Circular No. 06/2020/TT-BTNMT Issuing National Technical Standards on Basic Geographic Information Standards

CIRCULAR

ISSUING NATIONAL TECHNICAL REGULATION ON BASIC GEOGRAPHIC INFORMATION STANDARDS

On the basis of Pursuant to the Law on Standards and Technical Regulations dated June 29, 2006;

On the basis of Law on Surveying and Mapping dated June 14, 2018;

Decree No. 127/2007/NĐ-CP dated August 1, 2007 of the Government detailing implementation of certain provisions of the Law on Standards and Technical Regulations;

Decree No. 67/2009/NĐ-CP dated August 3, 2009 of the Government amending and supplementing certain provisions of Decree No. 127/2007/NĐ-CP dated August 1, 2007 of the Government detailing implementation of certain provisions of the Law on Standards and Technical Regulations; Decree No. 78/2018/NĐ-CP dated May 16, 2018 of the Government amending and supplementing certain provisions of Decree No. 127/2007/NĐ-CP dated August 1, 2007 of the Government detailing implementation of certain provisions of the Law on Standards and Technical Regulations;

Decree No. At the proposal of the Director of the Vietnam National Administration of Surveying, Mapping and Geographic Information, the Head of the Legal Department, and the Head of the Science and Technology Department;

Decree No. Decision No. 36/2017/NĐ-CP dated April 4, 2017 of the Government stipulating functions, tasks, powers, and organizational structure of the Ministry of Natural Resources and Environment;

At the proposal of the Director of the Vietnam National Survey, Mapping and Geographical Information Center, the Head of the Science and Technology Department, and the Head of the Legal Affairs Department;

The Minister of Natural Resources and Environment issues this Circular to issue the National Technical Regulation on Basic Geographic Information Standards.

Article 1. Attached herewith is the National Technical Regulation on Basic Geographic Information Standards, code QCVN 42: 2020/BTNMT.

Article 2. Effectiveness

1. This Circular takes effect from March 1, 2021.

2. Circular No. 02/2012/TT-BTNMT dated March 19, 2012 stipulating the National Technical Regulation on Basic Geographic Information Standards ceases to be effective from the date this Circular takes effect.

Article 3. Transitional Provisions

1. Projects, programs, technical designs approved before the date this Circular takes effect shall be implemented according to the provisions of Circular No. 02/2012/TT-BTNMT dated March 19, 2012 stipulating the National Technical Regulation on Basic Geographic Information Standards. In cases where the technical content of such projects, programs, and technical designs does not comply with the provisions of this Circular, the technical content must be adjusted in accordance with the provisions of this Circular prior to acceptance.

2. Projects, programs, and technical designs that have not been approved before the date this Circular takes effect shall be implemented according to the provisions of this Circular.

Article 4. Implementation

1. The Director of the Vietnam National Mapping, Cartography and Geographical Information Center is responsible for organizing guidance and implementation of this Circular.

2. Ministries, ministerial-level agencies, government agencies, provincial People's Committees under the central government, and related organizations and individuals are responsible for implementing this Circular.

3. During the implementation process, if there are any difficulties, relevant agencies, organizations, and individuals are requested to promptly report to the Ministry of Natural Resources and Environment for consideration and decision. /.

QCVN 42: 2020/BTNMT

NATIONAL TECHNICAL REGULATION ON BASIC GEOGRAPHIC INFORMATION STANDARDS

National technical regulation on basic geographic information

(Attached to Circular No. 06/2020/TT-BTNMT dated August 31, 2020 of the Minister of Natural Resources and Environment)

Foreword

QCVN 42: 2020/BTNMT was compiled by the Vietnam National Mapping, Cartography and Geographical Information Center, reviewed by the Department of Science and Technology, and approved by the Ministry of Natural Resources and Environment pursuant to Circular No. 06/2020/TT-BTNMT dated August 31, 2020 of the Minister of Natural Resources and Environment.

QCVN 42: 2020/BTNMT replaces QCVN 42: 2012/BTNMT issued together with Circular No. 02/2012/TT-BTNMT dated March 19, 2012 of the Minister of Natural Resources and Environment.

NATIONAL TECHNICAL REGULATION ON BASIC GEOGRAPHIC INFORMATION STANDARDS

National technical regulation on basic geographic informationFor power plants invested under the Build-Operate-Transfer (BOT) model, n is determined according to the operational period of the power plant stipulated in the BOT contract.

This technical regulation sets out technical requirements, testing methods, sampling procedures; management requirements; responsibilities of organizations and individuals producing, trading, and importing cigarettes.

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This technical regulation specifies the application of the following basic geographic information standards:

1.1. Data structure model standard.

1.2. Spatial data concept model standard.

1.3. Temporal data concept model standard.

1.4. Geographic object cataloging method standard.

1.5. Coordinate reference system standard.

1.6. Geographic metadata standard.

1.7. Geographic data quality standard.

1.8. Geographic data presentation standard.

1.9. Geographic data exchange encoding standard.

Thông tư này áp dụng đối với tổ chức, cá nhân có liên quan đến hoạt động kinh doanh đối tượng thủy sản nuôi chủ lực trên lãnh thổ Việt Nam.

This technical regulation applies to management agencies, organizations, and individuals involved in the development and application of geographic data.

In this technical regulation, the following terms are understood as follows:

In this technical regulation, the following terms are understood as follows:

3.1. XML (eXtensible Markup Language - Extended Markup Language) is a set of rules for encoding documents and data in a format that can be read by both humans and computers. XML is often used for data exchange purposes.

3.2. GML (Geography Markup Language - Extended Geography Markup Language) is an XML-based language used to describe, store, and exchange geographic data.

3.3. UML (Unified Modeling Language) - Unified Modeling Language is a modeling language using graphic symbols and object-oriented methods to describe part or all of software with business models from different levels of abstraction.

3.4. XML schema: describes the structure of an XML document including elements and attributes within the document, the order and number of child elements, and the data types of elements and attributes.

3.5. Base GML schema: is an XML schema comprising a finite set of components from GML.

3.6. Application GML schema: is a conceptual schema for geographic data tailored to the requirements of one or more specific applications.

3.7. Geographic metadata: is data describing the characteristics of data within a geographic database. Geographic metadata is also known as descriptive geographic data.

3.8. Conceptual model: is a model used to define concepts in the world, including both the real and abstract worlds.

3.9. Conceptual schema: is a description of a conceptual model in a specific language.

3.10. Geographic object: is a physical entity or phenomenon in the real world or a description of an object or phenomenon that does not exist in the real world at a specific geographic location on land, underground, water surface, underwater, seabed, or airspace.

3.11. Abstract geographic object class: is a geographic object class not represented by specific objects in the dataset but expressed through inheritance classes.

3.12. Geographic object type: is a collection of similar geographic objects sharing common attributes and relationships.

3.13. Geographic object relationship: is a relationship describing the connection between geographic objects of the same or different types.

3.14. Geographic object attribute: is information describing specific characteristics of a geographic object.

3.15. Geographic object catalog: is a collection of groups of geographic objects constructed according to the geographic object catalog conceptual model and compatible with the application schema.

3.16. General geographic object model: is a model describing concepts used to define geographic objects.

3.17. National basic geographic object catalog: is a catalog of geographic objects comprising basic information (name, code, description, attributes) for application and expansion when building specific types of geographic object catalogs.

3.18. Meta-model: is a model defining the language used to describe other models.

3.19. Base parameter system: is a set of basic parameters used as a basis for calculating other parameters.

3.20. Coordinate reference system: is a coordinate system related to an object (usually Earth) through a set of parameters defining the position of the origin point, scale, and orientation of the coordinate system (this set of parameters is called datum).

3.21. Time reference system: is a reference system based on which time is measured.

3.22. Geographic data presentation diagram: is a diagram describing how geographic data is represented graphically.

3.23. Geographic object presentation rules: are rules applied to a type of geographic object in an application diagram indicating ways to represent that type of geographic object graphically.

3.24. Geographic object presentation catalog: is a collection of geographic object presentation rules.

3.25. Presentation directive: is a set of necessary presentation operations corresponding to each specific presentation rule.

3.26. Presentation operation: is the method applied to handle the presentation of geographic data for a specific case.

3.27. Presentation service: is specific presentation operations for geographic data.

3.28. Encoding: is the representation of information (data, objects...) in a defined coding system.

3.29. Primitive geometric object: is single and uniform geometric objects that cannot be divided further (for example: point, line, area).

4. Symbols and terms used in conceptual diagrams

Symbols and terms used in conceptual diagrams are specified and explained in Appendix A issued together with this national technical regulation.

II. TECHNICAL PROVISIONS

1. Standard for geographic data structure model

1.1. Language for representing the geographic data structure model.

1.1.1. Use UML language to represent conceptual diagrams and application diagrams in defining basic geographic information and other types of geographic information.

1.1.2. The limitations of applying UML in defining the geographic data structure model are specifically stipulated in Section 1 of Appendix B issued together with this national technical regulation.

1.2. The following primitive data types are applied when defining the geographic data structure model:

a) Number data type;

b) Integer data type;

c) Real number data type;

d) Character string data type;

e) Time data type;

f) Date-time data type;

g) Boolean data type.

1.3. General geographic object model.

1.3.1. The general geographic object model is used to model the basic characteristics of geographic object types for the purpose of: Classifying and defining geographic object types in the geographic object catalog or in the application diagram; Specifying the structure and content of the geographic object catalog; Specifying the geographic data presentation diagram.

1.3.2. The basic characteristics of geographic object types include: Name of the geographic object type; Definition or description of the geographic object type; Attributes of the geographic object type; Relationships; Generalization and specialization relationships.

1.3.3. The general geographic object model is specifically stipulated in Section 2 of Appendix B issued together with this national technical regulation.

1.4. Rules for constructing application diagrams.

1.4.1. Rules for constructing application diagrams are applied to: Describe geographic object types defined according to the general geographic object model; Define data structure in an application diagram; Construct application diagrams for various types of geographic data.

1.4.2. Naming rules for application diagrams (including name and version) are stipulated in Section 3.1 of Appendix B issued together with this national technical regulation.

1.4.3. Rules for preparing documentation describing application diagrams are stipulated in Section 3.2 of Appendix B issued together with this national technical regulation.

1.4.4. Rules for describing the relationship between application diagrams and other conceptual diagrams are stipulated in Section 3.3 of Appendix B issued together with this national technical regulation.

1.4.5. Rules for defining spatial attributes, temporal attributes, and other attributes (collectively referred to as thematic attributes) of geographic object types in application diagrams are stipulated in Section 3.4 of Appendix B issued together with this national technical regulation.

1.4.6. Rules for describing geographic object types defined according to the general geographic object model using UML in application diagrams are stipulated in Section 3.5 of Appendix B issued together with this national technical regulation.

1.4.7. Rules for using the geographic object catalog when constructing application diagrams are stipulated in Section 3.6 of Appendix B issued together with this national technical regulation.

2. Standard for spatial data concept model

2.1. The standard for spatial data concept model is applied for the following purposes:

a) Unify spatial models used to describe the spatial attributes of geographic objects;

b) Define spatial attributes for geographic data types in application diagrams.

2.2. The spatial data concept model is composed of two component concept models as follows:

a) Geometric spatial concept model is the spatial information model of geographic objects described by geometric object types and is detailed in Section 1 of Appendix C issued together with this national technical regulation;

b) Topological spatial concept model is the spatial information model of geographic objects described by topological object types and is detailed in Section 2 of Appendix C issued together with this national technical regulation.

3. Standard for temporal data concept model

3.1. The standard conceptual data time model is applied for the purpose of standardizing time data models to describe the temporal attributes of geographic objects; Defining the temporal attribute for geographic data types in the application schema.

3.2. The conceptual data time model consists of two UML packages, one package for describing temporal object types and another package for describing the temporal reference system.

3.3. The conceptual data time model is specified in Section 1 of Appendix D issued together with this national technical regulation.

3.4. The temporal geometric object is specified in detail in Section 2 of Appendix D issued together with this national technical regulation.

3.5. The temporal topological object is specified in detail in Section 3 of Appendix D issued together with this national technical regulation.

4. Standard method for compiling a geographic object catalog

4.1. The standard method for compiling a geographic object catalog is applied to build a geographic object catalog for various types of geographic data; To establish a geographic object catalog database for various types of geographic data to provide information catalog services.

4.2. Geographic object types in the geographic dataset must have complete definitions and descriptions.

4.3. Name all geographic object types, the attributes of geographic objects, and the relationships linking geographic objects in the geographic object catalog according to the principle that names must be unique.

4.4. Provisions regarding definitions in the geographic object catalog.

4.4.1. Use Vietnamese as the official language for defining geographic object types, geographic object attributes, relationships linking geographic objects, and other related descriptions.

4.4.2. There must be specific definitions for: Geographic object type, geographic object attribute, value range of each geographic object attribute, relationships linking geographic objects.

4.4.3. In cases where a definition already exists in another document, it may be used directly and the reference document should be cited.

4.5. Provisions concerning geographic object types in the geographic object catalog.

4.5.1. Each geographic object type must be defined according to the provisions of Point 4.4 of this Article.

4.5.2. Each geographic object type must have a name and be assigned a unique code (the code may include both characters and numbers).

4.5.3. If a geographic object type participates in relationships linking geographic objects, its role in such relationships must be indicated.

4.6. Attributes of geographic objects (if any) must be defined, named, and have a determined value range.

4.7. Relationships linking geographic objects (if any) must be defined and named.

4.8. Detailed provisions on the information required in a geographic object catalog.

4.8.1. Information required in a geographic object catalog is specified in the conceptual model of the geographic object catalog and detailed in Section 1 of Appendix E issued together with this national technical regulation.

4.8.2. Apply the conceptual model of the geographic object catalog to compile the national geographic base database catalog as specified in Section 2 of Appendix E issued together with this national technical regulation.

4.9. Provisions on principles for compiling a geographic object catalog when establishing various types of geographic databases.

4.9.1. The geographic object catalog of the national geographic base database of various types must be established based on the National Base Geographic Object Catalog as specified in Appendix G issued together with this national technical regulation. The National Base Geographic Object Catalog includes geographic objects and their attributes at a basic level of detail. Depending on the level of detail of the national geographic base database of different scales, appropriate geographic objects and attributes from the National Base Geographic Object Catalog should be selected or supplemented accordingly.

4.9.2. When compiling specialized geographic object catalogs to serve the establishment of various types of specialized geographic databases, the principles stipulated in Points 4.1 to 4.8 of this Article must be followed.

5. Standard coordinate reference system

5.1. The standard coordinate reference system is applied to describe in detail the coordinate reference system used when building geographic databases.

5.2. The coordinate reference system model is described through a conceptual model, detailed in Section 1 of Appendix H issued together with this national technical regulation.

5.3. Information describing the coordinate reference system is specified in Section 2 of Appendix H issued together with this national technical regulation.

5.4. Various types of national geographic base databases are built using the National Coordinate Reference System and National Coordinate System VN-2000, with the height reference being the National Height System.

5.5. Provisions on the coordinate reference system code for the National Coordinate Reference System and National Coordinate System VN-2000 are specified in Section 3 of Appendix H issued together with this national technical regulation.

6. Standard geographic metadata

6.1. The standard geographic metadata is applied to build metadata for various types of geographic data, to exchange and provide geographic metadata in various forms.

6.2. Geographic metadata includes the following groups of information:

a) Group of information describing geographic metadata;

b) Group of information describing the coordinate reference system;

c) Group of information describing geographic data;

d) Group of information describing the quality of geographic data;

e) Group of information describing the methods and procedures for distributing geographic data.

6.3. The group of information describing geographic metadata includes general information about the geographic metadata, specifically including the following information:

a) Information about the Vietnamese character set code used in geographic metadata;

b) The scope of geographic data described by geographic metadata;

c) The name of the standard geographic metadata, version number of the standard geographic metadata, and the time of creation of the geographic metadata;

d) Information about the organization creating the geographic metadata.

6.4. The group of information on the coordinate reference system includes information indicating the coordinate reference system used to build the geographic dataset (this group of information does not include information defining the coordinate reference system).

6.5. The group of information describing geographic data includes the following information:

a) Information describing the purpose of use and current status of geographic data;

b) Information on the Vietnamese character encoding scheme used in geographic data;

c) Information describing the spatial-temporal data model used to represent geographic data;

d) Information on types of keywords (selected by the entity responsible for creating the geographic metadata for future information exploitation purposes), topics that the geographic data relate to;

đ) Information on the level of detail and completeness of the geographic data;

e) Information on entities and organizations involved in the process of building, testing, acceptance, usage, etc., of geographic data;

g) Information on the spatial and temporal scope of the geographic data;

h) Information on constraints related to geographic data such as access and data security constraints;

6.6. The quality data information group includes information describing the quality assessment process, general quality evaluation results of geographic data, and quality evaluation results according to specific quality criteria. This group includes the following basic information:

a) Information on the scope of data being quality assessed;

b) Information on the source materials used to build the data;

c) Information describing the methods used to assess data quality;

d) Information describing the overall quality assessment results and quality assessment results for each specific quality criterion;

6.7. The distribution data information group is applied to indicate the method of distributing geographic data to users. This group includes the following basic types of information:

a) Information describing how geographic data are distributed online (through geographic information services) or through intermediaries (through various data storage media);

b) Information describing the format (encoding) of geographic data during distribution;

6.8. Geographic metadata must be encoded in XML;

6.9. Geographic metadata is established at two levels and must be established at least at Level 1;

6.9.1. Level 1: the minimum level, including a set of essential geographic metadata elements serving the purpose of searching geographic data;

6.9.2. Level 2: the extended level, including the geographic metadata elements at Level 1 and other optional geographic metadata elements;

6.10. The structure and content of basic geographic metadata are specified in Appendix I issued together with this national technical regulation;

7. Data Quality Standards

7.1. Data quality standards are applied to establish quality regulations for different types of geographic data and to establish quality assessment processes for different types of geographic data;

7.2. To evaluate the quality of geographic data, apply the following two groups of quality assessment criteria:

7.2.1. Quantitative quality assessment criteria group, specifically defined in Point 2.3 Section 2 of Appendix K issued together with this national technical regulation;

7.2.2. Qualitative quality assessment criteria group, specifically defined in Point 2.4 Section 2 of Appendix K issued together with this national technical regulation;

7.3. To evaluate the quality of geographic data, one of the following two methods may be chosen: Direct data quality assessment method; Indirect data quality assessment method;

7.4. The methods of assessing the quality of geographic data are specifically defined in Section 1 of Appendix K issued together with this national technical regulation;

7.5. The process of assessing the quality of geographic data is specifically defined in Section 2 of Appendix K issued together with this national technical regulation;

7.6. The procedure for preparing reports on quality assessment results is specifically defined in Section 3 of Appendix K issued together with this national technical regulation;

8. Data Presentation Standards

8.1. Data presentation standards are applied to establish a list of presentations for geographic objects for different types of geographic databases;

8.2. When presenting geographic data, the following general principles must be applied:

a) Presentation information of geographic data must be stored separately from the geographic data set;

b) A geographic data set can be presented in multiple ways but must not change the content of the data;

c) Presentation rules applied to each type of geographic object in the application schema are organized and stored in the list of presentations for geographic objects;

d) Presentation directives are organized and stored separately from the list of presentations for geographic objects;

8.3. The data presentation schema is specifically defined in Section 1 of Appendix L issued together with this national technical regulation;

8.4. The list of presentations for geographic data is specifically defined in Section 2 of Appendix L issued together with this national technical regulation;

8.5. The presentation directive for geographic data is specifically defined in Section 3 of Appendix L issued together with this national technical regulation;

8.6. The list of presentations for geographic data is encoded according to the following specific provisions:

8.6.1. Encoding the list of presentations for geographic data is carried out according to the XML schema specifically defined in Section 4 of Appendix L issued together with this national technical regulation;

8.6.2. It is permissible to apply additional OpenGIS presentation technical specifications to develop and encode the list of presentations for geographic data;

9. Data Exchange Encoding Standards

9.1. Data exchange encoding standards are applied to: Establish encoding schemas (such as XML schemas, GML or other schemas) for geographic data; Establish standardization regulations for forms of geographic data exchange; Establish software systems to serve encoding in geographic data exchange;

9.2. General encoding rules describe the rules for mapping data from an input data structure to an output data structure. An encoding rule must specify the following requirements:

a) Encoding requirements include: Application schema, Character encoding table, Metadata about the structure of the data to be encoded, Identification mechanisms and Update mechanisms;

b) The input data structure includes: The data structure used to store data according to an application schema and the relationship between the application schema and the data structure used to store data;

c) The structure of the output data is determined according to the standard encoding in geographic data exchange;

d) Conversion rules include provisions on the method of converting from data in the input data structure to data in the output data structure;

đ) Provide typical examples illustrating the encoding rules.

9.3. Encoding rules according to XML.

9.3.1. Conversion rule from a UML package describing an application schema to an XML schema.

9.3.2. Conversion rule from UML classes for different classification patterns to an XML schema.

9.3.3. Conversion rule from the relationship between UML classes in the application schema to an XML schema.

9.3.4. Conversion rule from the inheritance relationship between UML classes in the application schema to an XML schema.

9.3.5. Conversion rule from the dependency relationship between UML packages in the application schema to an XML schema.

9.4. Application schemas of GML and encoding rules according to the GML language.

9.4.1. Application schemas of GML for types of geographic data are built based on the base GML schema specified in Appendix M issued together with this national technical regulation.

9.4.2. Application schemas must be developed according to the rules specifically stipulated in Appendix N issued together with this national technical regulation.

9.4.3. UML application schemas must be converted to GML application schemas as specifically stipulated in Appendix O issued together with this national technical regulation.

8.2. Domestic-produced TNP1 explosive must declare compliance according to Circular No. 28/2012/TT-BKHCN dated December 12, 2012, issued by the Minister of Science and Technology regarding declaration of conformity to standards and technical regulations and methods of conformity assessment (hereinafter referred to as Circular No. 28/2012/TT-BKHCN) and Circular No. 02/2017/TT-BKHCN dated March 31, 2017, issued by the Minister of Science and Technology amending and supplementing certain provisions of Circular No. 28/2012/TT-BKHCN dated December 12, 2012, issued by the Minister of Science and Technology regarding declaration of conformity to standards and technical regulations and methods of conformity assessment (hereinafter referred to as Circular No. 02/2017/TT-BKHCN).

1. Conformity assessment method

Use Method 1: Testing typical samples to assess conformity. The content and sequence of implementing the main activities in Method 1 are carried out according to Section I of Appendix II on Content, Sequence, and Principles of Using Conformity Assessment Methods (issued together with Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and Technology).

2. Provisions on declaration of conformity

Products that need to be declared conforming are national geographic database bases, specialized geographic databases. Declaration of conformity is based on the results of self-assessment of conformity by the organization or individual declaring conformity. Measurement/testing results for declaration of conformity must be conducted at designated or recognized testing laboratories according to current regulations.

3. Responsibility for declaration of conformity

3.1. Organizations, enterprises, individuals providing have the responsibility to declare conformity for products of databases they themselves invest in.

3.2. Management agencies of national geographic database bases, specialized geographic databases have the responsibility to declare conformity for products they manage and build.

3.3. Declaration of conformity is implemented according to Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Ministry of Science and Technology and Circular No. 02/2017/TT-BKHCN dated March 31, 2017 of the Minister of Science and Technology amending and supplementing some articles of Circular No. 28/2012/TT-BKHCN dated December 12, 2012.

4. Testing methods

4.1. Use methods and tools to extract XML, GML packages of geographic databases implemented by organizations or individuals.

4.2. Check design documents of UML schemas, database structure models, metadata, geographic object catalogs, data presentation catalogs, data quality, XML, GML data exchange formats according to technical criteria as stipulated in Part II.

4.3. If the technical criteria in Part II are not met, conclude non-conformity with the standard.

5. Transition conditions

5.1. Projects, designs approved before the effective date of this Standard shall be implemented according to the provisions of QCVN 42:2012; In case the technical content of such projects, designs does not comply with the provisions of this Circular, the technical content must be adjusted according to the provisions of this Technical Regulation before acceptance.

5.2. Projects, designs not yet approved before the effective date of this Standard shall be implemented according to the provisions of this Technical Regulation.

IV. IMPLEMENTATION

1. The National Administration of Surveying, Mapping and Geographic Information (Ministry of Natural Resources and Environment) is responsible for organizing, guiding, and inspecting the implementation of this Technical Regulation.

2. During the implementation of this National Technical Regulation, if there are difficulties, all opinions should be sent to the National Administration of Surveying, Mapping and Geographic Information (Ministry of Natural Resources and Environment) for consolidation and submission to the Minister for consideration and decision.