GB/T 41282-2022 in English
VALIDValidation of fractional vegetation cover remote sensing products
- Issued on:2022-03-09
- Implemented on:2022-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$270.00
$262.00
$262.00
《GB/T 41282-2022植被覆盖度遥感产品真实性检验》由TC327（全国遥感技术标准化技术委员会）归口，主管部门为中国科学院。
Introduction
Analysis of the core content of the standard
This standard systematically standardizes the authenticity verification system of vegetation cover remote sensing products, with the following highlights:
- Term definition: Clarify key concepts such as vegetation cover (0-1 dimensionless value) and relative true value
- Temporal and spatial consistency requirements: Time deviation during vegetation stability period ≤5 days, and during rapid growth period ≤2 days
- Sample stratification: Verify by low (≤0.2), medium (0.2-0.5), and high (＞0.5) coverage
Comparison of verification methods
| Method type | Applicable conditions | Key technology | Accuracy index |
|---|---|---|---|
| Direct verification method | Ground data is available and scale matching | UAV/digital camera photo measurement | RMSE＜0.1 |
| Cross-verification method | Existing verified products | Spatial resampling | Correlation coefficient＞0.85 |
| Indirect verification method | Other vegetation parameter products | NDVI conversion model | MAE＜0.15 |
Technology evolution analysis
This standard innovatively proposes:
- Special treatment for row-sown vegetation: sampling unit needs to be >2 times the row spacing, and the rows are measured separately
- Double-layer measurement of high vegetation: coverage synthesis algorithm for bidirectional photography of the upper and lower canopy (FVC=fup+(1-fup)fdown)
- Spatial-temporal interpolation specifications: clarify the applicable conditions and error control of the linear interpolation method
Implementation suggestions
- Equipment selection: give priority to remote-controlled digital cameras with a field of view of <60°, and the flight altitude of drones ≤100m
- Measurement period: avoid the strong light period at noon, and choose cloudy days or morning and evening for measurement
- Quality Control: The inspection report must include the three core indicators of RMSE, MAE, and R²
- Special Terrain: In mountainous areas, the sample size should be increased and slope and aspect information should be recorded
Sample only — not a preview of GB/T 41282-2022
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