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GB/T 45632-2025Digital aerophotogrammetry — Control survey specifications (English PDF)

数字航空摄影测量控制测量规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2025

Implementation date

August 1, 2025

Scope

GB/T 45632-2025 is the English-translated version of 数字航空摄影测量控制测量规范.

GB/T 45632-2025 sets out how the control survey for digital aerial photogrammetry is carried out in China. It fixes the general provisions - mathematical basis, control points, aerial data and instruments - and the preparation stage of data collection, survey area exploration, data analysis and technical design.

It then specifies how image control points are laid out, both in block networks and along a single strip, how they are measured in the field and graphically, and how control results are numbered, tabulated and marked.

It closes with quality control, acceptance of the results and submission of the deliverables. It applies to the control survey stage of digital elevation models, digital surface models, digital orthophoto maps and digital line graphs at scales from 1:500 to 1:50 000. It was issued on 25 April 2025 and has applied since 1 August 2025.

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Document preview — GB/T 45632-2025

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 77

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

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 General
5.1 Mathematical foundations
5.2 Basic control points
5.3 Image Control Point
5.4 Aerial data
5.5 Instruments and Equipment
6 Preparation
6.1 Data Collection
6.2 Survey area exploration
6.3 Data Analysis
6.4 Technical Design
7 Image Control Point Layout
7.1 Layout
7.2 Layout regulations
7.3 Regional network layout
7.4 Single route layout
8 Image control point measurement
8.1 Field Image Control Point Measurement
8.2 Graphical image control point measurement
9 Control results record and mark
9.1 Control point number and results table
9.2 Control point marking
9.3 Control Points
10 Quality Control
10.1 Basic Provisions
10.2 Process Quality Control
10.3 Quality Inspection and Acceptance of Results
11 Results collation and submission
11.1 Results Summary
11.2 Results Submission
Appendix A (Informative) Control Point Results Table
Appendix B (Informative) Control Points
Reference

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Introduction

At present, the entire process of digital aerial photogrammetry technology from aerial photography, control measurement, aerial triangulation to digital surveying and mapping results production has been extensively studied.

The process is based on digital images. Digital aerial photogrammetry uses digital aerial cameras, global navigation satellite systems, inertial measurement units, internal Digital aerial photogrammetry technology has matured and has become an important method for producing surveying and mapping results.

It has been widely used in surveying and mapping, urban construction, land and engineering, and other fields. In addition, the current digital aerial photogrammetry generally adopts global navigation.

Satellite systems, positioning and attitude measurement systems, and inertial measurement units assist digital aerial photography to achieve rare ground-controlled mapping.

This document is to standardize the current digital aerial photogrammetry control measurement production technology and support digital aerial It is formulated for photogrammetric control measurement work to promote the application of digital aerial photogrammetry technology.

This document is consistent with GB/T 27919 "Technical Specifications for IMU/GPS-Assisted Aerial Photography" and GB/T 27920.1 "Technical Specifications for Digital Aerial Photography".

GB/T 27920.2 "Digital Aerial Photography Specifications Part 2: Push-broom Digital Aerial Photography" Photography", GB/T 23236 "Digital Aerial Photogrammetry Aerial Triangulation Specification", CH/T 3007.1 "Digital Aerial Photogrammetry Mapping Specification Part 1.1.5001.10001.2000 Digital Elevation Model Digital Orthophoto Map Digital Line Drawing,

CH/T 3007.2 Specification for Digital Aerial Photogrammetry and Mapping Part 2.1.5000 1.10000 Digital Elevation Model Digital Orthogonal Digital Line Drawing of Photogrammetry", CH/T 3007.3 Specification for Digital Aerial Photogrammetry and Mapping Part 3.1.25000 1.500001.100000 digital elevation model digital orthophoto map digital line drawing together to support digital aerial photography survey A series of standards for quantity.

1 Scope

This document specifies the general principles, preparation, image control point layout, image control point measurement, control The results recording and marking, quality control, results compilation and submission, and the corresponding verification methods are described.

This document is applicable to the production of basic geographic information digital results using digital aerial photogrammetry methods at scales of 1.500, 1.1000, 1.2000, 1.5000, 1.10000, 1.25000, 1.50000 digital elevation model, digital surface model, digital orthophoto map, Digital line drawings control the measurement phase of production operations.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 7931 1:500 1:1000 1:2000 Field specification for aerial photogrammetry of topographic maps

GB/T 12341 1:25000 1:50000 1:100000 Field specification for aerial photogrammetry of topographic maps

GB/T 13977 1:5000 1:10000 Field specification for aerial photogrammetry of topographic maps

GB/T 18314 Global Navigation Satellite System (GNSS) Measurement Specification

GB/T 24356 Quality inspection and acceptance of surveying and mapping results

GB/T 27919 Technical Specification for IMU/GPS Assisted Aerial Photography

GB/T 27920.1 Specification for digital aerial photography Part 1: Frame-type digital aerial photography

GB/T 27920.2 Specification for digital aerial photography Part 2: Push-broom digital aerial photography

GB/T 39616-2020 Specification for real-time kinematic measurement (RTK) of satellite navigation and positioning base station network

CH/T 1001 Rules for the preparation of surveying and mapping technical summaries

CH/T 1004 Surveying and Mapping Technical Design Regulations

CH/T 1024 Technical Specification for Quality Inspection of Image Control Measurement Results

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Digital aerial photography

Using aircraft, airships, balloons and other aerial vehicles as platforms, digital aerial cameras are used to take photographs at a height within the Earth's atmosphere. The technology of photographing the earth's surface.

3.2 Digital aerial photogrammetry

Adopting the principle of digital projection intersection, the digital aerial images are corrected and processed to measure the shape, size, spatial position, properties and Technical approach to interrelationships.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

CH/T 1001 · CH/T 1004

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