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GB/T 39624-2020Technical specification for underwater topographic survey of airborne lidar (English PDF)

机载激光雷达水下地形测量技术规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 14, 2020

Implementation date

December 14, 2020

Scope

GB/T 39624-2020 is the English-translated version of 机载激光雷达水下地形测量技术规范.

GB/T 39624-2020 is the Chinese standard "Technical specification for underwater topographic survey of airborne lidar".

Its scope clause reads: This standard specifies the basic requirements, preparations, data acquisition, data processing, and results quality inspection of airborne lidar for underwater topographic measurement: Check the results and submit them: This standard applies to the use of airborne lidar measurement technology for underwater topographic survey operations in waters with a depth of not more than 50m:. Its clauses include terms and definitions.

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Document preview — GB/T 39624-2020

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 75

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Basic requirements
5:1 General provisions
5:2 Spatial datum
5:3 Time base
5:4 Projection and Framing
5:5 Schematic symbols
5:6 Point cloud density requirements
5:7 Point cloud plane accuracy
5:8 Point cloud elevation accuracy
5:9 Metadata
6 Preparation
6:1 Demand analysis
6:2 Data collection
6:3 Site survey
6:4 Selection of equipment
6:5 Compilation of technical design documents
7 Data acquisition
7:1 Comprehensive inspection
7:2 Route design
7:3 Data acquisition requirements
7:4 Data acquisition flight
7:5 Data supplement test
8 Data processing
8:1 Data processing flow
8:2 Data collation
8:3 Waveform data processing
8:4 POS data processing
8:5 Point cloud data processing
8:6 Production of results
9 Results quality check
9:1 Quality inspection and acceptance of results
9:2 Inspection of original collection results
9:3 Post-processing results check
10 Arrangement and submission of results
10:1 Requirements for submission of results
10:2 Submission of results
Appendix A (Normative Appendix) Waveform Achievement Metadata
Appendix B (Normative Appendix) Point Cloud Achievement Metadata
Appendix C (Normative Appendix) Calculation Record of Installation Angle
Appendix D (Normative Appendix) Eccentric component measurement record
Appendix E (informative appendix) Example of eccentric component measurement record
Appendix F (Normative Appendix) Flight Record

1 Scope

This standard specifies the basic requirements, preparations, data acquisition, data processing, and results quality inspection of airborne lidar for underwater topographic measurement:

Check the results and submit them:

This standard applies to the use of airborne lidar measurement technology for underwater topographic survey operations in waters with a depth of not more than 50m:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB 12319 Chinese chart scheme

GB 12327 Hydrographic Survey Specification

GB/T 13989 National Basic Scale Topographic Map Framing and Numbering

GB/T 17278 Basic requirements for digital topographic map products

GB/T 18316 Quality Inspection and Acceptance of Digital Surveying and Mapping Results

GB/T 19710 Geographic Information Metadata

GB/T 20257 (all parts) Basic scale map of the country

GB/T 24356 Quality Inspection and Acceptance of Surveying and Mapping Results

GB/T 32067 Schematic legends and symbols of marine elements

CH/T 8023 Airborne Lidar Data Processing Technical Specification

CH/T 8024-2011 Airborne Lidar Data Acquisition Specification

CH/T 9008:2 Fundamental Geographic Information Digital Achievement 1:500, 1:1000, 1:2000 Digital Elevation Model

CH/T 9009:2 Fundamental Geographic Information Digital Achievement 1:5000, 1:10000, 1:25000, 1:50,000, 1:100,000

Digital elevation model

CH/Z9026 Digital Depth Model of Basic Geographic Information Digital Achievement

3 Terms and definitions

The following terms and definitions apply to this document:

3:1

Airbornelidar

It is mounted on an aviation platform and integrates laser radar equipment, GNSS and IMU equipment such as laser detection and ranging systems:

Note: This standard specifically refers to the airborne lidar sounding system used for water depth measurement to obtain the geometric and physical characteristics of the target surface:

3:2

Underwatertopographicalsurvey

The process of comparing underwater landforms and ground features directly with known or indirect quantities using bathymetry:

Note: This standard specifically refers to the acquisition of geometric feature information of underwater topography:

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

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