GB/T 45666-2025 in English
VALIDClassification codes and cartographic symbols for land pipeline features
- Issued on:2025-05-30
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Via email within 5 business days
$553.00
| Standard No: | GB/T 45666-2025 |
| Document status: | VALID |
| Title in English: | Classification codes and cartographic symbols for land pipeline features |
| Title in Chinese: | 陆域管线要素分类代码与符号表达 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-09-01 |
| ICS Classification: | 07.040-Astronomy. Geodesy. Geography |
| Chinese Classification: | A75-Mapping in general |
| Professional Classification: | GB-National Standard |
| Related Keywords: | land pipeline
digitsoil pipeline digitswater pipeline pipeline detector pipeline |
| Related Topics: | Express
Elements English Address Element Classification Code Signal peptide expression Pro and expression signal peptide |
《GB/T 45666-2025陆域管线要素分类代码与符号表达》由TC230（全国地理信息标准化技术委员会）归口，主管部门为自然资源部（测绘地理）。
Introduction
Analysis of the core content of the standard
| Feature type | Classification level | Number of code digits | Example |
|---|---|---|---|
| Long-distance pipeline | Major category (1 digit) + medium category (1 digit) + minor category (2 digits) + subcategory (2 digits) | 6 digits | Oil pipeline: 131101 |
| Urban pipeline | Major category (1 digit) + medium category (1 digit) + minor category (2 digits) + subcategory (2 digits) | 6 digits | Water pipeline: 232307 |
Technical Innovations
Three-dimensional Coding System: A 6-digit hierarchical coding structure is used, in which:
- The first digit distinguishes long-distance pipelines(1) from urban pipelines(2)
- The second digit classifies the medium type (e.g., transmission line 11/power pipeline 21)
- The third and fourth digits define the functional sub-category (e.g., inspection well 13/valve 30)
- The fifth and sixth digits identify the specific entity (e.g., elbow 303/tee 304)
Symbol Expression Specifications
| Element Form | Expression Requirements | Typical Examples |
|---|---|---|
| Point elements | 7 positioning point rules, symbol specifications include single/double/multi-size values | Valve symbol 1.6mm+1.0mm |
| Line elements | Distinguish 8 line types such as solid line/dashed line/dash-dot line | Non-excavation pipelines use 3-1-0.3mm dash-dot line |
| Surface elements | Closed surface symbol + text annotation combination | Pump station boundary line + "×× Pump Station" label |
Implementation suggestions
Data collection: It is recommended to use Pipeline detector is used in conjunction with the symbol system of this standard for surveying and mapping. Special attention should be paid to the following:
- The positioning of point elements must strictly follow the six positioning rules specified in 5.2.1
- Pipelines of the same type must use a unified color value (RGB/CMYK value specified in Appendix E)
- The annotation font is uniformly isolinear, with a height of 2mm
Standard Evolution Analysis
Compared with the GB/T 20257 series of standards, the innovation of this standard is:
- For the first time, a unified coding system for long-distance pipelines and urban pipelines is established
- New classifications of modern municipal facilities such as integrated pipe corridors (code 28)
- Introduction of intelligent device coding such as RTU measuring points (252325) and charging piles (211315)
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