GB/T 41536-2022 in English
VALIDValidation of land cover remote sensing products
- Issued on:2022-07-11
- Implemented on:2023-02-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 41536-2022土地覆被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 authenticity inspection standard for land cover remote sensing products
Standard technical framework
| Inspection method | Applicable circumstances | Sample requirements | Accuracy index |
|---|---|---|---|
| Direct inspection method | Field verification data or high-resolution images | Three-level sampling samples ≥380 | Overall accuracy, type accuracy, uncertainty |
| Indirect inspection method | Refer to verified products of the same resolution | Not lower than the accuracy of the product to be inspected | Parameter analysis based on existing verification |
Note: The three-pixel rule sampling needs to match the accurate spectral characteristics of the ground objects. For details, see Chapter 5.2.3 Sampling Design Requirements
Category Accuracy Improvement Plan
Wetland Classification Verification Case: A 5×5km group sample was used for verification in the alpine meadow ecotone (see C.3 Verification Report Example for details)- Sentinel-2 images were used to assist spot7 image interpretation
- The error of hybrid pixel deep learning modeling was reduced by 12.7%
- The producer accuracy reached 87.23±4.15%
Implementation Points
Temporal Consistency Specification
The reference object collection should be within ±15 remote sensing revisit cycles within the product coverage period. The rainforest area should be moderately relaxed to 30 cycles but a special sampling formula must be submitted.
Geographic matching principle
GF-7 satellite data should be aligned with Landsta-8 images using a strict platform coordinate system interoperability conversion mode:
1. DEM grid is unified to WSG84 coordinates2. Bilinear spectral normalization is implemented
3. Edge matching error ≤ image GSD pixel value
Verification report framework
{{Inspection report information brief table}} Product name: Plateau glacier cover monitoring data adoption method: Secondary direct verification (fuzzy analysis mode) Auxiliary equipment:<b class=instrument>UNIS Radiation Meter</b> Special verification: Weighted test of freeze-thaw zone group samples Output: ReportID_QT867519.dom 
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