High-precision riverway flood inundated area generation method for mass DEM (Digital Elevation Model) data
A high-precision, data-based technology, applied in data processing applications, instruments, climate change adaptation, etc., can solve problems such as low computing efficiency, low efficiency, and memory resource consumption, and achieve the goal of improving computing speed, low efficiency, and large compression ratio Effect
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[0055] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.
[0056] figure 1 Shown is a schematic flow chart of one embodiment of the method for generating a high-precision river flood submerged area for massive DEM data according to the present invention, figure 2 An example of DEM data in a certain area is given. The DEM data contains 19719 rows and 19454 columns, the data size is 1.43GB, and the grid width is 25 meters. image 3 is the result map of flood inundation analysis for a given seed point of an inundation source and its submerged water depth, Figure 4 It is a partially enlarged picture, and it can be clearly seen from the picture that there is a "blank" hole formed by the submerged area, which is formed by the submerged island here.
[0057] The embodiment of the present invention is oriented to a high-precision flood submerged area generation met...
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