Method for building and digitally expressing grassland vegetation subtypes

A vegetation subtype and grassland vegetation technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of not establishing a reliable digital method, lack of naming principles and methods for vegetation subtypes, etc., and achieve a simple and convenient digitalization process. , Improve investigation efficiency, select flexible effects

Active Publication Date: 2014-12-17
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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Problems solved by technology

[0003] At present, there are many researches on the visualization and digitalization of grassland types, subtypes, and types at the large-scale level. Digital grassland distribution maps and their attribute databases at the le...

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  • Method for building and digitally expressing grassland vegetation subtypes
  • Method for building and digitally expressing grassland vegetation subtypes
  • Method for building and digitally expressing grassland vegetation subtypes

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The establishment of the grassland vegetation subtype and the digital representation method of the present invention comprise the following steps:

[0031] 1) Mark the survey area, and conduct vegetation survey on the obtained survey sample points.

[0032] Such as figure 1 As shown, the survey area is marked by Google Earth (Google Map), and the vector map of the survey area is obtained by using ENVI4.7 (The Environment for Visualizing Images, a complete remote sensing image processing platform) software, and the survey sample points are marked on the vector map , Obtain vegetation survey sample points by using ArcGIS (Geographic Information System) with latitude and longitude 2" (only as an example, but not limited to this). figure 1 Each dot in represents a survey sample point with an area of ​​1m 2 , to investigate the type, coverage, he...

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Abstract

The invention relates to a method for building and digitally expressing grassland vegetation subtypes. The method comprises the following steps of (1) marking a searched area, and searching vegetation of acquired searching sample points; (2) calculating the plant species dominance degree of vegetation of each searching sample point; (3) according to the plant type and the plant species dominance degree of each searching sample point, judging whether the searching sample points have the same vegetation subtype or not, and when the vegetation subtype is changed, actually measuring the boundary coordinates of different vegetation subtypes to obtain the vector base map of each vegetation subtype in the searched area; (4) building an attribute data table of each vegetation subtype, and drawing the digital vector distribution diagram of each vegetation subtype by adjusting and overlapping transparency of diagram layers; (5) placing the obtained digital vector distribution diagrams of the vegetation subtypes together, and finally generating the digital vector distribution diagram which shows the vegetation subtype distribution in the searched area and the formation and distribution of dominant plants in the vegetation subtypes. The method is widely applied to practical applications, such as research on the evolution of grassland vegetation, agricultural production, grassland vegetation resource monitoring.

Description

technical field [0001] The invention relates to an informatization and digital representation method of grassland vegetation, in particular to an establishment and digital representation method of a grassland vegetation subtype. Background technique [0002] In terms of the classification of grassland types, scholars at home and abroad have proposed dozens of methods in seven categories. Academician Ren Jizhou of my country proposed the famous comprehensive sequence classification system for grasslands. According to this system, grasslands can be divided into: class-based on meteorological factors temperature and precipitation, sub-category-based on soil factors, type-based on vegetation factors, under type According to the characteristics of vegetation, it can be divided into subtype, miniature and so on. Since the beginning of the 21st century, with the widespread application of computer technology, network technology, "3S" technology and geostatistics, the visualization a...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 黄训兵吴惠惠张泽华秦兴虎
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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