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GB/T 41451-2022Specifications for indoor space mobile mapping (English PDF)

室内空间移动测量规程

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 15, 2022

Implementation date

April 15, 2022

Scope

GB/T 41451-2022 is the English-translated version of 室内空间移动测量规程.

GB/T 41451-2022 sets the specification for mobile mapping of indoor space. It establishes the procedure of the survey and the requirements of each step: the technical design, the collection and processing of the data, the production of the results, the quality control and the submission of the results.

It applies to indoor space surveys carried out with mobile mapping technology, the backpack and trolley systems that scan a building as the operator walks. Survey institutes, facility managers and the firms that build indoor maps use it. Issued on 15 April 2022, it applies from the same date.

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Document preview — GB/T 41451-2022

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 76

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 Basic requirements
5.1 Space-time benchmark
5.2 Quality Requirements
6 Technical Design
6.1 Requirements Analysis
6.2 Data collection and analysis
6.3 Site Survey
6.4 Technical scheme preparation
7 Data acquisition and processing
7.1 General requirements
7.2 Workflow
7.3 Pre-collection preparation and inspection
7.4 Laser Point Cloud Collection
7.5 Laser Point Cloud Preprocessing
7.6 Point Cloud Storage
7.7 Feature point line extraction
8 Results production
8.1 General requirements
8.2 Production of 2D Surveying and Mapping Results
8.3 Indoor 3D Model Production
8.4 Metadata Production
9 Quality Control
9.1 Quality Control Requirements
9.2 Contents of quality control
10 Results submitted
10.1 Requirements for submission of results
10.2 Submission of results
Appendix A (normative) point cloud achievement metadata
Appendix B (normative) Metadata of 2D Surveying and Mapping Results
Appendix C (normative) 3D model achievement metadata
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 of Standardization Documents" drafted.

1 Scope

This document establishes the procedures for mobile measurement of indoor spaces and specifies the requirements for indoor space measurement based on mobile measurement technology, including technical design requirements in terms of accounting, data collection and processing, production of results, quality control and submission of results.

This document applies to indoor space measurement work using mobile measurement technology.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 4208-2017 Protection class of enclosure (IP code)

GB/T 13923 Basic Geographic Information Element Classification and Code

GB/T 19710 Geographic Information Metadata

GB/T 20257.1 National Basic Scale Map Schema Part 1.1.500 1.1000 1.2000 Topographic Map Schema

GB/T 35636 Specification for Surveying and Mapping of Urban Underground Space

CH/T 1004 Surveying and Mapping Technology Design Regulations

CH/T 9016 Specification for the production of three-dimensional geographic information models

CJJ/T 8 Urban Measurement Specification

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Point cloud

A collection of points distributed in three-dimensional space in a discrete, irregular manner. [Source: CH/T 8024-2011, 3.5]

3.2 Densityofpointcloud

The average number of points per unit area.

Note: Generally expressed in points per square meter. [Source: CH/T 8024-2011, 3.7]

3.3 Point cloud thickness

The discrete value of the laser point cloud in the vertical direction of the same plane is expressed as the thickness of the point cloud in the vertical direction of the same plane.

3.4 Feature point

In the point cloud, it is convenient to identify the selected corner points, intersection points of linear objects, etc.

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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.

Referenced standards

Normative references

GB/T 19710

Similar standards

GB/T 17943-2025|GB/T 18578-2025|GB/T 21740-2025|GB/T 28585-2025|GB/T 45522-2025|GB/T 45631-2025

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