A forest land monitoring and evaluation method and system of multi-source data

CN120370284BActive Publication Date: 2026-06-26SHENZHEN ACAD OF ENVIRONMENTAL SCI
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN ACAD OF ENVIRONMENTAL SCI
Filing Date
2025-04-15
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies for assessing chlorophyll content using lidar data ignore the differences between different height ranges and canopy layers, resulting in insufficient accuracy and reliability of the assessment results. This is especially true in cases where forest spatial structure is complex and tree density is high, making it difficult to accurately assess the chlorophyll content in different areas of the forest.

Method used

Point cloud data is collected by installing lidar equipment, preprocessed, and then divided into height intervals along the vertical z-axis. The canopy outline is calculated, the void feature layer is screened out, a symmetric distance matrix is ​​constructed, the fractal dimension is calculated, and the chlorophyll content is evaluated by combining the light source intensity and the fractal dimension.

Benefits of technology

It enables precise assessment of chlorophyll content in different areas and at different heights of forest land, improving the accuracy and reliability of assessment results. It can identify differences in forest land health status and photosynthetic efficiency, especially in densely wooded and spatially complex forests.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120370284B_ABST
    Figure CN120370284B_ABST
Patent Text Reader

Abstract

The application discloses a kind of forest land monitoring evaluation method and system of multi-source data, which comprises the following steps: collecting point cloud data and pretreatment by installing laser radar equipment on forest land;Point cloud data is divided into height interval in vertical direction z axis, and canopy profile is calculated;The overlapping area ratio is calculated by the canopy profile between each adjacent layer, and the gap characteristic layer is screened out by the overlapping area ratio;The point cloud of dense area in the gap characteristic layer is sampled, and a symmetric distance matrix is constructed;The fractal dimension is calculated based on the point cloud distance in the symmetric distance matrix;The light source intensity of canopy penetration is calculated by fractal dimension;The chlorophyll content is calculated by light source intensity and fractal dimension;The chlorophyll content of different height intervals of the same single tree of forest land is compared by the chlorophyll content of the height interval, so as to obtain the evaluation result of chlorophyll content between different regions of forest land.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Fruit tree canopy lighting effect evaluation method and application

    CN116645604A

  • System and method for monitoring forest gap using lidar survey data

    US20220198749A1