GB/T 20258.3-2019Data dictionary for fundamental geographic information features—Part 3: Scale of 1:25 000 1:50 000 1:100 000 (English PDF)

Foreword

GB/T 20258 "Basic Geographic Information Element Data Dictionary" is divided into four parts.

--- Part 1. 1.500 1.1000 1.2000 scale;

--- Part 2. 1.5000 1.10000 scale;

--- Part 3. 1.25000 1.50000 1.100000 scale;

--- Part 4. 1.250000 1.500000 1.1000000 scale.

This part is the third part of GB/T 20258.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces GB/T 20258.3-2006 "Basic Geographic Information Elements Data Dictionary Part 3. 1.25000 1.50000 1.100000 Basic Geographic Information Element Data Dictionary.

Compared with GB/T 20258.3-2006, the main technical changes in this section are as follows.

--- Added 21 elements. water well house, drying room, other use houses, tailings pond, tower, construction area, open-air warehouse, greenhouse, Ports, dedicated oxygen supply points, sun-baked platforms, railway observation decks, village roads, wildlife passages, heat dissipation rods, wind walls, territorial sea baselines, territorial waters Base point, special administrative area boundary, wind-proof sand-fixing stone square, wind-proof sand-fixing grass square;

--- Increased the rules for data dictionary element classification;

--- Added Chapter 6 "Element Data Dictionary Expansion Principles";

--- Added two data items "data source and update date" in the feature attribute table;

--- Removed the Ming Reef elements and moved their geometric and cartographic representations to the island features;

---Modified some sample symbol size, color, description and other errors in the original standard.

1 Scope

This part of GB/T 20258 specifies the 1.25000, 1.50000, 1.100000 basic geographic information element data dictionary. Description of the structure and elements.

This section applies to 1.25000, 1.50000, 1.100000 scale basic geographic information database data production, database construction, and more New and maintained. Analysis and application of basic geographic information data of 1.25000, 1.50000, and 1.100,000 scale can be referred to carried out.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 13923 basic geographic information element classification and code

GB/T 20257.3 National Basic Scale Map Drawing Part 3. 1.25000 1.50000 1.100000 Terrain Schema

3 Terms and definitions

The following terms and definitions apply to this document.