamic correction method, finally performing dynamic scheduling according to an adaptive LOD (Level Of Detail) interpolation correlation table model; establishing a curved surface passing through all the points of all the LOD layers to generate the seabed terrain; and finally attaching textures onto the curved surface t