Method for simplifying numerical map settlement place polygon by utilizing parametric design model

A technology for designing models and applying parameters, which is applied in the fields of cartography and geographic information engineering, and can solve problems such as inapplicability, inability to feedback and optimize graphics, low level of method adaptability and reusability, etc.
CN101930483BInactive Publication Date: 2012-07-04THE PLA INFORMATION ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE PLA INFORMATION ENG UNIV
Publication Date
2012-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for simplifying a numerical map settlement place polygon by utilizing a parametric design model and effectively solves the problem of enabling the whole simplification process to accurate and quantitative, and ensuring good simplification effect. The method comprises the following steps: presetting the numeric area of the target function corresponding to the initial threshold value integrated digital model and simplification result quality and contribution weight; identifying the graph feature of the settlement place polygon, using coordinate monotonicity to identify local extremum point and basic bending, using adjacent edge vector multiplication cross to identify concavity of direction and culmination of the settlement place polygon; using gradual imaging simplification method to carry out primary simplification on the polygon and building the corresponding supergraph model to obtain the value of corresponding target culmination of each constrained edge in the model; using a mathematical model corresponding to the parametric design model to carry out constrained analysis on the constrained culmination, and constantly repeating iteration to obtain the final result. With coordinate data output by the computer, various settlement places can be simplified, and production efficiency and product quality of the numerical map can be improved.
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Description

1. Technical field

[0001] The invention relates to the fields of map drawing and geographic information engineering, in particular to a method for simplifying residential polygons of digital maps by using parametric design models in digital maps and GIS (Geographic Information System, the same below). 2. Background technology

[0002] The simplification and generalization of residential polygons is the main content of map synthesis research, and it plays a very important role in the multi-scale expression of GIS. Domestic and foreign scholars have done a lot of fruitful work on the simplification of a single residential polygon. From the perspective of data structure, the more representative methods mainly include: the simplification method based on the vector data structure, the mixture of vector and raster The simplification method and the simplification method based on raster data structure. The simplification method based on the raster data structure is generally only s...

Claims

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