We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Social disaster evaluation model based on submerge GIS and DEM.
- Authors
Hongbiao Xie
- Abstract
According to the accuracy of submerge DEM algorithm is low in disaster evaluation of high resolution GIS images, this paper proposes a flood evaluation model based on optimization of hybrid wavelet transform threshold DEM. First, we introduce wavelet transform algorithm, and discretize the variables of the transform domain, to eliminate the redundant transform. And then we design a kind of program with balance between soft and hard threshold, add adaptive threshold factor in estimator, and the standard threshold of wavelet transform algorithm is optimized. Finally, we make the energy of the original submerge DEM flood algorithm focus on the high frequency coefficient of the greater threshold value covered within the scope, so that can maximum extract the local characteristics in the spatial domain within the scope of frequency domain. Simulation experiments show that compared with the standard submerge DEM algorithm, the proposed flood evaluation model based on optimization of hybrid wavelet transform threshold submerge DEM has the higher accuracy is in disaster assessment of the high resolution of image GIS.
- Subjects
GEOGRAPHIC information systems; DISCRETE element method; EMERGENCY management
- Publication
Metallurgical & Mining Industry, 2015, Issue 4, p156
- ISSN
2076-0507
- Publication type
Article