GB/T 40771-2021Representations of 3D features of urban real estate (English PDF)
城市不动产三维空间要素表达
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 11, 2021
Implementation date
October 11, 2021
Scope
GB/T 40771-2021 is the English-translated version of 城市不动产三维空间要素表达.
GB/T 40771-2021 defines how the three-dimensional spatial elements of urban real estate are represented, so that property held above and below ground can be registered and managed in three dimensions.
It sets basic requirements on the mathematical basis, accuracy, data format, units of measurement and the field measurement of boundary points.
It then specifies the expression of spatial information, including geometric and spatial position relationships, and of attribute information through a conceptual model with right holder, management, property rights and boundary address packages.
Terms such as 3D property unit, boundary point, boundary line and boundary surface are defined, and informative annexes give examples and attribute description tables.
It applies to describing the spatial data of these elements and to building databases of them. It was issued on 11 October 2021 and has applied since 11 October 2021.
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Document preview — GB/T 40771-2021
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
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Basic requirements
- 4.1 Fundamentals of Mathematics
- 4.2 Accuracy requirements
- 4.3 Data format
- 4.4 Unit of measurement
- 4.5 Actual measurement of boundary point
- 5 Spatial information expression
- 5.1 The content expressed by three-dimensional spatial elements
- 5.2 Spatial expression
- 5.3 Expression of geometric relations
- 5.4 Expression of spatial position relationship
- 6 Attribute information expression
- 6.1 Conceptual model
- 6.2 Right holder package
- 6.3 Management Pack
- 6.4 Property rights package
- 6.5 Boundary Address Package
- Appendix A (informative appendix) Example of expression of three-dimensional spatial elements of urban real estate
- Appendix B (informative appendix) Boundary site point, boundary line, boundary surface and property body description example
- Appendix C (informative appendix) Property information description table of the right holder package
- Appendix D (informative appendix) Management package attribute information description table
- Appendix E (informative appendix) Property rights package attribute information description table
- Appendix F (informative appendix) Description Table of Address Packet Attribute Information
- Reference
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Introduction
The three-dimensional application of land resources makes urban space continue to extend underground and above ground, and various high-rise buildings and underground spaces across parcels As it emerges in the city, there is an urgent need for standardized expression methods to support the ownership registration and management with three-dimensional real estate as the basic unit.
Aiming at the three-dimensional spatial elements of real estate within the city, based on the real estate unit (property body), establish an urban three-dimensional real estate element system The first expression method is an important means to solve the three-dimensional real estate management problems in the three-dimensional land development and utilization, and it is also an urban space management And one of the core technologies of modeling. In order to express the spatial and attribute information of the three-dimensional space elements of urban real estate in a unified and standardized manner, Develop this standard.
1 Scope
This standard specifies the basic requirements for spatial information and attribute information of three-dimensional spatial elements of urban real estate.
This standard applies to the description of spatial data of three-dimensional spatial elements of urban real estate and the establishment of databases.
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 document. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 17986.1 Specification for Property Measurement Unit 1.Property Measurement Regulations
TD/T 1001 Cadastral Survey Regulations
CJJ/T 8 Urban Survey Specification
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Real estate
Land (sea area) and fixed objects such as houses and trees. [GB/T 37346-2019, definition 3.15]
3.2 Urban real estate
Land, houses, forests and other fixed objects within the city limits.
3.3 Three-dimensional spatial elements of urban real estate
The three-dimensional spatial elements of real estate with three-dimensional characteristics in urban real estate (3.2).
3.4 3D property unit
A three-dimensional space domain with a fixed geographic location and shape with fixed ownership boundaries, independent rights and consistent ownership, which is a city that does not move The basic unit that produces three-dimensional spatial elements (3.3), including structures such as three-dimensional parcels and houses.
3.5 Boundary line
The ownership boundary of the property body (3.4).
3.6 Boundary point
The turning point of the boundary line (3.5).
3.7 Boundary surface
The closed surface formed by the boundary line (3.5).
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.
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