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Meteorological element interpolation assessment method based on Delaunay triangle network

A technology of meteorological elements and triangular network, which is applied in the field of meteorology and can solve the problem that there is no optimal interpolation.

Inactive Publication Date: 2015-04-01
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] However, among all methods, there is no so-called optimal interpolation

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  • Meteorological element interpolation assessment method based on Delaunay triangle network

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Embodiment Construction

[0019] Enumerate specific embodiment below, the meteorological element interpolation evaluation method based on Delaunay triangulation of the present invention is described in further detail:

[0020] The present invention carries out the interpolation evaluation method experiment of meteorological elements based on Delaunay triangulation network. Meteorological elements such as precipitation, temperature, air pressure, and humidity can be used in the test. The experiment of the present invention adopts the air temperature data representing the whole point observation of each national station from August 13, 2012 to August 22, 2012 in Shaanxi Province, my country. Firstly, the temperature data is regularly sampled, and the Delaunay triangulation network is established by using the two-dimensional convex hull method, and then the temperature value is used to fill the Z coordinate value, and the spatial topology reconstruction of the temperature data is completed; the unit norma...

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Abstract

The invention provides a meteorological element interpolation assessment method based on a Delaunay triangle network. The method is characterized by carrying out specific rule sampling or random sampling on meteorological element data of an area observation station, establishing the Delaunay triangle network of meteorological elements by utilizing a two-dimensional convex hull parallel algorithm, carrying out Delaunay triangle network variable resolution spatial interpolation on the meteorological element data to obtain meteorological element spatial distribution, and carrying out approximate reverse on the meteorological elements in spatial and temporal distribution to obtain meteorological element data in the regional scale. The method in the invention, based on the conventional meteorological element interpolation method, according to the practical application requirements that the spatial interpolation can keep the original observation data to be unchanged and balanced between the efficiency and accuracy, enables the deviation and smoothness of the whole grid to be controlled within a certain threshold range, and thus more accurate meteorological element data can be obtained.

Description

technical field [0001] The invention belongs to the field of meteorology, and specifically refers to a meteorological element interpolation evaluation method based on Delaunay triangulation. Background technique [0002] With the continuous development of meteorology and geographic information system (GIS), interpolation of meteorological elements is widely used in scientific research and engineering practice. Generally, interpolation of meteorological elements is mainly used in situations where the existing meteorological element data cannot fully cover the study area. [0003] There are many different classification methods for interpolation of meteorological elements based on different standards. For example, Nigel M. Waters summarized various classification methods in his article: (1) point interpolation and surface interpolation; (2) global interpolation and local interpolation; (3) precise interpolation and approximate interpolation; (4) Statistical interpolation and...

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Application Information

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IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 毕硕本陈东祺颜坚毕胜杰路明月
Owner NANJING UNIV OF INFORMATION SCI & TECH
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