Directional layered household diagram expansion method

Abstract

The invention discloses a directional layered household diagram expansion method, which comprises five steps of extracting the outer contour of the layered household diagram, identifying the outdoor contour points of the child households, classifying and expanding the vertices of the child households' rooms, stretching the top floor of a building, and modeling a three-dimensional building. A method for construct an equidistant parallel line is used to expand a hierarchical household diagram, the directional space expansion and stretching of complex vector planar graphics are realized, To solvethe problems of inaccurate nesting of 3D building model and inclined model and the uneven hierarchy between different floors caused by artificial editing and expansion, optimize 3D visualization effect, improve 3D building modeling efficiency and reduce the consumption of human and financial resources, it has good application value in practical application.

Description

Technical field [0001] The invention belongs to computer graphics technology, and specifically relates to a method for expanding a directional hierarchical household map. Background technique [0002] The house hierarchical household map is an important material for real estate property rights and property registration management. It is used to identify the room number, area, number of floors, and house boundary lines of each real estate unit. Use the hierarchical household map to build a three-dimensional real estate model, superimpose the multi-layer hierarchical household map together, and then generate a three-dimensional model through the stretching operation according to the attribute information of the layer height, and combine the stretched three-dimensional model with the tilt The photographic three-dimensional model is displayed in combination. However, in the actual fitting work, the combination of the 3D real estate model and the inclined photographic 3D model is not...

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the problem that the three-dimensional real estate model and the inclined model do not fit tightly and the visualization effect is not good in the prior art, the present invention provides a method for extending the directional layered household diagram, based on the construction of equidistant parallel lines, judging the front and rear of the vertices The positional relationship and the role played by the vertices in the expansion realize the directional automatic expansion and three-dimensional stretching of the layered household diagram, and solve the problem of human intervention in the actual three-dimensional real estate modeling work. The problem of unevenness improves the visualization effect of the 3D real estate model, reduces the consumption of human and financial resources, and has good application value in practical applications

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