This standard specifies the requirements, technical implementation methods and steps for the design of the technical interface between the terrain database and the place name database. This standard applies to the design and establishment of the technical interface between the terrain database and the place name database at the same level in the national basic geographic information system when using general geographic information system software at home and abroad, and other database management system software. This standard can be used as a reference when designing the interface between the terrain database and the place name database in the basic urban geographic information system. GB/T 17797-1999 Technical Specification for the Interface between Terrain Database and Place Name Database GB/T17797-1999 Standard Download Decompression Password: www.bzxz.net
This standard specifies the requirements, technical implementation methods and steps for the design of the technical interface between the terrain database and the place name database. This standard applies to the design and establishment of the technical interface between the terrain database and the place name database at the same level in the national basic geographic information system when using general geographic information system software at home and abroad, and other database management system software. This standard can be used as a reference when designing the interface between the terrain database and the place name database in the basic urban geographic information system.

GB/T17797—1999
This standard is formulated for the first time in my country. This standard is formulated for the design and establishment of the technical interface between the topographic database (hereinafter referred to as the topographic database) and the place name database (hereinafter referred to as the place name database) of the main database of the national basic geographic information system in China at the current stage and in the future. This standard is proposed and managed by the National Administration of Surveying, Mapping and Geoinformation. The drafting units of this standard are: Chinese Academy of Surveying and Mapping, Institute of Surveying and Mapping Standardization of the National Administration of Surveying, Mapping and Geoinformation. The main drafters of this standard are: Liu Ruomei, Duan Yihong, Jiang Jingtong, Tan Jianguo. 480
1 Scope
National Standard of the People's Republic of China
Technical rules for data interface between topographic database and geographic name database
GB/T 17797 - 1999
This standard specifies the requirements for the design of the technical interface between topographic database and geographic name database, the methods and steps for technical implementation. This standard is applicable to the design and establishment of the technical interface between topographic database and geographic name database of any same level in the national basic geographic information system when using domestic and foreign general geographic information system (GIS) software and other database management system (DBMS, including relational database management system RDBMS) software. This standard can be used as a reference when designing the interface between topographic database and geographic name database in the basic urban geographic information system.
2 Definitions
This standard adopts the following definitions.
2.1 Feature entity
Feature entity refers to the natural and social elements on the surface of the earth represented by the geometric features of points, lines and surfaces in the terrain database. A feature entity can be a point, a line or a surface, or multiple points, multiple lines or multiple surfaces. One or more feature entities can have one place name or multiple place names.
2.2 Technical interface Through certain technical means, a connection is established between the feature entity of the terrain database and the place name record of the place name database to achieve mutual access between databases. This connection is called a technical interface, or interface for short. 2.3 Common item
A pair of data items with completely identical data types, lengths and contents in the feature attribute table of the terrain database and the data file of the place name database. 2.4 Identification code A code that uniquely identifies a certain terrain feature entity. 2.5 Interface code
A code stored in the common item for use as an interface. The interface code can be an identification code, a temporary code, a serial code, etc. The interface code should remain unique in the database.
3 Requirements for the design of terrain database and place name database
3.1 Requirements for the design of terrain database
The terrain database must design the technical interface with the place name database, including the design of common items between the element entities represented by three geometric features: point, line, and surface and the corresponding place name records.
3.2 Requirements for the design of place name database
Approved by the State Administration of Quality and Technical Supervision on August 2, 1999 and implemented on October 1, 2000
GB/T 17797—1999
The place name database must design the technical interface with the terrain database, including the design of common items between various place names and the point, line, and surface element entities corresponding to the terrain database.
3.3 When establishing a terrain database or a place name database separately (or in advance), the connection with the place name database or terrain database should also be considered to ensure the subsequent interface design and implementation. The database to be built later should be connected to the database that has been built. 4 Requirements for the management software used in the terrain database and the place name database 4.1 The geographic information system software or other database management system software used in the terrain database should be compatible with the relational database management system or file system used in the place name database, and can be directly connected or communicate without complex conversion. 4.2 The management software used in the terrain database and the place name database should have the function of processing Chinese characters. 5 Technical requirements and methods for the implementation of the interface between the terrain database and the place name database 5.1 The interface code as a common item should remain unique in the two databases, that is, one code corresponds to the place name record of a feature entity in the terrain database and a feature entity in the place name database. In addition, when using identification codes as interface codes, existing national standards and industry standards should be used, or codes expanded according to the above standards should be used. When there is no standard to follow, temporary codes or serial codes can be compiled by yourself, and the self-compiled codes should meet the needs of the interface.
5.2 When the data of the terrain database and (or) place name database is updated, all contents related to the interface should be updated at the same time. 5.3. 5.3.1 When a point feature entity corresponds to a place name, the point and the place name have the same interface code, reflecting a one-to-one correspondence. 5.3.2 When a point feature entity corresponds to multiple place names, the interface code should be used to reflect the one-to-many relationship. 5.3.3 A feature entity composed of multiple points is generally regarded as a surface and connected in accordance with the provisions of 5.5. 5.4 Implementation of linear feature entities and their place name interfaces in terrain and place name databases 5.4.1 When a linear feature entity composed of an isolated segment corresponds to a place name, the arc segment and the place name have the same interface code, forming a one-to-one correspondence.
5.4.2 When a linear feature entity composed of an arc segment corresponds to multiple place names, the interface code should be used to reflect the one-to-many relationship. 5.4.3 When multiple arc segments form the same linear feature entity and correspond to a place name, each arc segment should have the same interface code, forming a many-to-one relationship. Or logically combine multiple arcs into one arc according to a certain attribute, and then connect them according to the provisions of 5.4.1. 5.4.4 When the same linear feature entity composed of multiple arcs corresponds to two or more place names (such as the names of the upper reaches of the Yangtze River, Tuotuo River, Tongtian River, Jinsha River, etc.), the linear feature entity corresponding to each place name and its name should have the same interface code, and there should be a logical relationship between the interface codes. The connection is implemented through this code to form a one-to-one correspondence. Or connect according to the provisions of 5.4.2 and 5.4.3. 5.5 Implementation of the area feature entity and its place name interface in the terrain database and the place name database 5.5.1 When a single polygonal area feature entity corresponds to a place name (such as a reservoir, etc.), the polygon identification code can be used as the interface code, and the connection is implemented according to this code to form a one-to-one correspondence. 5.5.2 When a group of polygons of the same type correspond to a place name (such as a lake group, a residential area composed of blocks, etc.), the group of polygons should have the same interface code and be connected according to this code to form a many-to-one relationship. Or the group of polygons can be logically formed into a polygon according to a certain attribute (such as a polygon formed by the outer contour lines of the group of polygons), and then connected according to the provisions of 5.5.1. 5.5.3 When a group of polygons of different types correspond to a place name (such as a desert), the group of polygons should be logically formed into a polygon (such as a polygon formed by the outer contour lines of the group of polygons) to form a new one-to-one correspondence and connected according to the provisions of 5.5.1.
5.5.4 When a group of polygons with different identification codes correspond to ~ place names respectively, and the group of polygons also correspond to a higher-level place name (such as a political region, archipelago, etc.), the higher-level place name should be connected according to the provisions of 5.5.3, and the lower-level place name should be connected according to the provisions of 5.5.1. 6. Implementation steps of the interface between terrain database and place name database 6.1 Analyze the relationship between each element in terrain data and its corresponding place name, and compile the implementation plan of the interface between terrain database and place name database according to the technical requirements and methods proposed in this standard. bzxz.net
GB/T17797—1999
6.2 Determine the interface code coding principle and interface code structure (except for the use of existing national standards and industry standards) to ensure its effectiveness. 6.3 Encode the interface code according to 6.1.6.2. 6.4 Assign the compiled interface code to the common item of terrain database and place name database. Use this common item to connect the two databases. 6.5 Check the correctness and effectiveness of the interface. 483
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