Cartographic symbols for national fundamental scale maps—Part 2:Specifications for cartographic symbols 1∶5 000 & 1∶10 000 topographic maps
Some standard content:
ICS07.040
National Standard of the People's Republic of China
GB/T20257.2-—2017
Reputation GB/T20257.2—2006
National Fundamental Scale Maps
Part 2: 1:5000 1:10000 Topographic Maps Cartographic symbols for national fundamental scale maps Part 2; Specifications for cartographiesymbols 1:5000 & 1:10000 topographic maps Issued on 2017-10-14
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on 2018-05-01
GB/T20257.2—2017
Normative Reference Documents
General Provisions| |tt||Classification of symbols
Symbol size
Symbol positioning
Symbol letter configuration
Symbol usage methods and requirements
Topographic map classification and map decoration
Topographic map color
Special numbers and notes
Positioning basis
Residential land and facilities
Vegetation and soil quality
Appendix A (normative appendix)
Appendix B (informative appendix)| |tt||Appendix C (Normative Appendix)
References
Explanation Notes Brief Notes Table
Sample Map Example
Map Decoration Style
GB/T20257 "National Basic Scale Map Diagram" is divided into 4 parts. Part 1: 1:500
111000
12000 Topographic Map Diagram:
1:10000 Color Map Diagram,
Part 2 1:5000
Part 3: 1=25000
Part 4: 1250000
1+100000 Topographic map format
1:500000
This part is Part 2 of GB/T 20257, 1:1000000 topographic map format,
This part replaces GB/T 20257.2-2006 (National basic scale map format). This part has the following main changes compared with GB/T20257.2-2006: Added GB/T20257.2-2017 Part 2: 1+5.000,110000 elements, residential mine warehouse, Meng building, construction area, equipment and cargo school, material yard, special supply and loading point, public Xiele field, Jiashen, Xianjingtai, Sunning Buddha platform, windbreak Rui, high-rise railway, village road, link road, service area, wildlife channel, scattered Hot sample, direct entertainment facilities
lift aircraft shutdown welding,
territorial sea baseline, territorial sea steam point·windbreak commercial sand grid, Lai land·glacier (note): supplement and improve
element inclusion indicators,
change the original standard
change the original standard 4.3.
change the original standard
measurement control point to the positioning base:
area of main roads, secondary roads and branches from residential areas and facilities with the mid-term decline, return to 4 .4 Transportation category; Mingde was deleted from magnets and assigned to 4.2.23 islands and underwater islands; 4.3.41 schools in residential areas and facilities were improved; "b middle and primary schools*" was changed to \b, middle and primary schools, vocational education schools; other highways in 4.4.9 were village roads, and the important description of village roads was added; some symbols, colors, descriptions and map decoration in the original standard were modified; this part was proposed by the National Geographic Information Administration; this part was proposed by the National Geographic Information Standardization Technical Committee The drafting unit of this part: National Bureau of Surveying, Mapping and Geographic Information Training and Standardization Research Institute The main drafters of this part: Chang Yushu, Huang, Duan Yihong, An Degong, Liu Xiaoqiang, Zhang Tang The previous versions of the standards replaced by this part are GB57911986; CB/T5791—1993:
GB/T20257.2—2005.
National Basic Scale Map Diagram
GB /T20257.2—2017
Part 2: 1:5000
1:10000 topographic map format
This part of GB/T20257 specifies the symbols, annotations and decoration of various landforms and geomorphic elements represented on 15000 and 1:10000 topographic maps, as well as the methods and basic requirements for using these symbols. This part is applicable to the surveying and mapping of 115000110.000 topographic maps + reduced geographic base maps. 2 Normative references
The following documents are indispensable for the application of this document. For all references with dates, only the dated version applies to this document. For all references without dates, the latest version (including all amendments) applies to this document. National basic steel ruler topographic map decomposition and reduction GB/T13989
3 General provisions
Classification of symbols
3.1.1 Scale symbols: 3.1.2 Semi-scale symbols: After the object is reduced in scale, its length and width can be expressed in scale. After the object is reduced in scale, its length can be expressed in scale. After the object is reduced in scale, its width cannot be expressed in scale. The symbol should be marked with millimeter size value,
3.1.3 Non-scale symbols: After the object is reduced in scale, its length and width cannot be expressed in scale. The symbol should be marked with special scale value,
The size of the symbol
3. 2.1 The dimensions marked with numbers shall be in metres (mm). Special numbers shall indicate only one dimension, indicating the diameter of an object, the side length of an equilateral triangle or a regular triangle. If two dimensions are listed side by side, the first digit indicates the height of the main part of the symbol, and the second digit indicates the width of the main part of the symbol: the number at one end of a linear symbol refers to its length, and the two parallel lines refer to the width of the connecting line (the other digit refers to the width of the blank part). Dimensions that require special marking on symbols shall be indicated by dots and lines.
3.2.3 The thickness of special lines, the length of line segments and the angle of intersection of line segments, etc., which are not specified, shall be based on the symbols in this diagram. In general, the thickness is 0.12mm, the diameter of the dot is 0.2mm, the length of the line that is not the main part of the symbol is 0.4mm (if the line can be started), and the angle of non-orthogonal line segments is 45° or 60°. 3.3wwW.bzxz.Net
Symbol positioning
If there is a point in the symbol figure, the point is the actual center of the feature. For symbols such as shapes, squares, rectangles, etc., the positioning point is the center of their geometric figures. Wide-bottomed symbols (yurts, smoked meat, water towers, etc.) The positioning point is at the center of its bottom line. The bottom of the symbol is a right angle (windmills, road signs, independent trees, etc.). The positioning point is at a point at a right angle. 1
GB/T20257.2—2017
Signs composed of several graphics (respect packages, classrooms, weather stations, etc.) The positioning point is below the center point of the positive shape or the intersection point. Symbols without a bottom line below (rich, Ning, out of adjustment, etc.) The positioning point is below the center point of the line connecting the endpoints of the perimeter. Other symbols not represented according to scale (bridge case, water use, water blocking, rock funnel, etc.) The positioning point is at the center point of the symbol. Linear symbols (pathways, interflows, etc.) The positioning line is at the center of the symbol. Auxiliary lines: When represented according to scale, the central axis symbols of the two lines are perpendicular to the south map except for those specified in the brief description that they are represented according to the actual direction. The symbol configuration
Soil and vegetation symbols can be divided into three situations according to their arrangement forms: a)
Order type: arranged in a certain row, such as seedlings, grassland, economic forest, etc.; Hash type: arranged in no certain row, such as grass hill, wood forest, stone land, etc.; Corresponding type: symbols are expressed according to the density or position of the ground, such as vegetable forest, winter tree, etc. When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, economic forest, etc.; When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, economic forest, etc.; When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, economic forest, etc.; When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, economic forest, etc.; When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, stone land, etc.; When expressing symbols, attention should be paid to indicating their distribution characteristics,
Order type: arranged in a certain row, such as seedlings, grassland, economic forest ...
3.5 Methods and requirements for using special numbers
3.5.1 In addition to the special number markings in the diagram, a solid line indicates the intersection of the outer wheel of the building and the ground (except for the bridge cover, water room, and pipeline in the rack room), a dotted line indicates the projection of the underground part or the rack room part on the ground, and a dotted line indicates the land classification line and the boundary line of the land feature.2 The features represented by scale are divided into the following situations: a) The features are represented by scale, and colors are added to their scale, such as streams, etc., or non-scale symbols are placed in the appropriate position of their scale as an explanation, such as water. b) The distribution range of surface features is represented by scale, and descriptive special numbers or notes are given in their range, such as forests or garbage dumps, etc. The buildings within the distribution range of surface features are represented by corresponding symbols, and the names are given in the appropriate position of their range. If the names cannot be noted in the map, non-scale symbols can be given in the appropriate position of the main building, such as schools, etc., or descriptive notes can be given within their range, such as farms, etc. The brief notes are shown in Appendix A. For objects with unclear distribution boundaries, no scale lines are used, but descriptive special numbers are given in their range, such as land reclamation, etc. The same features are distributed in groups, and their range is based on scale. For example, when the terrain is represented by a scale, the symbol that does not conform to the scale can be placed in an appropriate position within its range, such as when the weather equipment is needed. When two features overlap, the part of the lower layer that is avoided by the upper layer is separated 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 terrain content. In order to make the terrain clear and easy to read, in addition to allowing the symbols to be crossed and combined, the interval between each symbol (including the interval between the screen line and the configured non-scale symbol) should not be less than 0.2mm. If the density of the terrain in some areas is too high and cannot be accommodated on the map, the size of the special symbol is allowed to be slightly reduced (the reduction rate is not more than 0.8) or the symbol of the secondary feature is moved. When the symbols of the linear features represented by double lines are very close, they can be represented by collinearity. 3.5.5 For some buildings and structures on the ground, which have no specific symbols in the diagram and are inconvenient to classify, a wheel sign or symbol can be used to represent the object, and an explanation can be added. The wheel sign of the feature is represented by a 0.12mm solid line, and the feature distribution range line is represented by the land class boundary symbol along the class boundary.
3.5.6 In the process of obtaining soil and vegetation numbers in this diagram, those with dotted lines should indicate the field range line with the land class boundary symbol; those with solid lines do not indicate the model line, and only configure symbols within the model. 3.5.7 The width, depth, relative height and other numerical annotations of the symbols are marked to 0.1m for those less than 3m and to the whole meter for those greater than 3m. The various numerical explanations of "greater than" include the number itself (such as greater than 3m, including 3m), and "small hand" does not include the number itself. The "above" and "below" in the various symbol level explanations include The above and Appendix B of 3.5.8 give examples of symbol representation and coordination. The topographic map division and gallery decoration are in accordance with the provisions of GB/T18989. For map decoration, see Appendix C. Topographic surrounding colors GB/T20257.2—2017 1*5.000 1*10000 Topographic maps use back, magenta yellow, black (CMYK ) Four-color night specified color value color separation: when printing copies, special color printing or single color printing can be used as needed, GB/T20257.2—2017
Special number and annotation
Symbol name
Positioning foundation
Two corner points
On the soil
Zhangwanling point name
256.71Elevation
156,7Brightness
5- Hight
Small triangulation point
On the upper course
Modaling, Zhangzhuang—roll call
294.91.156.7Gaoshe
Burial stone geography point
On the soil list
Jiangshan roll call
275.4Elevation
2.5 hight
Leveling point
mGuide level
Beijing-Shijiazhuang 5 point number||t t||32.80 elevation
Satellite positioning continuous operation site
14th point
493.26 elevation
Satellite positioning equal payment point
B equal wrinkle
14th point
493.25 elevation
Independent astronomical point
Zhou Jingshan roll call
24.5 elevation
115000||t t||Symbolic formula
1:10000
Symbol magnification
Symbol color value
4.1 Positioning basis
Brief description
GB/20257.2—2017
The positioning basis includes mathematical basis and surveying control points. The mathematical basis mainly refers to pattern lines, meridian lines, coordinate grid lines, etc. The representation method is shown in Appendix C
The geometric center of each surveying control point on the map indicates the center position of the control point mark on the actual map: the production process annotation of the symbol indicates the elevation of the actual mark surface
To mark a complete surveying control point, in addition to the control point symbol, the point name and elevation of the control point should also be noted on the map (expressed in fractional form, the numerator is the point name and the denominator is the elevation). The point name and elevation are generally noted on the right side of the symbol (when there is a relative height, the relative height is noted on the left side of the symbol). The elevation of the survey control point is annotated to 0.01m for those measured by the external reservoir and above, and to 0.1m for others. For the survey control point located in the residential area, if the residential area is shown, its point name and elevation annotation can be omitted. When using independent features such as tobacco and hydroponics as control points, in addition to indicating the corresponding feature symbols, the feature height, point name and elevation, the category of the survey control point should also be noted. For example, when the triangulation point cannot be annotated, it can be explained abroad. For example, the water tower in the northwest of Wangcun in the figure is a triangulation point. 4.1.1 Use triangulation method or precision traverse National level triangulation points and precision traverse points determined by surveying methods, which are located on the land register and cannot be expressed by a ruler, are indicated by the symbol "". 4.1.2 Small triangulation points with an angle of 5 or 10 degrees and other control points of the same degree, which are located on the land register and cannot be expressed by a ruler, are indicated by the symbol "". 4.1.3 Points with marks on marble or natural rocks and with a lower accuracy than small triangulation points, which are located on the land register and cannot be expressed by a ruler, are indicated by the symbol ". 4.1.4 National level elevation control points determined by leveling methods. A-level global navigation satellite system (GNSS) network points determined by satellite positioning technology. 4.1.5
4.1.6 B, C, D, E-level global navigation satellite system (GNSS) network points determined by satellite positioning technology. 4.1.7 Control points whose geographic coordinates and azimuths are determined by astronomical observation. Astronomical points with geodetic coordinates are indicated by triangulation point symbols 4.2
Including rivers, ditches, tidal flats, reservoirs, reservoirs, water conservancy elements and ancillary facilities, etc., GB/T20257.22017
Symbol name
Surface flow
Upper half line (city water level shoreline)
Actual national shoreline)
High water level storage goods
Qingjiang River - River name
Underground river section population
Disappearing river section
Seasonal river
Different water level solutions||tt| |（7-9）Watery moon cakes
Dry riverbed (dry river)
Hezi dry bay
b love real dry
Below the initial limit
1+5:000
Symbol style
1#10000
Symbol enlargement
Special package value
South color c1s
MOYI0CK30
Monochrome photo +
Water burning complexion
Purchase is K
South color c35
M6oY190| |tt||#colorcs
4.2.1 For natural rivers with water all year round, the shoreline
Brief description
GB/T20257.2—2017
is the boundary line between the water surface and the land, which is called the water source line in Chinese. It is divided into the constant water level line and the measured constant line: the constant water level line is the boundary line between the stable water surface and the land for most of the year; the measured shoreline is the boundary line between the water surface and the land when photographing or mapping on the spot. The shoreline of dams and reservoirs is generally the measured shoreline. The measured shoreline should be noted in the notes outside the map. During the aerial photography and mapping period, if the photography or mapping time is the low water or flood season, and the measured water level is very different from the normal water level, it should be measured according to the shoreline with water level. The river should be interrupted when it passes through bridges, dams, sluice gates, houses and other overhead buildings. b. High water level line
The high water level shoreline is the boundary between the high water surface and the land in the southern season of the year, which is called the high water boundary. When the distance between the high water boundary and the water edge line is greater than 3mm on the map, the high water boundary should be indicated. The high water boundary where the boundary between the reservoir and the actual field is not obvious is not indicated. When the high water boundary coincides with the water edge, the water edge is omitted and the shore symbol is indicated. If there is a shore level between the high water boundary and the water edge line, the corresponding shore level special number (see 4.2.25) is used to indicate the flow width. The maximum width on the map is 0.5mm is represented by double lines according to the scale, and less than 0.5mm is represented by a single line gradient from 0.1mm to 0.5mm. The actual river width corresponds to the width represented on the map in the table. Table 1
Scale
1+5:000
130 000
Actual river brightness
4.2.2 The river section flowing through the underground has its symbol width on the ground outlet map
0.1mm0.5mm Single line tear
Double line scale table
0.1mm0.5mm Single clear
Double line scale representation
The symbol reads and indicates the position of the water inlet and outlet. When the flow is smooth, it is represented by the smooth symbol. 4.2.3 When the river flows through ports such as Zhaoze and Shadi, there is no star riverbed or the section where the surface water flow disappears. The disappeared river section is represented by one or two rows of dotted lines according to the actual width. If the length on the map is less than the distance between the three points of the symbol, it may not be represented. 4.2.4 For seasonal rivers with water, the upper boundary of the newly accumulated sediment (mud) is the seasonal river bank (not a fixed water bank), and the months with water are added. If the seasonal river width is greater than 0.5 mm, it is indicated by a double dashed line according to the steel ruler, and if it is less than 0.5 mm, it is indicated by a single dashed line of 0.1 mm to 0.5 mm. The actual seasonal river width on the corresponding map is the same as that of the seasonal river indicated by a single line in Table 1. The length of the real part of the symbol can be changed to 0.5 mm according to the length of the river3. 0mm, the empty part changes to 0.3mm10mm
4.2.5 The riverbed with water within a certain period of time after precipitation or snowfall or the river channel left after the river is diverted. The dry riverbed is divided into a dry river and a freshwater river (a dry river without an obvious riverbed). The dry riverbed with a brightness less than 0.5mm is represented by a single line of 0.1mm~0.5mm, and the scale with a width greater than 0.5mm is represented by a double line: the riverbed with a width greater than 3mm should be represented by contour lines and corresponding main symbols. The real length of the dry riverbed symbol represented by the single line in the riverbed can be changed to 0.5mm~3.0.mm according to the length of the dry riverbed, and the white part can be changed to 0.3mm~1.0mm. The riverbank of the dry riverbed can be represented with gully symbols according to the condition of water erosion. Flooded dry rivers are indicated by corresponding soil symbols. 4.2.6 For artificial channels opened across river basins for water diversion and navigation, the width of the canal on the map shall be determined according to the actual distance between the edges. The canal sections with names shall be annotated with their names. The South-to-North Water Diversion Project is also indicated by this symbol and annotated with the corresponding name or the annotation "South-to-North Water Diversion Project". 4.2.7 Artificial waterways for irrigation, water diversion and drainage shall be indicated on the map according to the actual distance between the two sides. See Table 2 GB/T20257.22017
Symbol Name||tt| |hAbove the ground
2.5 batch height
eAnswer
2.5 relative height
Second well, underground channel, hidden frame
Water supply list (elevated frame)
According to scale
Semi-relying on scale
eNot made into scale
Water supply tunnel
Example siphon
2.5—Baokang
Kaihuai, pond according to
Water quality
1:5:000
Symbol sample
1:10000|| tt||Symbol magnification solid
Special color value
MeoY100KS0
Surface color Cas
1:10:000
Drainage ditch vegetables should be marked with the word "drainage" Brief description
Real pond ditch collection skin
1m wide courtyard product
3m wide E<5m
GB/T20257.2—2017
Special brightness on the week
0.2mm (bracket) single line
0.5mm (dry) single line||tt| |Double line scale representation (dry nest)
0.2mm (branch period) single line
0.5mm (dry book) single line
Double line scale representation (dry fruit)
The embankment of the fruit is represented by dike or surrounding bank. The representation method of levee width and slope is the same as that of dike. The ditch above the ground is represented by the symbol "b\. The source of the low-lying water system, the high waterway and the ditch with water-repelling equipment are represented by the special symbol ".
4.2.8 The ditch is formed by artificial excavation through high ground or mountain blue to form a section with very high surfaces on both sides. When the upper edge line of the ditch weight cannot be represented according to the actual position, the ditch weight symbol of the ditch represented by the double-line attenuation can be represented in the ditch special number, the short line is temporarily configured, and the water edge line is newly placed on the ditch temporary number: the upper edge line of the ditch weight represented by the single-line can be moved outward when necessary, and the contour line should also be moved accordingly to keep the relevant position correct and reasonable. It is only represented when the temporary relative height is above 1m and the length on the map is greater than 5mm. The relative ratio greater than 2m should be marked with the relative ratio.
4.2.9 Groundwater and groundwater in arid areas Snow water, and there are dark nests connected to them by wells. Except for the two ends of the same network that indicate the actual position of the wells at the starting and ending points of the dark channels, the rest are evenly arranged. Abandoned karez are marked with the word "abandoned"
, which can be used to mark out underground channels of a certain length. This symbol is also used to represent 4.2.10. When crossing valleys, roads or ditches, if the length of the water or water pipe water ferry is greater than the symbol size, it is represented according to the scale. If there is a special name, the name is added, and the abandoned water trough is marked with "abandoned".
4.2.11 For water-passing channel facilities built in the mountains or underground, see 4.2.2 for the exit numbers.
When the head of the channel intersects with railways, highways, rivers and other planes, siphon-type water-passing channels are set up under the road or underwater. 4.2.13 Water-passing or traffic bypasses built under structures such as roads and dams. Culverts attached to highways should be marked, and moisture retention in vortices attached to mechanized farming roads and the roads below them is not marked. 4.2.14 Ditches that are usually dry and only have water accumulation for a short period of time after rain, and are not dug into a surface or abandoned. On the map, widths less than 0.5mm are indicated by a single line, and those greater than 0.5mm are indicated by double lines according to the scale. Dry ditches with a depth less than 0.5m (1+5000 topographic map) and less than 1m (1+10000 topographic map) or a length less than 10mm on the map are generally not indicated. Those with a depth greater than 2m should be marked with protection. Old war lemons are also indicated by this symbol and annotated with "war amount". Waterlogged land or artificially excavated water or water bodies with a wide width and slow water volume changes, 4.2.15
The tidal shoreline is determined by the position of the normal water level: the fan sugar shoreline is generally determined by the edge line of the dam. The area less than 2mm to 4mm of the pool increase is generally not indicated. The area less than 2mm in the water-scarce area can be expanded to 2mm. The filtration increase is generally only taken as the sum, not the comprehensive but0mm, the bank of the dry riverbed can be represented with gully symbols according to the lateral erosion of the flowing water. The overflowing dry river is represented by the corresponding soil symbol. 4.2.6 The width of the artificial canal opened across the basin for water diversion and navigation is determined according to the distance between the edges on the actual bank. The name of the canal section with a name is added. The South-to-North Water Diversion Project is also represented by this symbol, and the corresponding name annotation or the "South-to-North Water Diversion Project" annotation is added. 4.2.7 The representation of the artificially repaired waterway for irrigation, water diversion and drainage should be determined according to the actual distance between the waterways. See Table 2 GB/T20257.22017
Symbol Name||tt| |hAbove the ground
2.5 batch height
eAnswer
2.5 relative height
Second well, underground channel, hidden frame
Water supply list (elevated frame)
According to scale
Semi-relying on scale
eNot made into scale
Water supply tunnel
Example siphon
2.5—Baokang
Kaihuai, pond according to
Water quality
1:5:000
Symbol sample
1:10000|| tt||Symbol magnification solid
Special color value
MeoY100KS0
Surface color Cas
1:10:000
Drainage ditch vegetables should be marked with the word "drainage" Brief description
Real pond ditch collection skin
1m wide courtyard product
3m wide E<5m
GB/T20257.2—2017
Special brightness on the week
0.2mm (bracket) single line
0.5mm (dry) single line||tt| |Double line scale representation (dry nest)
0.2mm (branch period) single line
0.5mm (dry book) single line
Double line scale representation (dry fruit)
The embankment of the fruit is represented by dike or surrounding bank. The representation method of levee width and slope is the same as that of dike. The ditch above the ground is represented by the symbol "b\. The source of the low-lying water system, the high waterway and the ditch with water-repelling equipment are represented by the special symbol ".
4.2.8 The ditch is formed by artificial excavation through high ground or mountain blue to form a section with very high surfaces on both sides. When the upper edge line of the ditch weight cannot be represented according to the actual position, the ditch weight symbol of the ditch represented by the double-line attenuation can be represented in the ditch special number, the short line is temporarily configured, and the water edge line is newly placed on the ditch temporary number: the upper edge line of the ditch weight represented by the single-line can be moved outward when necessary, and the contour line should also be moved accordingly to keep the relevant position correct and reasonable. It is only represented when the temporary relative height is above 1m and the length on the map is greater than 5mm. The relative ratio greater than 2m should be marked with the relative ratio.
4.2.9 Groundwater and groundwater in arid areas Snow water, and there are dark nests connected to them by wells. Except for the two ends of the same network that indicate the actual position of the wells at the starting and ending points of the dark channels, the rest are evenly arranged. Abandoned karez are marked with the word "abandoned"
, which can be used to mark out underground channels of a certain length. This symbol is also used to represent 4.2.10. When crossing valleys, roads or ditches, if the length of the water or water pipe water ferry is greater than the symbol size, it is represented according to the scale. If there is a special name, the name is added, and the abandoned water trough is marked with "abandoned".
4.2.11 For water-passing channel facilities built in the mountains or underground, see 4.2.2 for the exit numbers.
When the head of the channel intersects with railways, highways, rivers and other planes, siphon-type water-passing channels are set up under the road or underwater. 4.2.13 Water-passing or traffic bypasses built under structures such as roads and dams. Culverts attached to highways should be marked, and moisture retention in vortices attached to mechanized farming roads and the roads below them is not marked. 4.2.14 Ditches that are usually dry and only have water accumulation for a short period of time after rain, and are not dug into a surface or abandoned. On the map, widths less than 0.5mm are indicated by a single line, and those greater than 0.5mm are indicated by double lines according to the scale. Dry ditches with a depth less than 0.5m (1+5000 topographic map) and less than 1m (1+10000 topographic map) or a length less than 10mm on the map are generally not indicated. Those with a depth greater than 2m should be marked with protection. Old war lemons are also indicated by this symbol and annotated with "war amount". Waterlogged land or artificially excavated water or water bodies with a wide width and slow water volume changes, 4.2.15
The tidal shoreline is determined by the position of the normal water level: the fan sugar shoreline is generally determined by the edge line of the dam. The area less than 2mm to 4mm of the pool increase is generally not indicated. The area less than 2mm in the water-scarce area can be expanded to 2mm. The filtration increase is generally only taken as the sum, not the comprehensive but0mm, the bank of the dry riverbed can be represented with gully symbols according to the lateral erosion of the flowing water. The overflowing dry river is represented by the corresponding soil symbol. 4.2.6 The width of the artificial canal opened across the basin for water diversion and navigation is determined according to the distance between the edges on the actual bank. The name of the canal section with a name is added. The South-to-North Water Diversion Project is also represented by this symbol, and the corresponding name annotation or the "South-to-North Water Diversion Project" annotation is added. 4.2.7 The artificially repaired waterway for irrigation, water diversion and drainage should be indicated on the map according to the actual distance between the waterways, see Table 2 GB/T20257.22017
Symbol Name||tt| |hAbove the ground
2.5 batch height
eAnswer
2.5 relative height
Second well, underground channel, hidden frame
Water supply list (elevated frame)
According to scale
Semi-relying on scale
eNot made into scale
Water supply tunnel
Example siphon
2.5—Baokang
Kaihuai, pond according to
Water quality
1:5:000
Symbol sample
1:10000|| tt||Symbol magnification solid
Special color value
MeoY100KS0
Surface color Cas
1:10:000
Drainage ditch vegetables should be marked with the word "drainage" Brief description
Real pond ditch collection skin
1m wide courtyard product
3m wide E<5m
GB/T20257.2—2017
Special brightness on the week
0.2mm (bracket) single line
0.5mm (dry) single line||tt| |Double line scale representation (dry nest)
0.2mm (branch period) single line
0.5mm (dry book) single line
Double line scale representation (dry fruit)
The embankment passed by the fruit is represented by dike or surrounding bank. The method of expressing the width and slope of the dike is the same as that of the dike. The ditch above the ground is represented by the symbol "b\, the source of the low-lying water system, the high waterway and the ditch with water-repelling equipment are represented by the special symbol ",
4.2.8 The ditch is formed by artificial excavation through high ground or mountain blue to form a section with very high surfaces on both sides. When the upper edge line of the ditch weight cannot be represented according to the actual position, the ditch weight symbol of the ditch represented by the double-line attenuation can be represented in the ditch special number, the short line is temporarily configured, and the water edge line is newly placed on the ditch temporary number: the upper edge line of the ditch weight represented by the single-line can be moved outward when necessary, and the contour line should also be moved accordingly to keep the relevant position correct and reasonable. It is only represented when the temporary relative height is above 1m and the length on the map is greater than 5mm. The relative ratio greater than 2m should be marked with the relative ratio.
4.2.9 Groundwater and groundwater in arid areas Snow water, and there are dark nests connected to them by wells. Except for the two ends of the same network that indicate the actual position of the wells at the starting and ending points of the dark channels, the rest are evenly arranged. Abandoned karez are marked with the word "abandoned"
, which can be used to mark out underground channels of a certain length. This symbol is also used to represent 4.2.10. When crossing valleys, roads or ditches, if the length of the water or water pipe water ferry is greater than the symbol size, it is represented according to the scale. If there is a special name, the name is added, and the abandoned water trough is marked with "abandoned".
4.2.11 For water-passing channel facilities built in the mountains or underground, see 4.2.2 for the exit numbers.
When the head of the channel intersects with railways, highways, rivers and other planes, siphon-type water-passing channels are set up under the road or underwater. 4.2.13 Water-passing or traffic bypasses built under structures such as roads and dams. Culverts attached to highways should be marked, and moisture retention in vortices attached to mechanized farming roads and the roads below them is not marked. 4.2.14 Ditches that are usually dry and only have water accumulation for a short period of time after rain, and are not dug into a surface or abandoned. On the map, widths less than 0.5mm are indicated by a single line, and those greater than 0.5mm are indicated by double lines according to the scale. Dry ditches with a depth less than 0.5m (1+5000 topographic map) and less than 1m (1+10000 topographic map) or a length less than 10mm on the map are generally not indicated. Those with a depth greater than 2m should be marked with protection. Old war lemons are also indicated by this symbol and annotated with "war amount". Waterlogged land or artificially excavated water or water bodies with a wide width and slow water volume changes, 4.2.15
The tidal shoreline is determined by the position of the normal water level: the fan sugar shoreline is generally determined by the edge line of the dam. The area less than 2mm to 4mm of the pool increase is generally not indicated. The area less than 2mm in the water-scarce area can be expanded to 2mm. The filtration increase is generally only taken as the sum, not the comprehensive but5m1+5000 topographic map) and less than 1m (1+10000 topographic map) or length less than 10mm on the map is generally not indicated. The depth greater than 2m should be marked. The old war lemon is also represented by this symbol and annotated with "war amount". The water on the land is filled with water or artificially excavated water or the water body with wide and slow water volume changes. 4.2.15
The tide shoreline is determined by the normal water level position: the sugar shoreline is generally determined by the edge line of the dam. The area less than 2mm~4mm of the pool increase is generally not indicated. The area less than 2mm in the water-scarce area can be expanded to 2mm. The filtration increase is generally only taken, not comprehensive but5m1+5000 topographic map) and less than 1m (1+10000 topographic map) or length less than 10mm on the map is generally not indicated. The depth greater than 2m should be marked. The old war lemon is also represented by this symbol and annotated with "war amount". The water on the land is filled with water or artificially excavated water or the water body with wide and slow water volume changes. 4.2.15
The tide shoreline is determined by the normal water level position: the sugar shoreline is generally determined by the edge line of the dam. The area less than 2mm~4mm of the pool increase is generally not indicated. The area less than 2mm in the water-scarce area can be expanded to 2mm. The filtration increase is generally only taken, not comprehensive but
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