In this paper, a three-dimensional error model of grid digital elevation model (DEM) is proposed based on the reconstructed contours. Though analyzing the construction of three-dimensional error model, the paper disassembles the three-dimensional error to a series of triangular pyramids and quadrangular pyramids, and it can make the calculation simpler. The three-dimensional error is continuous...

In interferometric synthetic aperture radar (InSAR) processing, simulation of interferogram is a common practice. It is used as synthetic data to test and validate the whole chain of InSAR processing from the interferogram creation to the DEM reconstruction. The objective of this paper is to develop a simulator for validation of geocoding processing and phase-to-height conversion processing alg...

We provide a survey of recent results on model calibration by Optimal Transport. present the general framework and then discuss local, local-stochastic, volatility models to European options, joint VIX/SPX problem as well some path-dependent options. explain numerical algorithms examples both synthetic market data.

The objective of the research was to model water quality using the Soil and Water Assessment Tool (SWAT) interfaced with ArcView GIS. SWAT requires the integration of a range of GIS data layers; digital elevation model, soil types, land use, stream networks, water quality monitoring sites, point pollution sources and climatic observations. Prior to modeling water quality with SWAT, ArcView was ...

The DEM generalization is the basis of multi-dimensional observation, the basis of expressing and analyzing the terrain. DEM is also the core of building the Multi-Scale Geographic Database. Thus, many researchers have studied both the theory and the method of DEM generalization. This paper proposed a new method of generalizing terrain, which extracts feature points based on the tree model cons...

We summarize and numerically compare two approaches for modeling and simulating the dynamics of dry granular matter. The first one, the discrete-element method via penalty (DEM-P), is commonly used in the soft matter physics and geomechanics communities; it can be traced back to the work of Cundall and Strack [P. Cundall, Proc. Symp. ISRM, Nancy, France 1, 129 (1971); P. Cundall and O. Strack, ...