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GB/T 41149-2021Specifications for quality requirements and evaluation of fundamental geographic information data (English PDF)

基础地理信息数据质量要求与评定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2021

Implementation date

December 31, 2021

Scope

GB/T 41149-2021 is the English-translated version of 基础地理信息数据质量要求与评定.

GB/T 41149-2021 sets the quality requirements for fundamental geographic information data and the method for evaluating them. The basic requirements cover the spatial reference system, logical consistency, time quality, position accuracy, attribute accuracy, completeness, topology, grid quality and metadata.

Specific requirements follow for vector data, layer by layer - positioning basis, water systems, settlements and facilities, transport, pipelines, boundaries, landforms, vegetation and soil, and place names - and for raster image and grid data.

The quality assessment part gives the quality characteristics, the scoring method, what is scored and how the report is prepared, with a normative annex on the assessment method and an informative example report.

It applies to the inspection, acceptance and quality assessment of such data. It was issued on 31 December 2021 and has applied since 31 December 2021.

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Document preview — GB/T 41149-2021

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

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Basic requirements
4.1 Spatial reference system
4.2 Logical Consistency
4.3 Time Quality
4.4 Position Accuracy
4.5 Attribute Precision
4.6 Integrity
4.7 Topology and Characterization
4.8 Grid quality
4.9 Metadata
5 Vector data quality requirements
5.1 Positioning Basics
5.2 Water system
5.3 Residential Areas and Facilities
5.4 Traffic
5.5 Pipeline
5.6 Realm and Political District
5.7 Landscape
5.8 Vegetation and soil quality
5.9 Place names
6 Raster data quality requirements
6.1 Image data
6.2 Grid data
7 Quality Assessment
7.1 Quality Characterization
7.2 Quality scoring methods
7.3 Content of Quality Score
7.4 Quality assessment methods
7.5 Report preparation
Appendix A (Informative) Data Layer of Basic Geographic Information Data
Appendix B (normative) Basic geographic information data quality assessment method
Appendix C (Informative) Basic Geographic Information Data Evaluation 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 basic requirements for basic geographic information data and the specific quality requirements for vector and raster data and basic geographic information How to assess the quality of data.

This document is applicable to the inspection, acceptance and quality assessment of basic geographic information data.

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 13923 Basic Geographic Information Element Classification and Code

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

GB/T 20257 (all parts) National Basic Scale Map Schema

GB/T 20258 (all parts) Basic geographic information element data dictionary

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

GB 35650 National Basic Scale Map Surveying and Mapping Basic Technical Regulations

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Fundamental geographic information data

As a unified spatial positioning framework and spatial analysis basis, geographic information data reflects and describes the positioning basis, water system, The location, shape and location of natural and social elements such as residential areas and facilities, transportation, pipelines, borders and political districts, landforms, vegetation and soil quality, place names, etc. properties, etc. [Source: GB 21139-2007, 3.1, with modifications]

3.2 Vector data

A general term for graphic data such as spatial points, lines, and surfaces represented by coordinates or ordered coordinate strings, and related attribute data associated with them. [Source: GB/T 14911-2008, 2.63]

3.3 Raster data

A data set that divides geographic space into cells arranged in rows and columns, and each cell has different "values".

NOTE: There are two main types. image - a two-dimensional matrix of regularly spaced elements that make up a pattern; grid - a regular or Near regular inlays. [Source: GB/T 14911-2008, 2.64]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 20257 · GB/T 20258

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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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