GB/T 40629-2021 English PDF

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GB/T 40629-2021: Specifications for medium scale public map data
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40629-2021	999	Add to Cart	7 days	Specifications for medium scale public map data	Valid

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Basic data

Standard ID: GB/T 40629-2021 (GB/T40629-2021)
Description (Translated English): Specifications for medium scale public map data
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A76
Word Count Estimation: 50,512
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40629-2021: Specifications for medium scale public map data

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Specifications for medium scale public map data ICS 07.040 A76 National Standards of People's Republic of China Medium-scale public map data specification Released on 2021-10-11 2021-10-11 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Data description 1 4 Basic requirements 2 4.1 Geodetic datum 2 4.2 Data accuracy 2 4.3 Framing number 2 4.4 Current status 2 5 Data organization 2 5.1 File Naming 2 5.2 Data layer 2 5.3 Attribute items and attribute table 2 5.4 Element code and extension 2 6 Overall data requirements 3 6.1 Element representation and accuracy 3 6.2 Directive requirements for elements 3 6.3 Attribute item requirements 3 6.4 Database identification 3 6.5 Edge connection requirements 3 7 Element selection and presentation requirements 3 7.1 Basics of Positioning 3 7.2 Water system 3 7.3 Residential area and facilities 4 7.4 Transportation 4 7.5 Pipeline 5 7.6 Realm and political area 5 7.7 Landform 5 7.8 Soil vegetation 5 7.9 Place names 6 8 Metadata 6 Appendix A (Normative Appendix) Data Layer Table 7 of Scaled Public Map Data Appendix B (Normative Appendix) Attribute Item Definition Table 9 of Scaled Public Map Data Appendix C (Normative Appendix) Attribute Table Structure of Scaled Public Map Data 10 Appendix D (Normative Appendix) Medium-scale public map data element content and selection indicators 13 D.1 Positioning basis 13 D.2 Water system 14 D.3 Residential area and facilities 20 D.4 Transportation 25 D.5 Pipeline 29 D.6 Realm and political area 30 D.7 Landform 32 D.8 Soil vegetation 37 Appendix E (Normative Appendix) Metadata Structure Table of Scaled Public Map Data 40 References 43

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the Ministry of Natural Resources of the People's Republic of China. This standard is under the jurisdiction of the National Geographic Information Standardization Technical Committee (SAC/TC230). Drafting organizations of this standard. National Basic Geographic Information Center, Wuhan University School of Surveying and Mapping, Shaanxi Surveying and Mapping Geographic Information Bureau, Heilongjiang Surveying and Mapping Management Information Bureau, Sichuan Surveying and Mapping Geographic Information Bureau, Hainan Surveying and Mapping Geographic Information Bureau, Chongqing Institute of Surveying and Mapping of the Ministry of Natural Resources. The main drafters of this standard. Wang Guizhi, Liu Jianjun, Qiao Junjun, Wang Donghua, Zhou Xu, Wu Chenchen, Wu Yanping, Sun Hongshuang, Shi Jiangnan, Weng Yanmei, Li Zhaoxiong, Jia Yunpeng, Li Zhao, Du Xiao, Zhang Yuanjie.

Introduction

Medium-scale public map data plays a very important role in economic construction, national defense construction, social development and ecological protection services. The general public’s demand for public map products is increasing and urgent. The National Surveying and Mapping and Geographic Information Administration During the Three Five 1.1000000 and other multi-scale integrated basic geographic information database system, compiled the national 1.1000000 public version of the topographic map system Map data products, and compiled a series of technical solutions and specifications for medium-scale public map data products. In order to unify and standardize the medium-scale public map data products, establish the foundation, authority, integrity, openness and Current situation, conduct demand research and overall design for it from the national level, and further refer to relevant technical standards and specifications, and carry out the ``Medium Proportion The research and compilation of the "Ruler Public Map Data Specification". Medium-scale public map data specification

1 Scope

This standard specifies the content composition, basic requirements, data organization, overall data requirements, element selection, and selection of medium-scale public map data. Represents requirements, metadata, etc. This standard applies to the production, database construction, update and service of medium-scale public map data.

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 reference documents, the latest version (including all amendments) is applicable to this document. GB/T 12341-2008 1.25000 1.50,000 1.100,000 Topographic Map Aerial Photogrammetry Field Specification GB/T 12343.2 National Basic Scale Map Compilation Specification Part 2.1.250,000 Topographic Map Compilation Specification GB/T 13923 Classification and codes of basic geographic information elements GB/T 13989 National Basic Scale Topographic Map Framing and Numbering GB/T 33183-2016 Basic geographic information 1.50,000 topographic feature data specification GB/T 35764 Open map content representation requirements

3 Data description

Medium-scale public map data is based on 1.250,000, and the scale is between 1.100000 and 1.1000000 National basic geographic information data that can be used publicly is an important basic and strategic information resource in the construction of national informatization. The unified positioning foundation and space carrier of geographic elements. This data includes 9 categories such as positioning basis, water system, residential areas and facilities, transportation, pipelines, borders and administrative districts, landforms, soil vegetation, place names, etc. The basic geographic information elements are composed of vector datasets and metadata. The vector datasets include the spatial coordinates and attributes of the basic geographic information elements Information and interrelationships, etc. Metadata is the description of vector data sets. Vector datasets express basic geographic information in the form of points, lines, and polygons Elements. a) There are four representation forms for point elements. label point, anchor point, directed point, and place name anchor point. The marked point means that there is no real in a certain range The expression form of the point element corresponding to the body; the anchor point refers to the expression form of the point element corresponding to the entity; the directed point refers to the directionality The expression form of the point element; the place name anchor point is the expression form of the place name annotation without the entity corresponding to the point element corresponding to the place name The center position of the element, line feature, or polygon feature. b) Line elements are represented in three forms. line, center line, and directed line. Line refers to the line feature or entity contour line (edge) corresponding to no entity The form of expression; the center line refers to the form of expression of the line element corresponding to the entity; the directed line refers to the line element with directionality or symbolization The expression form of element is a line collected in a certain direction. c) There are two representation forms for area elements. contour line facet and range line facet. Contour facets are used to represent faces with well-defined boundaries Features; range line facets are used to represent polygon features without clear boundaries. ......

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