Some standard content:
RS 07.040
National Standard of the People's Republic of China
GB/T14912—2005
GH-4912194
1:1000
1:2000
Technical Specifications for 1 + 500 1 1 0001 : 2 000 field digital mapping2005-04-19 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2005-10-01 Implementation
GB/T14912-20C5
Normative references
Data loss control
Micro-wall processing
Digital map testing
Inspection, acceptance and delivery of materials.
GB/T14912-2005
This standard replaces 1191>—1994 Large-scale topographic map machine-aided mapping. Compared with B11.2—194, the main changes are as follows:
． This standard divides the digital surveying and mapping products into two types: pre-production and inter-production. The latter is increased with relevant contents and technical specifications. This standard replaces 5.3 of 14012104 digital record format specification A. This standard is the current specification. This standard is issued by the State Administration of Surveying and Mapping. This standard is issued by the State Administration of Surveying and Mapping, National Institute of Standardization, and the main person in charge of this standard is Xiao Xuenian, ten years old. The previous versions of the standard are B14912-14:1:5001:1 0001#2 000
Technical Specification for Field Digital Mapping
GB/T14912—2005
This standard specifies the technical specifications and accuracy requirements for the creation of digital topographic maps using the method of field digital mapping
This standard applies to the production of digital topographic maps. ? ... GH2312—1%8 Information exchange according to the Chinese coded character set GR/T7923—1995[1500,11300.1:200 Topographic map format GB148041993:30.1:1000.11 Topographic map classification and code B/T177U8—1U09 Geospatial data transformation format GB/T133162001 Inspection, acceptance and quality assessment of digital surveying and mapping products CH/T1005—2000 Basic geographic information technology digital product digital product standard 3 General rules
3.1—Regulations
3.1.1 Field surveying and mapping of digital maps should be carried out by comparing them with the actual site plans, using electronic tablet work methods and digital surveying and mapping methods.
3.1.2 The topographic map produced by the field surveying method (hereinafter referred to as the topographic map) can be divided into spatial database products and cartographic products according to their uses: the classification should be in accordance with the provisions of Table 1. 3.1.3 The data used in the field surveying should be evaluated by the relevant departments and approved by the superior departments. 3.2 Use of datum and projection method
3.2.1 The coordinates of the plane control measurement of the field surveying should adopt the projection plane coordinate system. The deformation of the whole survey area should not exceed 2.5cm/km2.
Table "Data Topographic environmen t and content
weekly special table
digital database product
spatial database and more
geometry
geometry digital products
comprehensively provide children's morphological data, training, supplementary relationship, etc.
through the system code, weekly effect, etc. or the skin suitable agent writing property can also be layered, blue mark, familiar color, special symbol, etc.
does not provide full mapping requirements of geometric figures, notes, familiar color, symbols, etc. 14912—2005
3.2.2 The 1S4-intersection system is also used as the datum for the geodetic datum. The projection surface can be a spherical surface with a nominal average height. The projection surface can be obtained by adding or subtracting the long radius of the sphere to obtain the coordinates. 3.2.3 The double projection method can use Gaussian pseudo-projection or universal transverse inkjet projection (1ITM). The projection zone is usually divided into 3°. The standard zone can be used to cut any line at the center of the year. 3. 2.4 The coordinates of the topographic map should be consistent with the conversion parameters determined by the 1980 system. 3.2.5 The 1485 national standard should be used for high-tech benchmarks, and the conversion parameters can be determined by the 18 regional standards. 3.3 The division and numbering of topographic maps The topographic map should be consistent with the topographic map, and the grid is 10cm×5cm or 50×502m. The coordinates of the points are numbered in kilometers, with the X coordinate in front and the Y coordinate in the back. They can also be numbered in the same order. For the surveyed areas, the original divisions and abbreviations are used.
3.4 Division of terrain types
Heisei: Most of the land is located in the front area, Sanling land: Most of the land with a latitude of 2\-5 to 6\), Stop land: Most of the land is between e~-23, Shanshan: Most of the land is located in the city area In areas above 25: 3.5 Basic contour interval of topographic map
The basic contour version of the topographic map is selected according to the needs of terrain identification and construction. The same scale topographic map shall be used in the survey. When the core filling and other ministers cannot show the landform features, the whole half interval shall be added. In flat areas and urban areas, according to the needs of the standard map, contour lines can be omitted and points are represented by elevation points. Table 2 Basic contour interval of topographic map
2= 2 000
5, 5:2. 9)
Note: The height of the elevation annotation points depends on the route. 3.6 Density of elevation annotation points
1. 063,5)
Land classification
The gain is in meters
Mountain terrain
The number of points to be noted in the product is 5~2 per country: Select the topographic map points or terrain feature points
3.7 Accuracy of topographic maps
3.7.1 Increase the accuracy of the plane position of the point
Topic map: The position error of the three topographic points relative to the ten adjacent points and the error of the distance of the nearby topographic points The difference should not exceed the standard of Table 3. When the survey is simply for general use, the standard indicators in brackets in Table 3 can be selected: When the required resistance has special requirements, the corresponding professional needs of the root zone should be delineated in the technical design. The plane position accuracy of the 3 ground objects is
Regional price category
Yao Town, industrial building area,
Downland, Qiudu land
Comparison of tree size
Point monitoring type ticket
10. 13( [c, 33)
±u.do(±c.)
report near electric structure
point spacing medium carbon stem
In,12(IG,20
+u.24(+6.40)
In4xrto g
hai area funded
xiong area,
Chen Bei again
comparison scale
1 : Suc
1：nm
1: 2omI
3.7.2 Elevation error before connecting the recording point
Table 3 (line)
Point should provide the difference
±u.23±G.4u)
±.0:±1.611
CB/T14912—2005
Single treatment for
Neighboring
Point distance
±c.1$=2.36)
+0.3363.563
10 *41,2G
The elevation error of the project recording point relative to the adjacent map right point should not be greater than 1/1 of the basic contour distance of the terrain. Relax 0. times in difficult areas.
3. 7.3.7.4 The error in the elevation of the interpolated point on the contour line. The error in the elevation of the neighboring map points on the contour line should not be greater than 1.73 of the basic contour line distance on flat land, and should not be greater than 1/2 of the basic contour line distance on mountainous land. 1.1 The error in the elevation of the point on the contour line should not be greater than 2/3 of the basic contour line distance on mountainous land. 3.7.4 The digital elevation model (DEM) generated by field surveying methods is generally used in the construction of an irregular grid. The error in the elevation of the point on the contour line should not be lower than the corresponding elevation point on the terrain. Regular grid EM can be formed within irregular grid TFM. The common grid point error should not be less than ten times the average error of the point inserted from the contour line. According to the actual situation, the grid size can be as small as 1.M10 (m) 25M×13 (m). 2M×10 (m) M. The denominator of the map scale is below.) 3. Topographic symbols and notes
The topographic denominator and notes are determined by the science. For the specified numbers and effect numbers in the map, the professional departments shall require the use of the map and make supplementary delineations in the technical design or other related technical documents. 3.9 Allowable error
Use mean error as standard, three times mean error as model error, 3.10 Instrument accuracy requirements and verification
The accuracy of the distance measurement adopted by the field map should be not less than 10%, and the longitude and latitude measurement of the map should not be less than 10%. The accuracy of the longitude and latitude measurement of the map should not be less than 10%. The final measurement instrument used should be inspected and calibrated in time, and maintenance should be strengthened to keep it in good condition. 4 Map control measurement
4.1 General provisions
4.1.1 For the fourth grade and below, the mean error of the measured value of the control flux relative to the starting node point should not be less than 5 cm, The error between the height of the calculation point and the lowest point of the control point of the fourth grade and above should not be more than 10m. 4.1.2 The error between the position of the basic point and the starting point of the basic calculation point should not be greater than 1:1 of the original contour interval of the map according to the measurement scale ratio: 1:0 1:2 1:2. The height of the elevation should not be greater than 1:1 of the original contour interval of the map. 2.1.3 The number of markers should be set appropriately. The number of markers in the urban construction area and the industrial construction area should meet the requirements of the map selection. 4.1.4 The width of the basic control point (position of the control point of the higher level should meet the requirements of the map quantity ratio: generally less than 4. Table 4 Density of basic control points
Factorization example
Use point
1=2 000
GH/T14912—2005
4.2 Surface control measurement
Surface control measurement can be carried out by using surface control wire (net) polar coordinate method (point method) and cross-section isotropic method. Add surface weight points under each level of control points. It is not advisable to use more than two times. In areas where it is difficult to obtain a good surface control line, it is called a search line. When the surface control line is small, the surface control line can be used as the primary control:
4.2. 1. The main technical requirements for the measurement of the limit conductor are to use a single-center measuring instrument to measure the length of the conductor in the specified direction. The measurement should be repeated for one time and the reading should be less than 23mm. The normal multiplication of the normal receiving positive voltage
115 and 111000 should be 1.5 times the value specified in Table 3. The number of conductor edges should not exceed 15. The bottom difference is not greater than 10, the absolute difference is not more than 1/0.5M×10 conductor length is greater than the specified 1/0 in Table 5, and its absolute closing error should be C.3×MX13- (m). Table 5 Technical indicators of line finding measurement: , method of measuring station, greater than 1 of the maximum measuring distance of the production point, no temperature control and other practices Difference control When the wiring of the base conductor is not missing, the length of the branch conductor should not exceed 1/3 of the length specified in Table 5, and the side effect should not be more than 2. The half angle should not be greater than 1" by using a 15-type instrument. The instrument should be used for single-direction measurement. 4.2.2 Polar coordinate method (point method) When using the center coordinate method to measure, the measurement should be done in the same direction. The control point is followed by the basic point work: and the two directions of the mouth should be measured. The main technical requirements should be followed by the period table 6. The side length should be measured according to the medical ratio: 1.52 should not be greater than 350m1000 should not be: 2 large
adopt the polar coordinate method to measure the map points, and it will not be developed again. Table 6 Polar coordinate method measurement technical indicators
within the application of one full
Note: Based on the same height,
4, 2.3 Intersection method measurement
half-measurement wave difference
measurement result difference
layout difference
two groups of calculation accuracy
new points can be measured by inspection side intersection and pre-measurement intersection. The actual intersection angle should be between 430\150°, the length of the intersection side should not exceed .xM(m), and the accuracy obtained by group calculation should not be greater than .2×Mx(m). 4.3 National elevation control measurement
The commercial use of basic points in the map should use basic leveling, electromagnetic distance measurement and triangulation. 4.3.1 National basic leveling
The basic leveling can be distributed along the map poles as a combined descending line, a combined stepping line or a node network: The basic leveling measurement should be connected to a high control point of not less than the fourth degree. The technical requirements shall be implemented in accordance with the provisions of the table. When the leveling road is shallow and becomes a branch line, round-trip observation should be adopted, and the road length should be greater than 2.5km: When the permanent standard route is composed of a single station, the length of each branch line should not be greater than 3.?The normal multiplication of the positive and negative lines
115, 111000 is 1.5 times of the value specified in Table 3 for the length and width of the conductor. The number of conductors should not exceed 15. The minimum required error should not be greater than 10. The absolute error should not exceed 0.5M×10. The conductor length is less than 1/1 of the standard in Table 5. The absolute closure error should be C.3×MX13- (m). Table 5 Technical indicators of root line tracing measurement
Reduction method: The measurement station is greater than 1 of the maximum measuring distance of the production point
, no
temperature control
and position control
When the root conductor is not completed, the length of the branch conductor should not exceed the table 5 1/3 of the length specified in the regulations, the side effect should not be more than 2 kills, always use 15-type instrument to measure the left and right, there are two tides: the total medical group is not more than 1", and the instrument is used for single-direction measurement.
4.2.2 Polar coordinate method measurement (point method
When using the center coordinate method to measure, it should be carried out at the same control point in accordance with the basic point of the map: and the two directions of measurement should be changed. The main technical requirements should be followed in Table 6. The side length should be measured according to the medical ratio: 1.52 should not be greater than 350m1000 should not be: 2 large
Use the polar coordinate method to measure the map points, and it will not develop again. Table 6 Polar coordinate method measurement technical indicators
The internal implementation is full of
Note: Based on the same height,
4, 2.3 Intersection method measurement
Half-wave difference
Measurement error
Layout error
Two groups of calculations are used to calculate the standard deviation
The basic solution of the new point can be adopted by the inspection side intersection and the pre-measurement intersection. The intersection angle should be between 430\150°, and the intersection side length should not exceed .xM(m). The standard deviation obtained by group calculation should not be greater than .2×Mx(m). 4.3 National height control measurement
Basic point business It is hoped that the correct basic leveling and electromagnetic distance measurement and triangulation will be used: 4.3.1 Basic leveling measurement
The constant level of the map can be distributed along the map pole as a descending line, a stepping line or a node network: The basic leveling measurement should be connected to a high control point of not less than the fourth degree. The technical requirements shall be implemented in accordance with the provisions of the table. When the leveling road is shallow and becomes a branch line, round-trip observation should be adopted, and the road length should be greater than 2.5km: When the permanent standard route is composed of a single station, the length of each route should not be greater than 3.?The normal multiplication of the positive and negative lines
115, 111000 is 1.5 times of the value specified in Table 3 for the length and width of the conductor. The number of conductors should not exceed 15. The minimum required error should not be greater than 10. The absolute error should not exceed 0.5M×10. The conductor length is less than 1/1 of the standard in Table 5. The absolute closure error should be C.3×MX13- (m). Table 5 Technical indicators of root line tracing measurement
Reduction method: The measurement station is greater than 1 of the maximum measuring distance of the production point
, no
temperature control
and position control
When the root conductor is not completed, the length of the branch conductor should not exceed the table 5 1/3 of the length specified in the regulations, the side effect should not be more than 2 kills, always use 15-type instrument to measure the left and right, there are two tides: the total medical group is not more than 1", and the instrument is used for single-direction measurement.
4.2.2 Polar coordinate method measurement (point method
When using the center coordinate method to measure, it should be carried out at the same control point in accordance with the basic point of the map: and the two directions of measurement should be changed. The main technical requirements should be followed in Table 6. The side length should be measured according to the medical ratio: 1.52 should not be greater than 350m1000 should not be: 2 large
Use the polar coordinate method to measure the map points, and it will not develop again. Table 6 Polar coordinate method measurement technical indicators
The internal implementation is full of
Note: Based on the same height, bzxZ.net
4, 2.3 Intersection method measurement
Half-wave difference
Measurement error
Layout error
Two groups of calculations are used to calculate the standard deviation
The basic solution of the new point can be adopted by the inspection side intersection and the pre-measurement intersection. The intersection angle should be between 430\150°, and the intersection side length should not exceed .xM(m). The standard deviation obtained by group calculation should not be greater than .2×Mx(m). 4.3 National height control measurement
Basic point business It is hoped that the correct basic leveling and electromagnetic distance measurement and triangulation will be used: 4.3.1 Basic leveling measurement
The constant level of the map can be distributed along the map pole as a descending line, a stepping line or a node network: The basic leveling measurement should be connected to a high control point of not less than the fourth degree. The technical requirements shall be implemented in accordance with the provisions of the table. When the leveling road is shallow and becomes a branch line, round-trip observation should be adopted, and the road length should be greater than 2.5km: When the permanent standard route is composed of a single station, the length of each route should not be greater than 3.?The distance protection is more important than that of the station. The data of each station is collected at a high temperature. The station shall monitor and re-calibrate the direction when the data is collected. If the test results exceed the two specified values of the center, the research points measured before the control measurement shall be recalculated. The center of the sky should be measured, and the two scattered points should be measured. 5.4.1 The measurement records of the lower points include the location number of the weak measurement point, and the instrument can code the observation point with height. Elevation, inclination, right angle, uneven angle, continuous change point, close information, etc. The format can be specified. 5.4.2 The requirements for classification and coding used by the data collection machine can be implemented by users. After the data is completed, the classification and coding used shall be in accordance with the provisions of (514%34-1393). 5.4.3 The field data record file shall be a text file. The format may be specified in the specification. When submitting or submitting, the complete data set shall be 5.5. 5.5.1 Point-shaped features (independent features) shall be selected according to the actual shape when the proportion cannot be expressed directly. When the proportion cannot be expressed directly, the positioning points or line points shall be accurately determined: the point-shaped features with patch characteristics shall be selected first, and then the vertical points (lines) shall be selected. 5.5.2 The overlapping parts of the boundary lines of linear features and surface features with common boundaries can only be selected once, but the relationship between various features shall be handled well: 5.5.3 When the shape is averaged, the coordinate rate of the feature points shall be appropriately increased according to the change of the measurement to ensure the accuracy of the model line. 5.5.4 When the sampling of some points and the control survey are carried out simultaneously, the coordinates of some points shall be based on the time. The coordinates of the control points after the plan is flattened are calculated again. When the control plan or material verification exceeds the limit, the single control point should be measured, and the new control point coordinates should be calculated. 5.5.5 When collecting data, in addition to avoiding the provisions of 2, the spatial data must be collected according to the requirements of the product or the building components, and the required qualitative data should not be gradually collected. Attribute items, attribute data types, codes and record formats may be in accordance with industry standards. And they should be explained in the technical design book or relevant technical documents. E.6 The selection of internal security items 5.6.1 The method and collection of the abandoned items of this landform. In addition to the relevant methods of CB/T525-15, the following significant provisions shall also be followed. 5.6.2 All kinds of changed objects and buildings need to be recorded in the table. The data of the potential hazards should be collected. For the sake of abundance, temporary buildings outside the river should be excluded. For the main and auxiliary buildings, the scale of the building should be measured. When the elevation of the main and auxiliary buildings is less than 0.5m, the following should be considered:
5.6.3 The internal turning points of the ground pipelines should be measured. The vertical part of the wire poles and the attached parts should be properly indicated. 5.6.2 The water system should be measured according to the actual shape. The water level should be measured and recorded, and the depth should be marked. The top and foot of the dam should be measured and recorded, and the depth of the whole water direction should be measured and recorded: 5.6.5 The land tax should be indicated by contour lines. The characteristics of the book cannot be indicated by the same level. The seat should be indicated by symbols. The elevation points of the mountain fill, the part of the mountain, the valley and the slope change should be measured. 5.6.6 The exposed, independent, Buddha mouth block bottom hole is higher than the basic height, the slope, the hole is smaller than the basic height, or the length of the map is less than 5m. When the length is less than 5m, it can be removed. 5.6. The year is divided into several seasons and different crops are planted. The main crops are in summer: the boundary of the variable and linear features are repeated.
5.e. The names of the buildings with names such as the Japanese people's land, the beauty of the machine, the school, the mountain, the certificate flow, etc. are marked. 5.7 Density of topographic points
Electro-tectonic points can be generally determined according to: the center of the table, the ground vehicle line and the fault line sound-controlled terrain change increase the sampling point density E
proportional center
topographic year
5. Distance length of broken points
Table 9 Distance between topographic points
11 E30
Ji1ono
B/T14912—2005
Unit 5 meters
The maximum length of the distance measurement of the broken points is generally determined according to the items in Table 10. In case of special circumstances, the distance measurement length of the broken points can be appropriately extended under the premise of ensuring the error of the broken points:
Table 10 Distance measurement length of the broken points
Maximum distance length method
5.9 Data reading
i: - x:
Year to meter
1 : 2
Effective with collection and printing. Water load, heavy vertical free record car should be measured center division war cup height plate full single to, measure the number of full bright meter, zero check and vertical measure mark difference not much Ding 1
5.10 Sa surrounding drawing
Use digital to let mode, the most should be given to Chinese medicine, give the map to the collection of landforms, the original above careful /T72S "995 of the current system, for the complex map can be commercialized or defined, but the distance code used in data collection, must be one-to-one with the symbol drawn in the sketch) The map must mark the point abbreviation of the traced point, the marked point number and the point number in the data collection record are strictly consistent.
) The relative position of the topographic map must be clear and correct,) The name of the species and the nature of the landform annotated on the topographic map must be accurate and clear on the sketch. E.1 Data processing principles 6.1.1 Field data should not be processed arbitrarily. 6.1.2 Data should be processed in a timely manner and properly analyzed. 6.1.3 Data should be processed by software, including all documents, instructions, medical cases, etc. and non-linear diagrams specified in 3/T79291. 6.1.4 Chinese character code should be in accordance with GB2312103U. 6.2 Data processing and verification 6.2.1 Field data, including data collected from foreign sources, should be processed in a timely manner to form a header, and the data should be sorted and verified, and compared with the data. 6.2.2 When there is a contradiction in the inspection, such as errors in the verification system, the local source should be verified according to the limit. Correction list: If there are errors in the data recording, the point number, vertical, distance, elevation, etc. that are not allowed to be modified can be modified. The data must be returned to the second currency plan
6.2.3 Delete or mark the invalid record, and supplement the actual measurement. Only the single distance record that was not recorded in time should be saved. 6.2. The data after the revision should be saved and prepared. 6.3 Data splitting
6.3.1 The data of the potential database product should be divided into stratification according to the provisions of Table 11-2. GB/T14912-2005
To the base control point
Gube method
Second security construction service
Main layer name
Measurement single type point
Change the soil
|Layer name code
Table 11 Blank Database product hierarchical layer name code provisions narrow
point porridge, surface
point line. Surface
, missing, all
point, I
point line. Still
point, road
continuation, past
although the code
fishery control state point
1 road note (structure> breeding and its affiliated facilities
air oil transport and In addition to the management of facilities and their attached high objects, water strips and attached methods, landscape, soil protection, etc., elevation points, decoration, landscaping, mapping data, production and layer name code, points, & points, lines, points, lines, sections, social records, Cecle Elunn
Crxel:
Cade Eleretica
Main content
Thank you for the control point
Leave the certificate, register
Work for the change of structure and its idle equipment specification
Transportation point transmission method facilities
Line must be its sequence high objects
Water system and ancillary facilities
Landform and soil
High line, commercial accumulation point
Map the whole
According to the needs, each layer is divided into detailed layers, the layer name should be scientifically named, the layer name code is now: 6.3.2
Detailed layer in the rich layer age number
Main code
.3.3 Under special circumstances, different classes can be combined into one layer, or different classes can be combined into one layer by taking a zone of points. 6.3.4 The image data should be separated and separated.
6.3.5 When the stratification is increased from 1 layer to the next layer, the stratification scheme should be described in the technical data collection and metadata file. 6.4 Height distribution processing
GB/TI4912—20J5
6.4. The height distribution model should be improved and the height distribution units should be established and processed. The mathematical model (or height distribution line) of the military database products should be continuous and non-inverse, and should not be divided into buckets and formed by comparison. The height distribution lines of the local products are arranged according to the 92-1995 standard 67.? The relevant current situation is the tenth
6.4.2 It is recommended that the digital ground floor model should be sized, and the light distribution card should be equipped with the display of the new crack line and the micro-attenuation to ensure the originality of the landform. 6.4.3 When generating the contour line, it is necessary to use strict calculation and carefulness. 4.4 The contour line should be compared with the actual situation. The format error should be corrected when the contour line is generated. 6.5 Data file format
6.5.1 After the digital device processes the light, the data file is collected as a unit and processed and replaced in units of width. The organization and layout of the product can be implemented according to the relevant provisions of CT/T10n52000. 6.5.2 Each software is called to ensure that the data is automatically exchanged and managed in the specified data format. The data information exchange format between different systems shall be formulated in accordance with the provisions of CT1177U8-1999. 6.5.3 The data file should be a central file. Each map should have a metadata file. The metadata items should be processed according to the provisions of the appendix to this standard. 6.E Data processing principles for spatial database products 6.6.1 General provisions Developed data processing should be carried out uniformly with the area or sub-area as the unit. The relationship should be established according to the needs of the period. When the standard map sheet or special requirements are not met, it should be ensured that the terrain is in the adjacent map sheets. The geometric figures should be in the same relationship. The lines must be smooth, natural, without pressure and without egg objects. 6.6.2 Graphic data The system should be closed and the system should be able to mark the shape. The line period is fast and continuous, the fat plan does not exist, the gold production line plan is sensitive and trustworthy, and the new phenomenon of the point connection must be maintained:
! There is a possible case, and its direction is always correct. The symbol representation format shall comply with the relevant provisions of /7020-1. 6.5.3 Wind data
E: According to the description of the attributes of each terrain element, the plastic quality shall be complete: (B1419 or the requirements of the technical table specified in the national standard, there should be no omissions.
Point practice, in the property table, the section name, section type, field length, field sequence, screen properties and attribute recovery values shall be accurate:
G.6.4±Record
a! The name and annotation of the winter and the annotation and their instructions shall be accurate, without errors or omissions.) The records should be as large as possible, and the number of characters, the character system, etc. shall comply with the provisions of 7329-1. In special circumstances, the characters can be reduced, and the minimum value H shall not be smaller than 2m. 6.6.5 Data stratification All data should be stratified according to the requirements of 6.3.2. The data stratification should be correct without duplication or overlap. 6.6.6 Connection The connection error of any graphics should not be greater than 3.0. The topographic plane of the corresponding figure should be 2 times higher than the reference plane, and the topological consistency of the data should be ensured. 7 Principles of map production products E.7.1 Residential area a) There should be a reference to the location of the district and the road. 2.
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