Automation of initial data input in the program package ERA-DD for solving two-dimensional boundary value problems on quasi-structures grids. We describe a graphical user interface of the program package ERA-DD for the input and editing of initial data for a two-dimensional boundary value problem. The boundary of the calculation domain is approximated by straight line segments and circle arches. Information about the boundary is imputed both graphically and numerically. A special quasi-structured grid is constructed in order to solve the boundary value problem with the help of the domain decomposition method without overlapping subdomains. We propose an algorithm for constructing the quasi-structured grid.

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