Some standard content:
Ministry of Water Resources of the People's Republic of China
Notice on the approval and release of "Flood Control and Drought Relief Diagram" SL 73.7-2003
Water Science and Technology [2004] No. 27
All units directly under the Ministry, water resources (water affairs) departments (bureaus) of provinces, autonomous regions and municipalities directly under the Central Government, water resources (water affairs) bureaus of cities with independent planning status, and Xinjiang Production and Construction Corps Water Resources Bureau: After review, the "Flood Control and Drought Relief Diagram" is approved and released as a water conservancy industry standard, and the standard abbreviation is SL73.7-2003.
This standard shall be implemented from May 20, 2004. The standard text is published and issued by China Water Resources and Hydropower Press on February 6, 2004
In order to meet the needs of water conservancy information construction, the "Flood Control and Drought Relief Diagram" is compiled in accordance with the principles and methods stipulated in the "Compilation and Regulations of Water Conservancy and Hydropower Technical Standards" (SL1-2002). The "Flood Control and Drought Relief Diagram" mainly includes the following contents: the purpose and principle of the compilation of the flood control and drought relief diagram, the object and method of coding: - the format of the flood control and drought relief diagram and the content of each element of the diagram; - the explanation of some problems in the flood control and drought relief diagram and the terminology annotation: - diagram.
This diagram is recommended for the full text.
Approval department of this standard: Ministry of Water Resources of the People's Republic of China Organizer of this standard: Office of State Flood Control and Drought Relief Headquarters Organization for interpretation of this standard: Office of State Flood Control and Drought Relief Headquarters Editor of this standard: Tianjin Water Resources and Hydropower Survey and Design Institute of the Ministry of Water Resources Publishing and issuing organization of this standard: China Water Resources and Hydropower Press Main drafters of this standard: Li Kungang, Jie Nongsheng, Wang Qingyu, Zhao Songjie, Huang Kun, Li Min, Ye Peng, Jiang Wenhua, Pang Qingyan
Wu Lifu, Xu Xiangguang, Zheng Yaping
Technical person in charge of the review meeting of this standard: Fu Zengci Reviewer of the format of this standard: Cheng Guangming 1 General provisions
1.0.1 In order to achieve the standardization of flood control and drought relief maps and better realize the sharing of information resources within the water conservancy system, this standard is specially formulated:
1.0,2 This standard is applicable to the compilation of electronic maps, printed maps and other related map types with a scale of 1:50,000 or less in flood control and drought relief maps.
1.0.3 This standard specifies the symbols, colors and grades and specifications of the key topics of flood control and drought relief on flood control and drought relief maps, as well as the principles, requirements and basic methods for using this standard. 1.0.4 In addition to complying with this standard, the presentation of geographical basic elements in the preparation of flood control and drought relief maps shall comply with relevant standards. 1.0.5 Main relevant standards:
Administrative Division Code of the People's Republic of China (GB/T2260-1999) 1:5000 1:10000 Topographic Map Format (GB/T5791-93) 1:25000 1:50000 1=100000 Topographic Map Format (GB/T12342-90 Classification and Code of Basic Land Information Data (GB/T13923-1992) Map Printing Specification (GB/14511-93) 1:1000000 Topographic Map Compilation Specification and Format (GB/T14512-93' 1:250000 Topographic Map Compilation Specification and Format (GB15944-95) Digital Map (GB/T18315-2001) Design Code for Embankment Engineering (GB50286-98) Technical Terminology Standard for Water Conservancy and Hydropower Engineering (SL26-92) Drawing Standard for Water Conservancy and Hydropower Engineering (S1.73.1~6-95 (Regulations on the Compilation of Basic Information Codes for Water Conservancy Projects) (SL.213-98) "City and National River Name Code" (SL249-1999) "National Reservoir Name Code" (SL259-2000) "China Water Gate Name Code" (SL262-2000) (China Flood Storage and Detention Area Name Code) (SL263-2000) Water Gate Design Code (SL.265-2001)1
2.0.1 Flood control and drought relief map
2 Terminology
Flood control and drought relief map Thematic maps used for flood control, moisture control, ice prevention, drought resistance and wind prevention. 2.0.2 Thematic map
thcmatic map
A map that differentially represents one or more thematic elements and the relationship between them 2.0.3 Electronic map
electronicmap
It has the symbolic data characteristics of a map and can be displayed quickly, and is an ordered data set that can be read by people 2.0.4 Map projection
map projection
The theory and method of projecting points and lines on the earth's ellipsoid onto a plane according to certain mathematical rules. shcctlincsystem
2.0.5 Map division
For the convenience of surveying, printing, management and use, the method of dividing map sheets according to certain forest systems and specifications. Hhasicmathematics ofmap
2.0.6 Mathematical basis of map
Mathematical elements such as longitude and latitude grid, coordinate grid, geodetic control points, scale, etc. that keep a certain correspondence between various geographical elements on the map and the corresponding ground scenery. 2.0.7 Amount of details
The number of symbols and notes in the map outline.
2.1.8 Notes
A general term for words and numbers on the map, which are used in conjunction with symbols to explain the name, meaning and quantitative characteristics of various elements of the map.
2.1.9 Diagram
cartographie: symiwl
Various prescribed symbols in the map to represent the form and characteristics of landforms, 2.0.10 Legend
Legendbzxz.net
In a single map or atlas, the explanation of the relevant symbols arranged in appropriate positions on the map for easy reading and use.
2.0.11 Coding
Give things or concepts (coding objects) symbols with certain regularity, which are easy for computers and people to recognize and process.
3 General provisions for cartography
3.0.1 All materials used in the preparation of maps should be systematically sorted, comprehensively analyzed and fully checked. All kinds of maps should have prominent themes.
3.0.2 Mathematical basis of maps. In addition to schematic diagrams, other maps should be marked with longitude and latitude grids or coordinate grids, scales, and attached with projection types, coordinate systems, elevation benchmarks, etc.: 3.0.3 Drawing configuration and external decoration:
--The font, font size and placement of the map name should be determined according to the size of the map and the overall layout of the map.--Inner map should be drawn. The design of the decorative frame can be determined according to the requirements.一一一The arrangement of legend content should follow a certain logic. The legend can be placed in the lower left or right corner of the inner map outline or outside the left or right frame.
The editing and publishing unit, date, reference materials, etc. are placed in the lower left or right corner outside the lower map. The map number is placed in the upper left or right corner of the upper map frame. The font and font size can be determined by the size of the image frame and the blank part, and the overall effect of the map. 3.0.4 The size and sub-frame should be determined according to the needs of the user and the data storage situation. 3.0.5 The map should be personally coded. If there are national standards or industry standards, their standard coding should be implemented. For elements without standard coding, designers can refer to relevant standards to design them by themselves. The coding principles and methods should be explained in the data usage instructions. 3.0.6 Data stratification. It should be divided according to the needs of making thematic maps and refer to relevant standards. The stratification principles and stratification schemes should be explained in the data usage instructions. 3..7 The data collection steps and mathematical accuracy requirements of electronic maps shall be implemented in accordance with relevant national standards: 30.8 Quality requirements for printed maps. The error of each color set shall not exceed 0.21Tim. Symbols, notes, lines, and surface fillings shall be full, bright, and clear. The colors of the printed maps shall be consistent. 3
4 Flood control and drought relief map format
4.1 Instructions for use of the diagram
4.1.1 This diagram specifies the symbols, notes, and colors of various elements in the flood control and drought relief map. 4.1.2 When using this diagram, symbols can be appropriately supplemented according to the needs of the map. 4.1.3 The scale of various symbols and notes in this diagram can be appropriately enlarged or reduced according to the specific circumstances such as the size of the map, scale, and content load.
4.1.4 The representation methods of geographical basic indices not specified in this diagram shall be based on the relevant scale national standard map diagram and surveying and mapping industry standard map diagram.
4.1.5 This diagram uses additive and subtractive coloring to represent the same color in the color column. The value range of R, G, and B in the additive coloring method is 0-255. The value range of C, M, Y, and K in the subtractive coloring method is ~100%. The setting of the R, G, and B values in the standard is determined by the values of C, M, Y, and K: In the AdabePhoushup software, the color setting is "Web Graphics Default Setting", and the R, G, and B are shown in the following. 4.1.6 The main color of the symbol colors in this diagram must be consistent with this standard when making electronic maps. The color hue, saturation and brightness can be adjusted appropriately.
4.1.7 The scale range of large-scale maps in this diagram is 1:50,000~-1:100,000 scale maps (including 1:50,000 and 1:100,000), the scale range of medium-scale maps is 1:100,000 1:100 square scale maps (excluding 1:100,000 and 1=1 million), and the scale range of small-scale maps is 1:1 million and smaller scale maps. 4.1.8 General provisions
1 Symbol size:
11 The size marked with numbers next to the symbol is in millimeters: 21 The number at one end of the linear symbol, the single line refers to its line width, the two parallel lines refer to the width of the line thickness, and the size that needs to be specially marked on the symbol is drawn with dotted lines; 3] In general, the line width is 0.15mm, and the angle of non-straight line segments is 45 or 60° 2 The positioning point and positioning line of the symbol:
1) Simple geometric symbols (such as circles, rectangles, etc.) are the center of their geometric figures: 2) Broad-bottom symbols (such as TV transmission towers, etc.) are the center of their bottom lines: 3] Symbols composed of geometric figures are the center points or intersections of the figures below; 4) Other symbols that are not drawn to scale (such as bridges, aqueducts, locks, etc.) are the center points of the symbols; 5] Linear symbols (such as rivers, roads, embankments, etc.) are the center lines of the symbols: 3 Direction and configuration of symbols. Except for those that are required to be expressed in true direction (such as sluice gates), all other independent feature symbols are perpendicular to the southern map outline:
Symbol name
a. Perennial river
h. Seasonal river
c. Disappearing river section
d. Underground river section
Ancient river channel
「. High water boundary
a. According to scale
b. Not according to scale
b, Grand Canal
h, Other canals
b, Grand Canal
b: Qishi Canal
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Line 100
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225250
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225250
Brief description
The waterline of rivers, streams, canals, lakes, reservoirs and ponds is generally measured according to the water level at the time of mapping (or photography). If the water level is too different from the normal water level, a mapping scale can be added or the normal water level can be used for mapping as needed. Depending on the needs of the map, rivers and channels with fixed water flow directions should indicate the flow direction, and river sections affected by tides need to indicate the tidal current. 1 River
River refers to the channel for discharging water on the land surface. It is a general term for rivers, streams and streams. a. Perennial river refers to a river with water all year round. Perennial rivers with a width less than F0.4mm on the map are indicated by a single line of 0.1mm~0.4mml. ; Those with a width greater than 0.4mm on the map are represented by double lines according to the scale. b. Seasonal rivers refer to rivers with water seasonally. When surveying and mapping, the upper boundary of its new sediment (silt) is used as the waterline, and the standards for single or double lines are the same as those for perennial rivers. The symbol for a single-line seasonal river can be drawn with a real length of 0.5mm~3.0mm according to the length of the river, and a blank part of 0.3mm~1.0mmc. A vanishing river section refers to a river section where the river flows through swamps, sandy areas and other areas, where the riverbed is not obvious or the surface water disappears. Double-line vanishing rivers are mapped with double rows of dots and lines, and single-line vanishing rivers are mapped with single rows of dots and lines. d. An underground river section refers to a river section where the river flows underground, also known as a dark river or underground stream. When depicting, circles are drawn at the location where the water flows in and out:
e: A convex river channel refers to a river channel abandoned in the geological period or the human history period. Use dark blue It is indicated by a dotted line and its name is added. f. The high water boundary is the shoreline formed by the commercial water level in the rainy season. It is indicated by a brown dotted line. 2 Canals
Canals refer to artificially constructed waterways for navigation, irrigation, water diversion, drainage and water supply. Canal map 1 Width greater than 0.4mm is indicated by double lines according to the scale; Width less than 0.4tum on the map, larger canals are indicated by b, and the rest are indicated by.
bl Symbol positioning line is the lower straight line of the symbol. 3 Channels
Channels refer to artificially constructed waterways for water diversion, drainage and irrigation. Width less than 0.4muⅡ on the channel map is indicated by double lines according to the scale; Width 0.2zmm～0.4mm is indicated by a single line of 0.4mm; Width less than 0.2mm is indicated by a single line of 0.2mn.
Symbol name
a, perennial lake
h. Inch lake
c. Dry riverbed,
Dry broad lake
According to scale
Mountain not according to scale
h Medium
hiAccording to scale
hz not according to scale
.Small
eAccording to scale
2Not according to scale
d. In construction
dLarge
Small Small
. Planning
Symbol
Line 100
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17225|250
Point 10070
Line 100
Line 100
Line 100
100j100
Line 100
100100
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19923425
174239
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4Lakes
Brief description
a. Lakes and the water bodies they contain are called lakes. The lake basin is a natural inflow area on the surface that can intercept water. b. Perennial lakes refer to tidal lakes that have water all year round, and seasonal lakes refer to tidal lakes that have water seasonally or intermittently. Only lakes with an area greater than 0.5rmm2 are shown on the map. Important lakes should be shown as large as 0.5rmm2. Non-freshwater lakes should be refilled with water. Oxbow lakes and narrow strips of lakes with a length greater than 3mm on the map and a width greater than (.4rnm are represented by double lines, and those less than 0.4rum are represented by single lines according to shape characteristics. Oxbow lakes refer to bow-shaped lakes formed by silting up of abandoned curved river channels after the free meanders of rivers are straightened. c. Dry riverbeds and dry and wet tides refer to riverbeds or lake basins that are often dry and only have water for a short time after rain or snowmelt. Ten riverbeds Figure 1. Those with a width greater than 0.4mm are represented by double lines according to the scale; those with a width less than 0.4mm are represented by single lines. . The real length of the dry riverbed symbol can be drawn as 0.5mm~3.0mm according to the length of the dry riverbed, and the blank part is 0.3mm-1.0mm.
5 Reservoir
Reservoir refers to the construction of retaining dams or weirs, water-retaining walls in rivers, valleys, low-lying areas and underground permeable layers to form artificial lakes for water collection.
Reservoirs are divided into large, medium and small according to their storage capacity. A large reservoir has a total storage capacity greater than or equal to 100 million m2; a medium-sized reservoir has a total storage capacity greater than or equal to 100 million m2 and less than 100 million m2; a medium-sized reservoir has a total storage capacity greater than or equal to 100 million m2; a medium-sized reservoir has a total storage capacity greater than or equal to 100 million m2 and less than 100 million m2; a medium-sized reservoir has a total storage capacity greater than or equal to 100 million m2. A reservoir with a volume greater than or equal to 0.001 billion m3 and less than 0.1 billion m3 is a small reservoir.
Reservoir areas greater than 2 mm2 on the map are represented by surface symbols according to the scale; reservoir areas less than 2 mm2 on the map are represented by point symbols not according to the scale. A reservoir under construction indicates its dam site and water range, and annotates "under construction" under the name of the reservoir.
The point symbol is located at the geometric center of the symbol, due north. Serial number
Symbol name
b. Class II weir
n. Class III dike
a, large sluice
semi-scale
ai2 or scale
. Medium sluice
a semi-scale
not scale
, small sluice
symbol
line marking a15
line marking 0.15
line marking 0.15
line marking 0.3
100100
100100
237 28
6 Embankments
Brief description
Embankments refer to water retaining structures built along the edge of rivers, canals, lakes or flood-carrying areas, flood diversion areas, and reclamation areas to restrict water flow, as well as structures built along the coast to prevent tides and waves. Seawalls refer to embankments built along the coast to prevent tides and waves. Embankments are divided into four categories. In the (Design Code for Embankment Engineering) (GB50286-98), Class I and Class II embankments correspond to this class of embankments, sub-class and class I embankments correspond to Class II embankments, Class V embankments correspond to Class III embankments, and civil embankments correspond to Class IV embankments.
On the embankment slope projection width map, those greater than 0.5mm are drawn with long and short lines according to the scale, and small F0.5mm is indicated by a short line. The symbol positioning line is the symbol center line.
Sluice gates refer to structures with gates opened and closed in rivers and channels to adjust water levels and control flow. a. Sluice gates refer to low-head buildings built on rivers and channels that use gates to control flow and adjust water levels. According to the "Sluice Design Code" (SL265-2001), sluice gates are divided into large, medium and small according to the flow rate. A large sluice gate has a flow rate greater than or equal to 100m/s, a type 10 sluice gate has a flow rate of 100m/s to 1000m/s, and a small sluice gate has a flow rate less than 100in/s. The length of the human-shaped water gate is greater than 4.0mm and is represented according to the scale. The length of the human-shaped water gate is less than 4.0mm and is not represented according to the scale. Medium-sized sluice gates with a length greater than 3.0 mm are indicated on the scale, and those with a length less than 3.0 mm are indicated without scale: small sluice gates are indicated by a, and the symbol positioning point is the symbol geometric center.
b, Ship lock refers to a navigation structure that uses the method of adjusting the water level to allow ships (teams) to pass smoothly through the concentrated water level difference on the channel. Those with a length greater than 1.5 mm are indicated by b, and those with a length less than 1.5 mm are indicated by bz. The symbol positioning point is the symbol geometric center., Culvert gate refers to a sluice gate with a gate installed at the entrance of the tunnel, and a culvert behind the gate, also known as a closed sluice gate or culvert sluice gate. The symbol positioning point is the symbol geometric center. 11
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