Multi-scale forest dynamic change monitoring method

A dynamic change, multi-scale technology, applied in the application field of remote sensing technology in forestry, can solve the problems of limiting the application scope of the algorithm and unable to reflect the law of dynamic changes of forest time.

Inactive Publication Date: 2015-08-19
HUAZHONG AGRI UNIV
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Problems solved by technology

[0007] (2) Only two periods of images are used, and the growth of vegetation itself has seasonal rules. The data of two single periods must be in the same growth season, which limits the application range of the algorithm.
[0008] (3) The image data of only two time points can only reflect the forest state information during this time period, and cannot reflect the dynamic changes of the forest over time

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  • Multi-scale forest dynamic change monitoring method

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Embodiment Construction

[0085] In order to make it easier for those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0086] (S1) Geometric correction and registration of remote sensing images;

[0087] (S2) Using MODIS time series NDVI data at 1KM resolution in different seasons within a year, to obtain a land cover type map at 1KM resolution;

[0088] (S3) Using the multi-year 1KM resolution land cover map to generate coarse-scale forest vegetation change information;

[0089] (S4) carrying out cloud and shadow mask processing to the TM data of 30M spatial resolution;

[0090] (S5) Construct a forest vegetation characteristic index on the 30m resolution TM image according to the coarse-scale forest vegetation change mask file;

[0091] (S6) Extraction of forest dynamic change information by combining the coarse-scale land cover change map wi...

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Abstract

The present invention discloses a multi-scale forest dynamic change monitoring method. The method comprises carrying out remote sensing image geometric correction and rectification; acquiring a land cover type map with a 1KM resolution ratio by using MODIS time series NDVI data with a 1KM resolution ratio of different seasons within one year; generating a coarse scale land cover changing map by using multiple years of land cover type maps with a 1KM resolution ratio; establishing a coarse scale forest cover change masking file by using a coarse scale land cover changing type map; establishing forest cover characteristic indexes on TM images with a 30 m resolution ratio according to the coarse scale forest cover change masking file; and extracting forest dynamic change information combining the coarse scale land cover changing map and forest characteristic indexes of time series. According to the method provided by the present invention, by using time series remote sensing data with different spatial resolutions, coarse scale land cover to fine scale forest change step-by-step detailed forest dynamic monitoring can be realized in large-area regions, and both monitoring efficiency and monitoring accuracy can be raised.

Description

technical field [0001] The invention relates to a multi-scale forest dynamic change monitoring method, in particular to the technology of multi-scale time series remote sensing data in forest resource dynamic change monitoring, and belongs to the application field of remote sensing technology in forestry. Background technique [0002] Forest vegetation not only provides the most basic material and energy sources for human survival and development, but also plays an important role in maintaining ecological processes and ecological balance, especially in protecting fragile ecosystems, water areas and freshwater resources. effect. Forest natural renewal succession, forest disasters (fires, pests and diseases) and human activities will cause changes in forest vegetation, and the dynamics of forest vegetation directly affect the balance and health of terrestrial ecosystems. The research on the dynamic change of forest can keep abreast of the quantity and quality of forest resour...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/10032
Inventor 佃袁勇黄春波周志翔姚崇怀徐永荣王娣
Owner HUAZHONG AGRI UNIV
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