GB/T 20257.2-2017Cartographic symbols for national fundamental scale maps—Part 2:Specifications for cartographic symbols 1:5 000 & 1:10 000 topographic maps (English PDF)

Foreword

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

--- Part 1. 1.500 1.1000 1.2000 topographic map;

--- Part 2. 1.5000 1.10000 topographic map;

--- Part 3. 1.25000 1.50000 1.100000 topographic map;

--- Part 4. 1.250000 1.500000 1.1000000 topographic map.

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

This part replaces GB/T 20257.2-2006 "National Basic Scale Map Drawing Part 2. 1.5000, 1.10000 Shape chart. The main changes in this section compared with GB/T 20257.2-2006 are as follows.

--- Added 21 elements. tailings pond, tower, construction area, open cargo warehouse, material field, dedicated oxygen supply point, park, playground, fitness, Recreational facilities, observation deck, sun buddha, wind wall, high speed railway, village road, street, service area, wildlife passage, heat sink, straight Ascending aircraft apron, territorial sea baseline, territorial sea base point, wind and sand fixed square, bare land, glaciers (note);

--- Supplementary and improved indicators of the selection of factors;

--- Modify the 4.1 measurement control point in the original standard to the positioning basis;

--- Remove the main roads, secondary trunk roads and feeder lines in the original standard 4.3.1 block from the residential areas and facilities, and class them into 4.4 traffic categories;

--- Remove the original standard 4.2.22.1 Ming Reef from the reef, into the island of 4.2.23, water island;

--- Improve the 4.4.31 schools in residential areas and facilities, and modify "b. primary and secondary schools" to "b. primary, primary and vocational education schools";

--- Change the other roads in 4.4.9 to village roads and add a brief description of the village roads;

---Modified and improved some symbol size, color, description and figure decoration in the original standard.

1 Scope

This part of GB/T 20257 specifies the symbols and notes of various features and geomorphological elements represented on the 1.5000 and 1.10000 topographic maps. Remarks and frame finishing, as well as the use of these symbolic methods and basic requirements.

This section applies to the mapping of 1.5000, 1.10000 topographic maps. The preparation of the geographical base 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