GB/T 17501-2017 in English
VALIDSpecification for marine engineering topographic surveying
- Issued on:2017-11-01
- Implemented on:2018-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$490.00
$476.00
$476.00
《GB/T 17501-2017海洋工程地形测量规范》由TC283（全国海洋标准化技术委员会）归口，主管部门为自然资源部(海洋)。
Introduction
Core changes in the standard revision
| 1998 Edition | 2017 Edition | Technological evolution |
|---|---|---|
| GPS measurement | Global Navigation Satellite System (GNSS) | Compatible with Beidou and other multi-system positioning |
| Microwave ranging positioning | Polar coordinate positioning/underwater acoustic positioning | Accuracy improved to centimeter level |
| Artificial tide measurement | GNSS tide measurement technology | Real-time water level correction efficiency improved by 40% |
Key Technology Implementation Points
1. Measurement Datum System
The CGCS2000 coordinate system and the 1985 National Height Datum are mandatory. Under special circumstances, a conversion relationship needs to be established:
- The mean error of the weakest point of the plane control network is ≤5cm (1:500 scale)
- The leveling measurement of the tide gauge station must reach the fourth-class accuracy
2. Multi-beam Bathymetry System Operation Specifications
Case: An offshore wind power project uses the Kongsberg EM2040 multi-beam system, through:
- Installation calibration: three-dimensional spatial relationship measurement accuracy ≤1cm
- Sound velocity profile control: collect once every 20km
- Quality control: strip overlap ≥ 10%
3. Coastline definition method
| Coast type | Definition basis | Allowance error |
|---|---|---|
| Sandy coast | Top of beach ridge facing the sea | ≤1.0mm on the map |
| Artificial coast | Boundary line of land and water of structures | Elevation error≤0.2m |
Key differences between the old and new standards
- Appendix formula update: The quadratic temperature term (D.1) is added to the sound velocity correction formula
- Equipment requirements: The sampling rate of the tide gauge is increased from 30min to 10min
- Quality control: Added annual calibration requirements for multi-beam systems
Implementation suggestions
- When establishing a GNSS base station network, multi-frequency receivers such as Trimble R10 should be used first
- Sound velocity profiles should be collected simultaneously for water depth measurement to avoid sound velocity gradient errors
- Combined measurement of side scan sonar + multi-beam should be used for complex seabed terrain
Sample only — not a preview of GB/T 17501-2017
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 34242-2017 in English
Test methods for nanofiltration membranes
2017-09-07 -
GB/T 40215-2021 in English
Code of meteorological observation equipment
2021-05-21 -
GB/T 21983-2020 in English
Warm winter grades
2020-07-21 -
GB/T 17838-2017 in English
Specification for the ships' auxiliary marine hydrology and metereological observations
2017-12-29 -
GB/T 37467-2019 in English
Terminology for meteorological instrument
2019-06-04 -
GB/T 34294-2017 in English
Prevention specification of disasters caused by intense rainfall for rural buildings
2017-09-07 -
GB/T 41339.1-2022 in English
Technical guideline for marine ecological restoration—Part 1: General
2022-03-09
