GB/T 32874-2016 in English
VALIDTechnical rules for producing 3D digital surveying and mapping achievements in scale of 1:10000 1:50000 based on airborne InSAR
- Issued on:2016-08-29
- Implemented on:2016-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
$476.00
| Standard No: | GB/T 32874-2016 |
| Document status: | VALID |
| Title in English: | Technical rules for producing 3D digital surveying and mapping achievements in scale of 1:10000 1:50000 based on airborne InSAR |
| Title in Chinese: | 机载InSAR系统测制1:10 000 1:50 000 3D产品技术规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2016-08-29 |
| Implemented on: | 2016-11-01 |
| ICS Classification: | 07.040-Astronomy. Geodesy. Geography |
| Professional Classification: | GB-National Standard |
| Related Keywords: | technical rules
technical requirements radar system performance must meet gjb technical preparation technical design document airborne insar introduction analysis |
| Related Topics: | GBT32874
GB/T 32874-2016 |
《GB/T 32874-2016机载InSAR系统测制1:10 000 1:50 000 3D产品技术规程》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
| Product Type | Resolution Requirements | Elevation Accuracy | Plane Accuracy |
|---|---|---|---|
| 1:10000 DEM | 0.5m Grid | ≤0.5m | - |
| 1:50000 DEM | 2.0m Grid | ≤2.0m | - |
| 1:10000 DOM | 0.5m | - | ≤2.5m |
Key technical requirements
Radar system performance
Must meet GJB 6692 specifications, including: baseline length ≥ 1m, spatial resolution ≤ 0.5m (1:10000), imaging width ≥ 5km and other core parameters.
Corner reflector placement
According to Appendix A, the recommended size for X-band is:
Flat bare ground: 0.3-0.4m (1:10000)
Signal-to-noise ratio needs to be >20dB, verticality error <0.5°
Detailed explanation of the operation process
- Technical preparation: The survey area survey needs to focus on evaluating the shadow/overlap area (accounting for <5%)
- Field work: Control point measurement uses GPS static positioning (E-level accuracy, baseline error ≤20mm)
- In-house processing: Interference phase unwrapping requires a coherence coefficient of >0.95
Implementation suggestions
- The accuracy in difficult areas can be relaxed by 0.5 times, but it needs to be clearly stated in the technical design document
- It is recommended to use the CORS system to measure control points to improve efficiency
- Pay attention to the control of shadow area when making DOM (single image <5%)
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