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GB/T 41784-2022Information technology—Real-time positioning—Visual positioning system data interface (English PDF)

信息技术实时定位视觉定位系统数据接口

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 14, 2022

Implementation date

May 1, 2023

Scope

GB/T 41784-2022 is the English-translated version of 信息技术实时定位视觉定位系统数据接口.

GB/T 41784-2022 fixes the data interface between the client and the server of a visual positioning system in China.

It specifies how the interface is composed and how it is called, the four operations GetMetaData, InitPosition, RequestPosition and ClosePosition, and the parameters they exchange, among them the location data, the positioning area and its quality, the camera intrinsic parameters, two-dimensional feature points, image frames and their locations, prior location data and the fault report.

It defines the image, visual positioning, service metadata and the positioning request, and adds informative appendices with the UML notation used and XML examples of the messages. Issued on 14 October 2022, it has applied since 1 May 2023.

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Document preview — GB/T 41784-2022

National Standard of the People's Republic of China

ICS: 35.240.15
Classification: L 70

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 Data interface and calling process
5.1 Interface Composition
5.2 Calling Procedure
6 Interface Definition
6.1 Overview
6.2 GetMetaData (get service metadata)
6.3 InitPosition (initializing positioning data)
6.4 RequestPosition (upload sensor data and get positioning data)
6.5 ClosePosition
7 Parameter definition
7.1 Overview
7.4 AreaQualityInfo (location area quality information)
7.5 LocationData
7.6 Version (version information)
7.7 PositioningArea
7.8 IntrinsicPara (in-camera parameter)
7.9 FeaturePoint2D (two-dimensional feature point)
7.10 ExtendedData (extended data)
7.11 PriorLocationData
7.12 ImageFrame (visual image frame data)
7.13 FrameLocation (image frame location data)
7.14 FaultDetail (abnormal report)
Appendix A (Informative) UML Markup
Appendix B (Informative) Visual Positioning System Data Interface XML Example
B.1 ServiceMetaData in GetMetaData (getting service metadata)
B.2 InitpositioningData in Initposition (initial positioning data)
B.3 SensorData in RequestPosition (upload sensor data and obtain positioning data)
B.6 FaultDetail (abnormal report)
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 specifies the data interface and parameter definitions between the positioning client and the positioning server in the visual positioning system.

This document applies to the system design, development and application.

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 7408-2005 Data Element and Interchange Format Information Exchange Date and Time Representation

GB/T 16831-2013 Coordinate-based standard representation of geographic point locations

GB/T 23705-2009 Code Rules for Place Names/Addresses of Digital City Geographic Information Public Platforms

GB/T 28584-2012 Specification for Construction of Urban Coordinate System

GB/T 30170-2009 Coordinate-based spatial reference of geographic information

GB/T 30288-2013 Satellite Navigation and Positioning Coordinate System

GB/T 35629-2017 Indoor and outdoor multi-mode co-location service interface

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Image

The device acquires a 2D encoded representation of the scene's light sources and color textures.

3.2 Visual positioning

Use visual images to achieve localization.

3.3 Service metadata

Metadata describing the operations and geographic information available on the server. [Source: GB/T 25597-2010, 4.14]

3.4 Positioning request

Request location information from the server.

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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

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