Standard number: GB/T 20257.3-2017 Standard name: GB/T 20257.3-2017 National basic scale map diagram Part 3: 1:25000, 1:50000, 1:100000 topographic map diagram decryption English name: Cartographic symbols for national fundamental scale maps— Part 3 ：Specification for cartographic symbols 1:25000 1:50000 & 1:100000 topographic maps Standard format: PDF Release time: 2017-10-14 Implementation time: 2018-05-01 Standard size: 10.3M Standard introduction: GB/T20257 "National Basic Scale Map Diagram" is divided into 4 parts Part 1: 1:5001:10001:2000 Topographic Map Part 2 1:5001:1000 topographic map format; Part 3: 1:250001:500001:100000 topographic map format Part 4: 1200109100 format This part is Part 3 of GB/T 20257 This part replaces GB/T 20257.3-2006 "National basic scale map format Part 3: 1:25000, 1:5000 1:100000 topographic map format". Compared with GB/T20257.3-2006, this part has the following major changes: 19 elements have been added: well house, drying room, other purpose houses, tailings pond, watchtower, construction area, open-air warehouse, material factory, greenhouse, greenhouse, port, special oxygen supply point, Buddha drying platform, windbreak wall, high-speed railway, viewing platform, village road, wildlife passage, heat dissipation, territorial sea baseline, territorial sea base point, windbreak and sand fixation grid; the selection indicators of elements have been supplemented and improved, and the 41 measurement control points in the original standard have been modified to positioning basis, and the 4 in the original standard have been modified to positioning basis. The main roads, secondary roads and branches in 3.1 blocks were deleted from residential areas and facilities and classified into 44 traffic category; The original standard 4221.1 exposed reefs were deleted from reefs and classified into 422 islands and underwater islands; The school in 43.38 in residential areas and facilities was improved, and "b. middle and primary" was changed to "b. middle and primary schools, vocational education schools" The other roads in 448 were changed to village roads, and a brief description of the village roads was added; Some errors in the original standard such as symbol size, color, description, etc. were modified This part was proposed by the National Administration of Surveying, Mapping and Geoinformation. This part is under the jurisdiction of the National Technical Committee for Standardization of Geographic Information (SAC/TC230). Drafting units of this part: Institute of Surveying, Mapping, Irrigation and Chemistry, National Administration of Surveying, Mapping and Geoinformation, First Institute of Geographic Information System, National Administration of Surveying, Mapping and Geoinformation. Main drafters of this part: Deng Guoqing, Guo Yufang, Ban Xiaoqing, Yan Jingxin, Wang Huanping and Hu Yongzhi. The previous versions of the standard replaced by this part are: GB12342-1990; GB/T202573-2006
This part of GB/T 20257 specifies the symbols, annotations and outline decoration of various landforms and geomorphic elements shown on 1:25 000 1:50 000 1:100 000 topographic maps, as well as the methods and basic requirements for using these symbols. This section is applicable to the surveying and mapping of 1:25 000 1:50 000 1:100 000 topographic maps. It can be used as a reference for the preparation of geographic base maps or surveying and mapping maps of similar scales.

National Standard of the People's Republic of China
GB/T 20257.3-2017
Replacement GB/T20257.3.-2006
National Basic Scale Map Diagrams
Part 3: 1 : 25 000 1 : 50 000 1 : 100 000 Topographs
Cartographic symbols for atiorral full-scale mape.Part 3; Specifications for cartographic synbols1 : 25 000 1 : 50 000 & 1 : 100 000 topographs #naps2017-10-14Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2018-05-01Implementation
GB/T 20257.3—2017
Normative references
General provisions
Classification of symbols
Symbol size
Symbol positioning
Symbol configuration
Symbol usage methods and requirements
Topographic map division and original decoration
Topographic map color
Symbols and annotations
Positioning basis
Residential areas and facilities
Boundary·
Vegetation and soil quality
Annotations·
Appendix A <Normative Appendix)
Appendix B (Informative Appendix) Appendix)
Appendix (normative appendix)
References
Explanation and annotation table
Sample map examples
Map outline decoration sample
GB/T20257 National basic scale map diagram" is divided into 4 parts, Part 1, 15001:10001:2000 topographic map diagram; Part 2: 1500℃110005 topographic map diagram; Part 1:250001150000110000C: map diagram: Part 4: 11250C031:5000001100C000 topographic map diagram. This part is Part 3 of GB/T20257. GB/T20257.3—2017
This part replaces GB/T20257.3-2006 National Basic Scale Map Diagram Part 3: 1:25009, 1:50001; 100000 Topographic Map Diagram". Compared with GB/T20257.3-20C6, the main changes in this part are as follows: 19 elements are added: well house, drying room, other purpose room, tailings pond, transfer building, construction area, open-air warehouse, material factory, greenhouse, shed, port, special oxygen supply point, Buddha platform, windbreak wall, high-speed railway, viewing platform, village road, wildlife passage, heat sink, territorial sea baseline, territorial sea base point, windbreak and sand fixation grid; the full index of elements is supplemented and improved;
the original 1.1 Survey control points in the standard are modified to positioning basis. The main roads, secondary roads and branches in the source standard 4.3.1 Balance area are deleted from residential areas and facilities and belong to 4. Transportation category; the source standard 4.2.21.1 Reefs are removed from reefs and belong to 4.2.22 Island and underwater islands; 4.3.38 Schools in residential areas and facilities are improved, "b. Middle and primary schools\" is modified to "6. Middle and primary schools, vocational education schools", and other roads in 4.4.8 are changed to village roads, and a brief description of village roads is added. Some errors in the original standard such as symbol size, color, description, etc. are modified. This part is proposed by the National Administration of Surveying, Mapping and Geoinformation, and this part is under the jurisdiction of the National Geographic Information Standardization Technical Committee (SAC/1C230). Drafting units of this part: National Surveying, Mapping and Geoinformation Standardization Institute, National Administration of Surveying, Mapping and Geoinformation Computing and Mapping Institute.
The main drafters of this part: Deng Guoqing, Guo Yushi, Yin Xiaoqing, Yan Jingxin, Wang Huanping, Hu Yongzhi. The previous versions of the standard replaced by this part are: GB12342—1990;
--GB/1 20257.32905,
1 Scope
National basic scale map formatwwW.bzxz.Net
Part 3 1:250001:50000
1:100000 topographic map format
GB/T 20257.3—2017
This part of GB/T 20257 specifies the symbol annotation and outline decoration of various objects and landform elements represented on 1:2500C1+500001:0C00 topographic maps, as well as the methods and basic requirements for using these symbols. This part is applicable to the surveying and mapping of 1:250001:50001:100000 topographic maps. It can be used as a reference for the preparation of geographic base maps or small maps of similar scales.
2 Normative references
The following documents are indispensable for the application of the following documents. For referenced documents with different dates, only the version with the date is applicable to this document. For referenced documents without dates, the latest version (including all amendments) is applicable to this document. GR/T13989 National Standard for the Division and Reduction of Topographic Maps 3 General Provisions
3.1 Classification of symbols
3.1.1 Scale symbols: symbols of features whose length and width can be expressed according to the scale after the features are reduced according to the scale. 3.1.2 Semi-scale symbols: When the length of a feature can be expressed according to the scale after it is reduced, but the width cannot be expressed according to the scale, the width dimension value is marked next to the symbol.
3.1.3 Non-scale symbols: When the length and width of a feature cannot be expressed according to the scale after it is reduced. The symbol dimension is marked next to the symbol.
3.2 Symbol dimensions
3.2.1 Dimension values ​​marked with numbers next to the symbol: All are in millimeters (mm). 3.2.2 When only one dimension value is marked next to the symbol, it indicates the diameter of a circle or circumscribed area, the side length of an equilateral triangle or square; when two dimension values ​​are listed in parallel, the first digit indicates the height of the main part of the symbol, and the first digit indicates the length of the main part of the symbol; for linear symbols, the single line refers to its thickness; the double line refers to the width of the line thickness (for streets, it refers to the width of the blank part). If the dimension value needs to be marked separately on the symbol, it is indicated by a dotted line.
3.2.3 The thickness of the line of the symbol, the length of the line segment and the angle between the intersecting line segments, etc., if not specified, shall be based on the symbols in this figure. In general, the line thickness is 0.1mm, the diameter of the point is 0.15mm, the length of the line of the non-main part of the symbol is 0.3mm (such as the short line of the steep slope), and the angle of the non-crossing line segment is 45\ or". 3.3 Positioning of symbols
3,3,1 If there is a point in the symbol graphic, the point is the actual center position of the feature. 3.3.2 For symbols such as circles, squares, rectangles, etc., the positioning point is at the center of their geometric figures. GB/T 20257.3-—2017
3.3.3 The positioning point of wide-bottom symbols (such as Mongolian embankments, chimneys, water towers, etc.) is at the center of their bottom line. 3.3.4 The positioning point of symbols with right angles at the bottom (such as windmills, road signs, independent trees, etc.) is at the vertex of their vertical lines. 3.3.5 The positioning point of symbols composed of several graphics (such as teaching bags, churches, weather stations, etc.) is at the center point or intersection of the graphics below. 3.3.6 The positioning point of symbols without bottom lines below (such as kilns, heng, mountain traces, etc.) is at the center point of the two end points below. 3.3.7 The positioning point of other symbols not expressed according to scale (bridges, sluices, dams, karst scoops, etc.) is at the center point of their symbols. 3.3.8 The positioning line of shaped symbols (such as roads, rivers, etc.) is at the middle transmission line of their symbols; when expressed according to scale, it is at the middle auxiliary line of the two side lines. 3.3.9 Except for those specified in the brief description that are expressed according to the true force direction, all symbols are multiplied by the southern outline. 3.4
Symbol arrangement
Symbols for vegetation and vegetation are divided into three categories according to their arrangement: a) Column type: arranged in fixed columns, such as nursery, grassland and economic forest, etc.; b) Column type: arranged in non-fixed columns, such as grass hill, irrigation cup, stone land, etc.) Corresponding type: symbols are indicated according to the density or position of the object, such as sparse forest, zero-wall tree, etc. When indicating symbols, attention should be paid to showing their distribution characteristics. When symbols are arranged, symbols are generally arranged according to the intervals indicated in the diagram. When the area is large, the symbol interval can be enlarged by 1 to 3 times. Under the principle of being able to express clearly, the annotation method can be used for expression. Note: Allocation means that the symbols used are explanatory symbols and do not have the meaning of positioning points. In the classification of land objects, there are scattered or columnar symbols to indicate the category of surface objects.
3.5 Symbol usage and requirements
3.5.1 In the diagram, unless otherwise specified, solid lines generally indicate the intersection of the outer contour of features and the surface (except for bridges, dams, sluice gates, and overhead pipelines), dashed lines indicate the projection of the underground or overhead parts of features on the surface, and dotted lines indicate land classification lines and feature boundaries. 3.5.2 Features represented by scale are classified into the following categories: a) For features with distribution range, the scale table is used, and colors are added within the range, such as rivers, etc.; or descriptive symbols or notes are configured, such as economic forests or garbage dumps, etc.; b) For surface features, the buildings within the distribution range are represented by corresponding symbols, and the name notes are configured at appropriate locations within the range. If the name notes cannot be included in the diagram, a scale symbol can be configured at an appropriate location or at the location of important buildings, such as schools, etc., or descriptive notes can be configured within the range, such as farms, etc. See Appendix A for brief notes; For features with unclear distribution boundaries, no boundary line is indicated, but explanatory symbols are arranged within their boundaries, such as salt and alkali, etc. d) The same features are distributed in groups, and their boundaries are indicated according to the scale. Symbols that are not in accordance with the scale can be arranged at moderate positions within their boundaries, such as cemeteries, etc.
3.5.3 When two features overlap, the part of the lower layer covered by the upper layer is disconnected according to the projection principle, and the upper layer remains intact. 3.5.4 The sizes of various symbols are specified according to the map sheet with medium density content of the topographic map. In order to make the topographic map clear and easy to read, in addition to allowing symbols to be cross-combined to indicate the province, the interval between each symbol (including the interval between the outline and the configured non-scale symbol) should not be less than 0.2mm. If the density of these features is too large and cannot be accommodated on the map, it is allowed to reduce the size of the symbol (reduction rate not greater than 0.8) or move the secondary feature symbol. Linear features displayed by double lines When their symbols are very close to each other, they are represented by collinearity: 3.5.5 When the features are dense and the positions of the features on the map conflict, the principle of handling the avoidance relationship is generally: when the natural features conflict with the artificial features, move the artificial features; when the main features conflict with the secondary features, move the secondary features; when the independent features conflict with other features, move the other features. 3.5.6 For some buildings and structures on the ground, which have symbols specified in the diagram but are not convenient to be classified, the outline or model of the object is briefly represented, and an explanation is added. The contour graphic line of the feature is represented by a (.1mm solid line, and the feature distribution model is represented by a line, Land class boundaries are indicated by land class boundary symbols.
3.5.7 In the symbol column of this diagram, dotted lines indicate that the actual boundary line should be indicated by land class boundary symbols; solid lines indicate that the boundary line is not indicated and the symbol is placed within the boundary. GB/T20257.3—2017
3.5.8 Numerical notes on width, depth, height, etc. beside the symbol. If it is less than 3, it is marked to 0.1m; if it is greater than 3, it is marked to the whole meter. 3.5,9 Explanation of various numbers: All "in\" include the number itself (such as greater than 3m, including 3m), and "less than" does not include the number itself. The meanings of "above" and "below" in the symbol grade descriptions of each subject are the same as those mentioned above. Appendix B of 3.5.10 gives examples of symbol representation and coordination. 3.6 Division of topographic maps and gallery decoration
The numbering of topographic map sections shall be in accordance with the provisions of GB/T13989. For map decoration, see Appendix (
3.7 Colors of topographic maps
11250C0, 1:50000, 1:10000C Topographic maps use cyan, magenta, yellow and black (CMYK) colors, and are separated according to the specified color values. When printing, spot color printing or monochrome printing may be used as needed. 2
GB/T 20257.3—2G17
Symbols and annotations
Symbol name
Positioning basis
Natural corner point
. On the ground level
156,7-
A high crow
—Comparative height
4.1.2 Buried stone point
, ruins
Leveling point
Satellite positioning continuous operation station
Satellite positioning grade point
Independent astronomical point
—Elevation
Surface river
a. Shoreline (normal water level shoreline, actual
measured shoreline)
5. High water level shoreline
Qingjiang-
River name
1 : 25 030
1: 50000
1:100000
Symbol style
1.eA 158.7
a 156.7
[.2口275.4
a 2.5 0 275,4
.26 32.90
2.049号2
2.1★ 24.6
Symbol rescue diagram
Color value
a, c100
Color C20
M-0Y00
Monochrome diagram water
Color and
Brief description
GB/T 20257.3--2217
4.1 Positioning foundation
The positioning foundation includes mathematical foundation and surveying control points. The mathematical foundation mainly refers to the map corridor, meridian line, coordinate grid line, etc. The method of expressing is shown in the table C
The geometric center of the symbol of each surveying point on the map indicates the center position of the control point mark on the ground; the elevation note next to the symbol indicates the elevation of the surface of the actual mark. The elevation is generally noted to the right of the symbol, and the quotient is noted to the left of the symbol. The elevation of the surveying control point is noted to 0.0m if it is measured with a precision of fourth-class leveling or above, and to 0.1m for others. For survey control points located within residential areas, if they affect the display of residential landforms, their elevation notes can be omitted, but the symbols of leveling points should be omitted at the same time. When independent features such as chimneys and water towers are used as control points, the corresponding feature symbols should be indicated on the map, and the elevations and feature relative heights should be noted. 4.1.1 National-level triangulation points and precision traverse points determined by fan triangulation or precision traverse methods, which are located on earth mounds and whose soil cannot be expressed according to scale, are indicated by the symbol "a". 4.1,2 Sleeping stone or natural rock 1: chiseled with 5\ or 10\ small triangulation points, traverse points and control points with accuracy lower than that of small triangulation points. Those located on the soil pile and the upper pile cannot be represented by the center are represented by the symbol "a". 4.1.3 National level elevation control points determined by leveling method. 4.1.4 Class A global navigation satellite system (GNSS) network points determined by satellite positioning technology. 4.1.5 Class B, D, E global navigation satellite system points determined by U-star positioning technology. 4.1.6 Use astronomical observation to directly determine the control points of the point coordinates and azimuth. Astronomical points with geodetic coordinates are represented by triangulation point symbols. 4.2 Water system
includes rivers, ditches, lakes, reservoirs, oceans, water conservancy elements and ancillary facilities, etc. 4.2.1 Natural rivers on the ground with water all year round. The coastline is the effective boundary between the water surface and the land, also known as the water edge line. The coastline of rivers, tidal bores and reservoirs is determined by the water level at the time of photography (or mapping); if the water level is measured at the time of photography or mapping) When the measured water level is very different from the normal water level (the stable water level for most of the year) during the dry or flood season, it should be measured according to the normal water level coastline. The coastline coincides with the protective dike, so the coastline can be omitted. The high-water coastline is the boundary between the high water surface and the land in the rainy season, also known as the high-water boundary. When the distance between the high-water boundary and the gate of the water island line is greater than 2mm on the map, the high-water boundary should be indicated. The high-water boundary of ponds, reservoirs and products with unclear boundaries is not indicated. When the high-water boundary coincides with the steep bank, the high-water boundary is omitted and the steep bank symbol is indicated. If there is a beach between the water boundary and the waterline, it shall be indicated by the corresponding beach symbol, see 4.2.24. Rivers shall generally be shown. In areas with dense river networks, those with a length less than 1.5 cm on the map may be omitted as appropriate. For rivers and canals that form a network system, the spacing shall be selected according to the characteristics of the river plan. The spacing between dense rivers and canals shall generally not be less than 3 mm. The spacing between branches in the floodplain of old rivers and areas with dense ditches shall not be less than 2 mm. If the width of a river is less than 1.5 mm, it shall be indicated by a double line according to the scale. If it is less than 0.5 mm, it shall be indicated by a 0.1 mm~c.4 mm single line representation. The width of the actual river corresponding to the width on the diagram is shown in Table 1. GR/T 20257.3-2017
Symbol name
Lower river section outlet
4.2.3 Disappearing river section
Seasonal sprinkle
, no fixed water hammer line
(7-9)--water month)
4.2.5 Dry riverbed (thousand rivers)
a. River channel
5. Overflowing ten rivers
4.2.6 Canal
Prone to the ground
al, without dike
a2. With dike
2,8 -—Higher than
23, with trenches
b, high and small ground
b1. Without camera
b2. With lift
2. ---—Comparison
1:250001:500001:1c0000
Symbol sample
Symbol enlargement
Symbol color value
Color C20
Color C2n
MIOY1QOK30
Bread Cao
Scale
1:25003
1:50000
1:102000
Brief description
Actual river overview
4,2.2 The river sections that flow underground or through mountains are on the ground! : The exit of GB/T 20257.3--2017
Width of the derivative on the diagram
C.1 mm~-C.4 mm Single line
Double line is indicated by the scale
1.1 mm~0.4mm Single line
Double line is indicated by the scale
0.1 tmw~-0.4 tntm Single line
Double line is indicated by the scale only
The length greater than 1mm should be indicated as small, and the length less than 1mm is directly connected, and its symbol arc is installed at the location of the water flow escape. 4.2.3 The river flows through swamps, sandy areas, etc., and there is no obvious riverbed or surface where the water flow disappears. The disappearing river section is indicated by one or two rows of dotted lines according to the actual width. The length greater than 2I1 on the diagram should be indicated. The length less than 2zn is directly connected in Figure 1.
4.2.4 Natural rivers with seasonal water.
Those with a length greater than 1.5 cm on the map should be indicated. The upper boundary of the new sediment (silt) is the seasonal river bank (not a fixed water bank), and the months with water are noted. Seasonal rivers with a width greater than 0.4 mm on the map are indicated by double dashed lines according to the scale, and those with a width less than 0.1 mm are indicated by a single line with a gradient of 0.1 mm to 0.4 mm. The actual seasonal width corresponds to the width indicated in Figure 1 and is the same as in Table 1. For seasonal rivers indicated by a single line, the length of the real part of the symbol is gradually changed from 0.5 mm to 2.0 mm according to the length of the river, and the empty part is gradually changed from 0.3 mm to 0.5 mm.
4.2.5 The end of a river with water for a short period of time after precipitation or snowmelt, or the old river channel left after the river is diverted. The riverbed is divided into channel riverbed and overland riverbed (riverbed without obvious riverbed). The length of the riverbed on the map should be greater than 15 cm?. The dry riverbed width less than 0.4 mm is represented by a single line gradient of 3.1 mm~0.4 mm on the map, and the width greater than 0.4 mm is represented by double lines according to the scale; the riverbed with a width greater than 3 tn should be represented by contour lines and corresponding soil symbols. The actual dry riverbed width corresponds to the width represented on the map in the same way as Table 1. The real part of the dry riverbed represented by a single line can be based on the length of the riverbed, gradient 0.5 mm~2.0 rcC, and the blank part gradient 0.3 mm~0.5 mm. The riverbank of the lower riverbed is represented with the gully symbol or combined according to the speed of the water flow. The dry riverbed with a continuous flow is represented by the corresponding soil symbol. 4.2.6 Cross A man-made waterway dug in a river basin for irrigation and navigation. The width of a canal on a map is determined by the distance between the riverbanks: the name of the canal section is annotated. The South-North Water Project is also represented by this symbol, and the name of the city is annotated or annotated with "South-North Water Project\Note". 4.2.7 Artificially built waterways for irrigation, water diversion, and drainage, and structures should be determined by the distance between the roots and saws of the pools and ditches. See Table 2 for the representation of the map. Table 2
Kun Example Scale
126 000
1:50090
1:10000C
Actual canal construction
5 mx width 10 m
10 m≤width<20
20 mswidth 40 r
Symbol width on the map
0.15 mm(branch canal)
C3 mm(main canal)
Double lines are indicated according to scale (main canal)
0.15 mm(branch canal)
c.3m (flat canal)
Double levels are indicated according to scale (main canal)
0..5 mm(branch canal)
c,3 mml in normal)
Double destruction is indicated according to scale (below)
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