Specifications for estate surveying--Unit 1:General rules for estate surveying
Some standard content:
GB/T 17986. 12000
This standard is formulated on the basis of the real estate measurement specification issued by the State Administration of Surveying, Mapping and Geoinformation in May 1991, combined with the recent development of science and technology and production needs, and with reference to relevant standards and regulations at home and abroad. GB/T17986, under the general title of "Real Estate Measurement Specification", includes the following two units: Unit 1: Real Estate Measurement Regulations" and "Unit 2: Real Estate Map Schema".
Appendix A of this standard is the standard appendix; Appendix B is the suggested appendix. This standard is proposed by the Ministry of Construction and the State Administration of Surveying, Mapping and Geoinformation. This standard is managed by the Ministry of Construction and the State Administration of Surveying, Mapping and Geoinformation. This standard is drafted by the Surveying and Mapping Standardization Institute of the State Administration of Surveying, Mapping and Geoinformation, Nanjing Housing Property Supervision Office, Housing and Real Estate Department of the Ministry of Construction, National Land Surveying and Mapping Department, Guangzhou Real Estate Surveying and Mapping Institute, Property and Registration Department of Xi'an Real Estate Administration Bureau and other units. The main drafters of this standard are: Ang Yongjiang, Hua Ruhong, Tang Guofang, Liu Dake, Huang Baohua, Yue Daxiao, Meng Juan. 1 Model drawing
National Standard of the People's Republic of China
Specifications for estate surveyingUnit 1:General rules for estate surveyingGB/T 17986. 1—2000
This standard specifies the content and basic requirements of urban real estate measurement, and is applicable to the real estate measurement of built-up areas of cities and towns, industrial and mining enterprises and institutions outside built-up areas, and their adjacent residential areas. Real estate measurement in other areas can also be implemented by reference. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard shall discuss the possibility of using the latest versions of the following standards. GB/T2260—1995 Administrative division code of the People's Republic of China GB6962--19861·500, 11000, 12000 scale topographic map aerial photography specification GB/T17986.2--2000 Real estate measurement specification Unit 2: Real estate map diagram CH1003—1995 Surveying and mapping product quality assessment standard 3 General provisions
3.1 Purpose and content of real estate measurement
3.1. 1. Real estate measurement day
Real estate measurement mainly collects and expresses relevant information about houses and housing land, and provides data and information for real estate property rights, property registration management, real estate development and utilization, transactions, tax collection, and urban planning and construction. 3.1.2 Basic content of real estate measurement
The basic content of real estate measurement includes: real estate plane control measurement, real estate investigation, real estate element measurement, real estate map drawing, real estate area measurement, change measurement, inspection and acceptance of results data, etc. 3.1.3 Results of real estate measurement
The results of real estate measurement include: real estate thin 3.2 Basic accuracy requirements for real estate measurement
3.2.1 Accuracy index and tolerance of real estate measurement This standard uses the mean error as the standard for evaluating accuracy and twice the mean error as the tolerance. 3.2.2 Basic accuracy requirements for real estate plane control measurement The relative mean error of the last-level adjacent basic control points shall not exceed 10.025m. 3.2.3 Accuracy of real estate sub-plot plan and real estate key measurement 3.2.3.1 The mean error of the ground feature points on the real estate sub-plot plan measured by the simulation method relative to the adjacent control points shall not exceed ±0. 5 mm.
Guohao Quality and Technical Supervision Bureau approved on 2000-02-22, implemented on 2000-08-01
GB/T 17986.1—2000
3.2.3.2 When using existing cadastral maps and topographic maps to compile property sub-maps, the mean error of the position of the feature points relative to the adjacent control points shall not exceed ±0.6 mm on the map.
3.2.3.3 For real estate element points and landform points measured by methods such as full field data collection or field analytical measurement, the mean error of the point position relative to the adjacent control point shall not exceed ±0.05 m
3.2.3.4 When the existing coordinates or existing maps are used to draw the real estate parcel, the mean error of the drawing shall not exceed ±0.1 mm on the map. 3.2.4 Accuracy requirements for real estate boundary points
The accuracy of real estate boundary points (hereinafter referred to as boundary points) is divided into three levels. The position error of each level of boundary points relative to the adjacent control point and the spacing error of adjacent boundary points with a spacing of more than 50 m shall not exceed the requirements of Table 1; the spacing error limit between boundary points with a spacing of less than 50 m shall not exceed the calculation result of formula (1).
Table 1 Precision requirements for property boundary points
Boundary point grade
Where: m,
Point error of boundary point relative to adjacent control point and tolerance of spacing error between adjacent boundary points
AD =±(m,+0. 02mD)
Point mean error of boundary points of corresponding grade, m; - distance between adjacent boundary points, m;
AD - limit of difference between calculated side length of boundary point coordinates and actual side length, m. 3.2.5 Precision requirements for house corner points
Mean error
When it is necessary to measure the coordinates of the house corner points, the accuracy grade and tolerance of the house corner point coordinates shall be implemented in the same standard as that of the boundary points; when it is not required to measure the coordinates of the house corner points, the house shall be represented on the property map according to the accuracy requirements of 3.2.3. 3.2.6 Precision requirements for property area
The precision of property area is divided into two levels, and the tolerance and mean error of each level shall not exceed the results calculated in Table 2. Table 2 Precision requirements for property area
Precision level of property area
Note: S is the property area + m2.
3. 3 Measurement benchmark
3. 3.1 Coordinate system for real estate measurement
0. 02 VS +0. 000 tS
0. 04 VS+:0. 0025
0.0810.0065
Mean error
0. 01 / +0. 000 3S
0. 02 s +0. 001S
0. 04 s+0. 0035
Real estate measurement should adopt the 1980 Xi'an coordinate system or the local coordinate system. When the local coordinate system is adopted, it should be measured in conjunction with the national coordinate system. 3.3.2 Plane projection of real estate measurement
Gauss projection is uniformly adopted for real estate measurement.
3.3.3 Height measurement benchmark
Real estate measurement generally does not measure height. When height measurement is required, it shall be specified separately in the design document. The height measurement adopts the 1985 national height benchmark.
4 Real estate surface control measurement
4.1 General provisions
4.1.1 Principles for the layout of real estate plane control points GB/T 17986, 1—2000
The layout of real estate plane control points shall follow the principle of grading from the whole to the part, from high level to low level, and can also be laid across levels. 4.1.2 Contents of real estate plane control points
Real estate plane control points include second, third, and fourth level plane control points and first, second, and second level plane control points. Fixed signs shall be buried at real estate plane control points.
4.1.3 Density of property plane control points
The average spacing of control points in densely built areas is about 100m, and the average spacing of control points in sparsely built areas is about 200m. 4.1.4 Methods of property plane control measurement
Property plane control measurement can be carried out by triangulation, trilateral measurement, traverse measurement, GPS positioning measurement and other methods. 4.1.5 Main technical indicators of triangulation at various levels 4.1.5.1 The main technical indicators of triangulation networks at various levels shall comply with the provisions of Table 3. Table 3 Technical indicators of triangulated networks of various levels
Average side length
Mean error of angle measurement
Starting side length
Relative mean error
1/300000
1/200000 (first level)
1/120000 plus
1/120000 (first level)
1/80000)
1/60000 (first level)
1/45000 encryption)
1/20000
Weakest side length
Relative mean error
1/120000
1/80000
1/45000
1/20000
1/10000
The interior angle of a triangle should not be less than 30°. If there are difficulties, individual angles can be relaxed to 25°. 4. 1. 5. 2
4.1.6 Side measurement
4. 1. 6.1
The main technical indicators of the three-sided network of each level shall comply with the provisions of Table 4. Table 4 Technical indicators of the three-sided network of each level
Average side lengthbzxz.net
Relative mean error
1/300000
1/160000
1/120000
1/33000
1/17000
1/8000
Mean error in distance measurement
Level of distance measurement
Used
Instrument level
2 The internal angle of the triangle should not be less than 30°. When there are difficulties, individual angles can be relaxed to 25°. 4.1-6.2
4.1.7 Traverse measurement
4.1.7.1
The main technical indicators of distance measuring traverses of various levels shall comply with the provisions of Table 5. Number of horizontal angle observation rounds
Maximum
closure error of triangle (\)
Number of distance rounds
Average side length
Attached traverse
Length, km
Note: month is the number of turning angles of the traverse. GB/T 17986. 1-2000 Table 5 Technical indicators of each level of distance measuring wire Mean error of each side distance 4.17.2 The wire should be laid as a straight wire as far as possible, and form a mesh-shaped wire. The total length of the wire is relatively closed. 1/60c00 1/40c00 1/14600 1/10c00 1/6000 Number of rounds of horizontal angle measurement ±10Vn ±24 n
4.1.7.3 When the wire is laid out into a node network, the length of the attached wire between nodes and nodes, and between nodes and higher-level points, shall not exceed 0.7 times the attached wire length in Table 5.
4.1.7.4 When the attached wire length is shorter than 1/2 of the specified length, the closing error of the entire length of the wire can be relaxed to no more than 0.12m. 4.1.7.5 The number of distance measurement rounds and other regulations for each level of wire measurement shall be implemented in accordance with the corresponding level in Table 4. 4.1.8GPS static relative positioning measurement
The main technical requirements for GPS static relative positioning measurement at each level shall comply with the provisions of Tables 6 and 7. 4. 1.8. 1
Table 6 Average side length of instruments for GPS relative positioning measurement at each level
Satellite altitude angle
4. 1. 8. 2
4. 1. 8.3
GPS Receiver performance
Dual frequency (or single frequency)
Dual frequency (or single frequency)
Dual frequency (or single frequency)
Dual frequency (or single frequency)
Dual frequency (or single frequency)
Dual frequency or single frequency)
Measurement quantity
Cut wave cone position
Capsule wave phase
Cut wave phase
Cut wave phase
Carrier phase
Cut wave push position
Receiver nominal
Accuracy is better than
10 mm+2ppm
10 mm+3 ppm
10mm+3ppm
10 mm+3ppm
10 mm+3 ppm
Table 7 Technical indicators of GPS relative positioning measurement at each level Effective observation satellite
Any effective observation time of satellite in a period, min
Number of periods
Period length
Data acquisition interval
15～60
Number of synchronous observation and receiving machines
Point position and figure
Intensity factor
GPS network should be arranged in a triangular network or a wire network, or form a figure that can be checked by other independent verification conditions. The GPS network points should overlap with the high-level points of the original control network for at least 10 points. When the overlap is less than one, it should be measured jointly with the high-level points of the original control network. The total number of overlap points and joint measurement points shall not be less than three. 4.1.9 Utilization of existing control results GB/T 17986.1-2000
Before the control measurement, the existing control results and data in the survey area should be fully collected, and compared and analyzed according to the provisions and requirements of this specification. All existing excavation point results that meet the requirements of this specification should be fully utilized: For control points that do not meet the requirements of this specification, their points should be used as much as possible, and joint measurement should be carried out on related points.
4.2 Horizontal angle observation
4.2.1 Instruments for horizontal angle observation
DI, JJDJ are used for horizontal angle observation. Three grades of optical theodolites or electronic theodolites: their standard deviations in the horizontal direction of one measurement under outdoor test conditions shall not exceed ±1\, ±2\, and ±6” respectively. 4.2.2 Limits of horizontal angle observation
Horizontal angle observation generally adopts the direction observation method, and the various limits shall not exceed the provisions of Table 8. Table 8 Limits of horizontal angle observation
Metaphor model
4.3 Distance measurement
4.3.1 The role of photoelectric distance measurement
Half-measurement regression seasonal difference | |tt||2C mutual difference within a loop
The mutual difference of each measurement loop in one direction
The starting edge of each triangulation network, triangulation network or traverse network is mainly measured by photoelectric distance meter of corresponding accuracy. 4.3.2 Level of photoelectric distance meter
The accuracy level of photoelectric distance meter is divided into two levels according to the absolute value of the mean error m of 1km given by the manufacturer: Level 1:
Level I:
4.3.3 Limit error of photoelectric distance measurement
5 mm
（13）
.-(14)
GB/T17986.1—2000
TAXS30Yn
AY≤30n
AZ≤30n
Where: Wx, Wr, W2—-the closure error of each coordinate difference component; - the accuracy specified by the corresponding level (calculated according to the average side length), the inverse of the closed loop.
4.4.5 Adjustment calculation
II. III. The fourth-level and first, second and third-level plane control networks should be graded for unified adjustment or joint overall adjustment. After adjustment, accuracy assessment should be carried out.
4.4.6 Calculation of joint position
The digital position of adjustment calculation and data processing should comply with the provisions of Table 10. Table 10 Digital position of adjustment calculation and data processing Grade
Third and fourth-level
, third and third-level
5 Real estate survey
Horizontal gauge direction value and various correction numbers
5. 1 General Provisions
5.1.1 Contents of Real Estate Survey
Side length observations and
various corrections, m
length and coordinates
azimuth
Real estate survey is divided into house land survey and house survey, including the location, boundary, ownership, quantity and utilization status of each ownership unit, as well as the investigation of geographical names and administrative boundaries. 5.1.2 Real estate survey form
Real estate survey should use existing topographic maps, Cadastral maps, aerial photographs, and other relevant property registration materials shall be investigated item by item on the spot in units of hills and buildings according to the "Housing Adjustment List" and "Housing Land Survey List" specified in A1 and A2 of Appendix A. 5.2 Classification of real estate units
5.2.1 Survey and mapping unit of housing land Survey and mapping of housing land shall be conducted in units of hills and divided into households. 5.2.2 Survey and mapping unit of houses
Survey and mapping of houses shall be conducted in units of households. 5.3 Hills and hill numbers
5. 3. 1 Definition of hills
A hill refers to a bounded plot of land on the surface. When a plot belongs to only one property unit, it is called an independent hill; when a plot belongs to several property units, it is called a combined hill.
5.3-2 Division of hills
Where there are fixed boundary markers, they shall be divided according to the fixed boundary markers; where there are no fixed boundary markers, they shall be divided according to the natural boundaries. 5.3.3 Numbering of hills
5.3-3.1 The numbering of hills is based on the city, city district (county), property district, property subdivision, and the hill is numbered at five levels. GB/T 17986- 12000
5.3.3.2 The property district is based on the administrative transfer district of the street office or town (multiple townships) in the city administrative district, or the area divided by real estate management. According to actual conditions and needs, the property district can be divided into several property subdivisions. 5.3.3.3 The hill is divided based on the property subdivision. 5.3.3.4 Numbering method: The codes of cities and urban districts (counties) shall be the codes specified in GR/T 2260. Both property areas and property subdivisions are numbered in sequence from 01 to 99 with two natural numbers; when property subdivisions are not divided, the corresponding property subdivision number is represented by "01\. The numbering of a building is based on the property subdivision, and is numbered with 4 natural numbers from 0001 to 9999; new buildings are added in the order of the original numbers. The numbering format of a building is as follows:
City code + urban district (county) code + property area code + property subdivision code + building number (2 digits) (2 digits)
(2 digits)
Building numbers are numbered in reverse S-shaped order from north to south and from west to east. 5.4 Buildings and building numbers
5.4.1 Definition of a building
A building refers to an independent building, including buildings of different structures and Houses on the same level. 5.4.2 Building number compilation
(4 digits)
Building numbers are based on hills, starting from the entrance, from left to right, from front to back, and are numbered in an S-shaped sequence of 1.2. The idle sign is noted in the lower left corner of the house outline and is indicated by brackets. 5.4.3 Property ownership number
For houses built within the boundaries of other people’s land, a property ownership number should be added after the building number, and the property ownership number is indicated by identifier A. 5.4.4 House co-ownership number
For houses shared by multiple households, a co-ownership number is added after the building number, and the co-ownership number is indicated by identifier B. 5.5 House land survey
5.5.1 Contents of house land survey
The contents of house land survey include the location of the land, the nature of property rights, Basic information such as grade, taxes, land user, ownership nature of the land-using unit, source of use rights, boundaries, boundary markers, land use classification, land area and land disputes, as well as a rough map of the land use scope. 5.5.2 Location of housing land
The location of housing land refers to the name of the street where the housing land is located and the house number. When the housing land is located in a small lane, alley or alley, the name of the main street nearby should be noted; if the house number is missing, the house number of the adjacent house should be used and the east, south, west and north directions should be noted. When the housing land is located on more than two streets or has more than two house numbers, all of them should be indicated. 5.5.3 Property rights nature of housing land
The property rights nature of housing land should be filled in as state-owned or collective. If it is collectively owned, the land ownership unit should also be indicated. The full name of the land. 5.5.4 The grade of housing land
The grade of housing land shall be implemented in accordance with the land grade standards formulated by the local relevant departments. 5.5.5 Taxes and fees on housing land
Taxes and fees on housing land refer to the fees paid by the user of housing land to the relevant departments each year, based on the annual payment amount. 5.5.6 Owner of the right to use housing land
The owner of the right to use housing land refers to the name or unit name of the owner of the property rights of the housing land. 5.5.7 User of housing land
The user of housing land refers to the name or unit name of the user of housing land, 5.5.8 Source of land
The source of housing land refers to the time and method of obtaining the right to use the land: such as transfer, assignment, requisition, allocation, etc. 5.5.9 Boundaries of land
CB/T 17986. 1—2000
Boundaries of land refer to the situation of land boundaries and their neighbors. Generally, the adjacent hill numbers or street names are indicated in the east, south, west and north directions. 5.5.10 Boundary markers of land
Boundary markers of land refer to various signs on the land boundary, including natural boundaries such as roads and rivers; enclosures such as house walls, fences, and fences, as well as buried stone markers such as boundary markers and boundary stakes. 5.5.11 Classification of land use
Classification of land use shall be carried out in accordance with A3 in Appendix A. 5-5.12 Land use sketch
The land use sketch is a sketch drawn with land units as units, indicating the location of the house land, the relationship of the four boundaries, the land boundary, the boundary of the shared courtyard, and the category and ownership of the boundary markers. The length of the house land boundary shall also be noted. The boundary of housing land refers to the boundary of the housing land area. It includes the boundary of the courtyard, which is determined by the property owner (land user) and the neighboring households. If no evidence is provided or there is a dispute, the disputed area should be marked according to the actual use area and treated as undelimited. 5.6 Housing survey
5.6.1 Contents of housing survey
The content of housing survey includes the basic information such as the location of the house, the owner, the type of property, the level of the number of floors, the building structure, the year of construction, the purpose, the ownership of the wall, the source of rights, property rights disputes and other rights, as well as the drawing of a schematic diagram of the housing rights boundary. 5.6.2 Location of the house
The location of the house shall be investigated in accordance with the requirements of 5.5.2.
5.6.3 Owner of the house
5.6.3.1 For privately owned houses, the name on the property certificate shall generally be used. If the owner has died, the name of the agent shall be indicated; if the property is jointly owned, the names of all co-owners shall be indicated. 5.6.3.2 For houses owned by a unit, the full name of the unit shall be indicated. For houses owned by more than two units, the names of all the units in common shall be indicated. 5.6.3.3 Houses directly managed by the real estate management department include four types of property: public property, entrusted property, trustee property, and allocated property. Public property shall indicate the full name of the real estate management department. Entrusted property shall indicate the name of the trustee and the original owner. Trustee property shall indicate the name or unit name of the trustee and the entruster. Allocated property shall indicate the full name of the real estate management department and the name of the lending unit. 5.6.4 Type of house property
Type of house property refers to the classification based on different ownership of property rights. It is recorded in two levels, and its classification standard shall be implemented in accordance with A4 in Appendix A.
56.5 Source of house property rights
The source of house property rights refers to the time and method by which the owner obtains the house property rights, such as inheritance, analysis, purchase, gift, exchange, self-construction, reconstruction, requisition, acquisition, thank-you, price allocation, allocation, etc. If there are more than two sources of property rights, all of them should be indicated. 5.6.6 Total number of floors and the level of the building
5.6.6.1 The number of floors of a building refers to the natural number of floors of the building, which is generally calculated based on the indoor floor level of 0 or more; for semi-basements with skylights above the ground, if the interior height is above 2.20m, the natural number of floors is calculated. The total number of floors of the building is the sum of the number of floors above the ground and the number of floors underground: false floors, attached floors (mezzanines), inserted floors, attics (dark floors), decorative towers, and stairs protruding from the roof, and water tank rooms are not counted. 5.6.6.2 The level of the building refers to the first floor of the building of the unit of ownership in the building. The underground level is indicated by a negative number. 5.6.7 Building structure
The building structure of a building refers to the classification based on the building materials of the main load-bearing components such as beams, columns, walls, etc. of the building. The specific classification standard shall be implemented in accordance with A5 in Appendix A.
5.6.8 Year of building construction
Year of building construction refers to the actual year of completion of the building. For demolition and reconstruction, the year of completion of reconstruction shall prevail. If a building has more than two years of construction, they shall be noted separately. 5.6.9 Purpose of building
GB/T 17986. 1—2000
Purpose of building refers to the actual purpose of the building. The classification standard of buildings shall be implemented according to A6 in Appendix A. If a building has more than two purposes, they shall be investigated and noted separately. 5.6.10 Ownership of building walls
Ownership of building walls refers to the ownership of the four walls of the building, and three categories shall be noted separately: owned walls, shared walls and borrowed walls. 5.5.11 Additional explanation of building property rights
In the investigation, records shall be made for unclear or disputed property rights, as well as for other rights such as pawn rights and mortgage rights. 5.6-12 Schematic diagram of housing rights boundary
The schematic diagram of housing rights boundary is a rough map drawn with rights unit as the unit, showing the house and its related location, rights boundary, shared and common housing rights boundary, and the ownership of the wall connected to the neighboring household, and noting the length of the house side. The location of the disputed rights boundary should be marked. The housing rights boundary refers to the boundary of the housing ownership scope, including the rights boundary of shared and common housing, which is determined by the demarcation of the property owner and the certification of the neighboring household. The disputed rights boundary should be recorded accordingly. 5.7 Administrative boundary and geographical name survey
5.7.1 Administrative boundary survey
The administrative boundary survey should be conducted in accordance with the administrative boundary position stipulated by the people's governments at all levels, and the administrative divisions above the district, county and town should be surveyed and marked on the map. The administrative divisions of streets or townships can be adjusted and drawn as needed. 5.7.2 Geographical name survey
5.7.2.1 Geographical name survey (hereinafter referred to as place name survey) includes natural names such as settlements, roads, rivers, squares, etc. 5.7.2.2 The names of natural places should be based on the standard names announced by the place name management agencies of the local people's governments or the place names compiled by the public security organs. All place names and important scenic spots and historical sites within the survey area should be investigated. 5.7.3 Adjustment of administrative agency names
Administrative agency names are only investigated for administrative agencies above the town level. 5.7.4 Adjustment of the name of the enterprise or institution
The full name of the enterprise or institution that actually uses the house and its land should be investigated. 6 Property element measurement
6.1 Main contents of property element measurement
6. 1. 1 Boundary measurement
6.1.1.1 The numbering of boundary points is based on a whole kilometer grid of Gauss projection as a numbering area. The code of each numbering area is represented by the kilometer value of the horizontal and vertical coordinates of the southwest corner of the kilometer grid. The numbering of points is consecutively numbered from 199999 in a numbering area. The complete number of a point consists of three parts: the numbering area code, the point category code, and the point number. The numbering format is as follows: Numbering area code
(9 digits)
*******
Category code
(1 digit)
Point number
(5 digits)
The numbering area code consists of 9 digits. The first and second digits are the belt number or code of the Gaussian coordinate projection belt. The third digit is the hundred kilometers of the horizontal coordinate, the fourth and fifth digits are the thousand kilometers and hundred kilometers of the vertical coordinate, and the sixth, seventh, eighth, and ninth digits are the ten kilometers and whole kilometers of the horizontal and vertical coordinates respectively.
The category code is represented by a single digit, where: 3 represents a boundary point. The point number is represented by a five-digit number, which is consecutively numbered from 1 to 99999. 6.1.1.2 The boundary point measurement plate is measured from the adjacent basic control point or advanced boundary point, and is measured by field analytical methods such as polar coordinate method, branch line method or orthogonal method. It can also be measured simultaneously with other real estate projects during full field data collection. 61.1.3 When measuring the hill boundary line, when it is necessary to measure the side length of the hill boundary line, use a pre-inspected steel ruler to measure its length. The measurement accuracy of the hill boundary line should comply with the provisions of this specification. The length of the hill boundary line can also be calculated from the analytical coordinates of the adjacent boundary points. For irregular arc-shaped hill boundaries, they can be measured in sections according to the broken line. The measurement results should be marked on the hill division map. Provide the basis for calculating the hill surface identification and re-measurement inspection.
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