GB/T 20258.2-2019Data dictionary for fundamental geographic information features—Part 2: Scale of 1: 5 000 1: 10 000 (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 second 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 20258.2-2006 "Basic Geographic Information Elements Data Dictionary Part 2. 1.5000 1.10000 Basic Geographic Information Element Data Dictionary.

Compared with GB/T 20258.2-2006, the main technical changes in this part are as follows:

--- Added the expression "relationship description" (see 4.8.2);

---All elements have added the "data source and data update date" attribute item, the feature geometry indicates that the attribute column in the table increases the data source And update date;

--- The definition of the direction attribute item in the element attribute table is changed from the original "angle with the east direction (°)" to "the counterclockwise direction with the east direction" Angle of formation (°)";

--- Added Chapter 6 element data dictionary expansion principle;

--- Added 20 elements. tower, tailings pond, construction area, open warehouse (material field), dedicated oxygen supply point, fitness and entertainment facilities, sun Buddha Platform, windbreak wall, village road, railway observation deck, service area, wildlife passage, heat spreader, helipad, territorial sea baseline, territorial waters The base point, the special administrative area boundary, the wind-proof sand-fixing stone square, the wind-proof sand-fixing grass square, and the bare land have expanded their classification codes, definitions, Attribute items and corresponding table contents;

--- Change the data type and value range of all feature data sources from "character type 10" to "character type 60";

---Modified Changzhou River-ground river, Changnian River-disappearing river section, seasonal river, canal, higher than ground canal, higher than ground branch channel, etc. Geometry and representation of the prime;

--- Modified the description of hydrological stations, subways, expressways, special elevation points, islands, coastlines, churches, railway stations and other elements.

1 Scope

This part of GB/T 20258 specifies the content structure and elements of the 1.5000, 1.10000 basic geographic information element data dictionary. description of.

This section applies to the production, construction, renewal and maintenance of the 1.5000, 1.10000 scale basic geographic information database.

The analysis and application of the basic geographic information data of 1.5000 and 1.10000 scale can be referred to and executed.

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 20257.2 National Basic Scale Map Drawing Part 2. 1.5000 1.10000 Topographic Map

3 Terms and definitions

The following terms and definitions apply to this document.