GB/T 20257.4-2017Cartographic symbols for national fundamental scale maps—Part4:Specifications for cartographic symbols 1:250 000 1:500 000 & 1:1 000 000 topographic maps (English PDF)

Foreword

GB/T 20257 "National Basic Scale Map" is divided into four parts.

--- Part 1: 1:500 1:1 000 1:2 000 topographic map;

--- Part 2: 1:5 000 1:10 000 topographic map;

--- Part 3: 1:25 000 1:50 000 1:100 000 topographic map;

--- Part 4: 1:250 000 1:500 000 1:1 000 000 topographic map.

This part is the fourth part of GB/T 20257.

This part replaces GB/T 20257.4-2007 "National Basic Scale Map Drawing Part 4: 1:250 000, 1:500 000 1:1 000 000 topographic map". The main changes in this section compared with GB/T 20257.4-2007 are as follows.

--- Edited the standard in accordance with the requirements of GB/T 1.1-2009.

--- Added 21 elements, including culverts; dangerous shore areas; shore beaches; venting torches; aquaculture farms; greenhouses, greenhouses; high-speed railways; Road; subway; maglev rail, light rail line; elevated road; wildlife passage; port; territorial sea baseline, territorial sea base; pit; windproof Sand square; mudslide; artificial steep ridge; shore ridge, soil ridge; economic crop land; fire zone.

--- Modified part of the symbol name, the modification of the symbol name includes positioning basis; swamp, wetland; ordinary house; open-pit mining Field, chaotic land; garden.

--- A brief description of some of the elements has been revised, including satellite positioning continuous operation sites; dry river beds; lakes, ponds; Cognac Lake; Reef; water beach; swamp, wetland; embankment; ordinary house; power plant (station); open pit mining, excavation; pipeline well (oil, gas well); Liquid and gas storage equipment; satellite ground station; standard rail railway; dock; garden; grassland.

--- Rationalized adjustments to the categorization of some elements, such as moving streets from residential areas and facilities to transportation.

--- "Ming Reef" was revised to "island, water island" not based on scale.

--- The general provisions have been revised.

---Modified some symbol size and color problem in the original standard.

1 Scope

This part of GB/T 20257 specifies various features and grounds represented on the topographic maps of 1:250 000, 1:500 000, and 1:1 000 000. Symbols, notes, and outlines of the features, and the methods and basic requirements for using them.

This section applies to the mapping of 1:250 000, 1:500 000, 1:1 000 000 topographic maps. Prepare geographic basemaps or surveys The ruler map can be used as reference.

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 13989 national basic scale topographic map framing and numbering

3 General regulations