GB 22021-2008 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 22021-2008: Basic specifications for national geodesy Status: Valid
Basic dataStandard ID: GB 22021-2008 (GB22021-2008)Description (Translated English): Basic specifications for national geodesy Sector / Industry: National Standard Classification of Chinese Standard: A76 Classification of International Standard: 07.040 Word Count Estimation: 12,129 Date of Issue: 2008-06-20 Date of Implementation: 2008-12-01 Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This Chinese standard specifies the establishment and maintenance of geodetic control network, elevation control network and gravity control network, determine geoid basic technical indicators and technical requirements in order to achieve national land and sea unified geodetic datum, elevation benchmarks and benchmark their corresponding depth, gravity benchmarks. This standard applies to the territory of the PRC and engaged in other sea areas under the jurisdiction of geodetic activities. GB 22021-2008: Basic specifications for national geodesy---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Basic specifications for national geodesy ICS 07.040 A76 National Standards of People's Republic of China National Geodetic Survey basic technical requirements Posted 2008-06-20 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Table of ContentsPreface Ⅰ Introduction Ⅱ 1 Scope 1 2 Terms and definitions 1 3 1 General Provisions 4 Geodetic Datum and Geodetic Network 2 4.1 Geodetic Datum 2 4.2 Geodetic Network 2 5 Height Datum and Elevation Control Network 3 5.1 Height Datum 3 5.2 Vertical Control Network 3 5.3 Quasi-geoid 4 6 gravity base and gravimetric control network 4 6.1 gravity base 4 6.2 Gravity survey control network 4 6.3 Encryption gravimetry 5 7 depth reference 5 Appendix A (normative) 2000 National Geodetic coordinate system definition and the reference ellipsoid constant 6 Appendix B (normative) 1985 National Height Datum definitions and parameters 7ForewordAll the technical contents of this standard is mandatory. This standard was proposed by the State Bureau of Surveying and Mapping. This standard by the National Standardization Technical Committee on Geographical Information. The Standard Annexes A and B are normative appendix. This standard was drafted. Standardization Institute of the National Mapping Bureau of Surveying and Mapping, National Geomatics Center of China, the national mapping agency of the first geodetic The amount of the team, Chinese Academy of Surveying and Mapping. The main drafters of this standard. Shaw school year, Zhang Lei Yue Jianli, Zhang Yanping, Zhang Chuan silver.IntroductionIn order to meet national economic construction, national defense construction and social development needs, and to strengthen our geodetic work, standardize the behavior of Geodesy, According to "People's Republic of China Surveying and Mapping Law" to develop this standard. This standard is called the geodetic means to determine the location for the establishment and maintenance of Surveying and mapping system benchmarks carried out, the shape of the Earth, gravity Its field changes with time and space surveying and mapping activities. Its task is to establish and maintain geodetic datum, vertical datum, the depth and gravity-based reference Quasi; determining a refinement similar geoid and gravity field model. This standard defined the basic technical requirements of geodesy is to formulate and revise relevant geodetic specific technical standards by major according to. For the establishment and maintenance of specific technical methods and technical requirements of geodetic control network, elevation and gravity control network control network, the system will separate Given appropriate technical standards to guide and standardize the measurements. National Geodetic Survey basic technical requirements1 ScopeThis standard provides for the establishment and maintenance of geodetic control network, elevation and gravity control network control network, determine the basic techniques like finger geoid Standard and technical requirements to achieve the national land and sea unified geodetic datum, vertical datum and its corresponding depth reference, gravity base. This standard applies to geodesy activities in the area under the jurisdiction of the People's Republic of China and other sea areas engaged.2 Terms and definitionsThe following terms and definitions apply to this standard. 2.1 Of a coordinate system used to describe the position of any point on Earth, through geocentric, scale, axis point, the rotation speed of the Earth and the Senate Constant test ellipsoid (ellipsoid geometry and physical parameters) and other definitions. 2.2 Concrete realization of geodetic coordinate system that is fixed to the surface of the Earth by a particular set of markers and their measurements at the reference system Coordinates and other parameters reflect. 2.3 Consists of geodetic coordinate systems and geodetic coordinate frame. 2.4 Observation system consisting of a satellite positioning system receiver (including antenna), computer, meteorological equipment, communications equipment and power supply equipment, observation pier EC. It is a continuous long-term follow-up observations of the satellite signal, through a data communications network timing, in real time or on demand data center of the observed data To the data center. It can be stand-alone or network provides real-time, fast or subsequent data services. 2.5 For a variety of purposes related to regional science encrypt certain levels of gravity on the basis of the gravity point of control points on gravity measurements carried out.3 General3.1 In compliance with this standard premise, in geodetic measurements and the corresponding activity, operation process should be based on the state geodetic techniques Specifications and technical guidance document as a unified job basis. 3.2 using corners measurement, astronomical measurements, etc. for control measurements, technical requirements and operational procedure should be prescribed by the State Geodetic Survey Technical Specifications and technical guidance document as a unified job basis. 3.3 Geodesy using the error as the accuracy of technical indicators to 2 times the limit of error as error. 3.4 Geodetic instruments used should be subject to legal metrology qualified only after use. 3.5 Geodetic control points should be embedded in a fixed mark stone or logo, its structure and method of laying should be stable and suitable for the permanent preservation in principle.4 and geodetic datum geodetic control network4.1 Geodetic Datum 4.1.1 geodetic datum from the Geodetic Coordinate systems and geodetic framework. National geocentric coordinate system as a unified national land coordinate system. Geodetic coordinate frame by a geodetic coordinate system to achieve the geodetic control network embodied. 4.1.2 countries have adopted the 2000 national earth coordinate system, which is defined and constant reference ellipsoid in Appendix A. Transitional period, may be 1954 1980 Beijing Xi'an coordinate system and coordinate system. 4.1.3 geodetic control point coordinates should geodetic (earth longitude B, L geodetic latitude and geodetic height H) or spatial Cartesian coordinates (X, Y, Z) represents. 4.2 geodetic control network 4.2.1 General provisions 4.2.1.1 geodetic control network in accordance with the precision and purpose into one, two, three, four and so on geodetic control network. 4.2.1.2 geodetic control network can be laid across the stage to ensure accuracy, density and other technical requirements. 4.2.1.3 before the results of astronomical geodetic network was officially abolished, to ensure the accuracy of the premise, you can continue to use as needed. 4.2.1.4 land difficult areas away from the mainland and the island (reef) the geodetic control network fabric testing, because when you really can not meet the conditions specified in this standard, Approved by the provincial administrative departments of surveying and mapping. The technical specifications may be relaxed in accordance with the actual situation. 4.2.2 geodetic control network 4.2.2.1 First National geodetic control network 4.2.2.1.1 First National geodetic control network by the continuous operation of GPS reference station configuration, it is the backbone and the main branch of the National Geodetic Reference Support to achieve and maintain our three-dimensional, dynamic geocentric coordinate system, geodetic control network to ensure that the three-dimensional geocentric position coordinates accuracy and current trend. 4.2.2.1.2 National First GPS geodetic control network of Continuously Operating Reference Station geocentric coordinates of each component in the average error should be no greater than ± 0.5mm, relative accuracy should not be less than 1 × 10-8, the rate of change in the level of error in the coordinates of the direction should be less than ± 2mm, the vertical direction should not Greater than ± 3mm. 4.2.2.1.3 First National geodetic control network should be evenly distributed, covering our land. In meeting the conditions, it should be laid in the country First junction close to leveling line and the national first-class level networks. 4.2.2.1.4 local departments to establish a satellite positioning or continuous operation reference station, in line with the national unity and the establishment of technical standards required by this standard Technical indicators, after certification may be incorporated in the National First geodetic control network. 4.2.2.2 Second national geodetic control network 4.2.2.2.1 Second National Geodetic Network Design purpose is to achieve a large-scale monitoring of national stability, the second level of the network; combining fine Dense leveling, gravimetric and other technologies, like the refinement of geoid; for the third and fourth geodetic control network and the establishment of local geodetic control network Providing initial data. 4.2.2.2.2 national second geodetic control network between adjacent dots in the horizontal component of the baseline error should not exceed ± 5mm, the vertical component of the error The difference should be less than ± 10mm; relative accuracy of the control points should not be less than 1 × 10-7, the average distance between its point should not exceed 50km. 4.2.2.2.3 national second geodetic control network should be laid on a uniform basis, considering the applications and services on a national, second level Large-scale monitoring network stability factors. 4.2.2.2.4 national second geodetic control network retest period of 5 years, with each retest execution time should not exceed 2 years. 4.2.2.3 Third geodetic control network 4.2.2.3.1 Third Geodetic Network Design aim is to establish and maintain a provincial (or regional) geodetic control network, to meet the national basic scale test FIG basic needs. Combined leveling, gravimetry technique, refined provincial (or regional) like geoid. 4.2.2.3.2 Third error of geodetic control network between adjacent dots in the horizontal component of the baseline error should not exceed ± 10mm, the vertical component should be Not more than ± 20mm; relative accuracy of the control points should not be less than 1 × 10-6, the average distance between its point should not exceed 20km. 4.2.2.3.3 Third geodetic control network is routed should the provincial basic surveying services, state of the art, like the application level and geoid Surface finishing and so consistent with the objectives and should be laid as far as possible on the third and fourth level line. 4.2.2.3.4 Third geodetic control network should retest or updated as necessary. 4.2.2.4 fourth order geodetic control network 4.2.2.4.1 fourth order geodetic control network is the third-geodetic control network encryption. The error 4.2.2.4.2 fourth-geodetic control network between adjacent dots in the horizontal component of the baseline error should not exceed ± 20mm, the vertical component should be Not more than ± 40mm; relative accuracy of the control points should not be less than 1 × 10-5, the average distance between its point should not exceed 5km. 4.2.2.4.3 fourth order geodetic control network should retest or updated as necessary.5 Height Datum and Elevation Control Network5.1 Height Datum National height system uses high-normal system. Countries have adopted the 1985 National Height Datum Yellow Sea mean sea level is defined as a national system A starting elevation surface. National Height Datum elevation control network and by the quasi-geoid embodied. The definition of National Height Datum 1985 And parameters in Appendix B. 5.2 Vertical Control Network 5.2.1 General provisions 5.2.1.1 leveling accuracy divided in accordance with one, two, three, four and so on. Vertical Control Network mainly laid leveling mode, press cascade control The principle of the system is divided into one, two, three, four, etc. leveling network. Point in the standard point distance of 4km ~ 8km, in difficult access areas can be appropriately approved When relaxed. 5.2.1.2 far from the mainland island (reef) and transfer of National Height Datum elevation control network layout, indeed due to conditions not meet this standard gauge Timing, its technical indicators approved may be relaxed. 5.2.2 First National leveling network 5.2.2.1 First National leveling network is the National Height Control Network backbone, its main purpose is to achieve high-precision transfer of National Height Datum. 5.2.2.2 National First level network layout should take full account of tectonic setting, select the most appropriate route. National First level course should It is closed in a ring, and forming a network. Circumference of the loop in the eastern part of our country should not exceed 1600km, the western region is not more than 2000km. 5.2.2.3 National First Order Leveling per kilometer round trip with occasional discrepancies measured value calculated in error should not be greater than ± 0.45mm, with closed loop Per kilometer in full co-difference calculation error should not exceed ± 1.0mm. 5.2.2.4 First National Leveling Network retest every 15 years, each retest execution time not exceeding five years. 5.2.3 Second national leveling network 5.2.3.1 Second National Leveling Network is a national network of first-class level of encryption, laid into the ring with a combined route or in the national first-class leveling network. National second level of the loop perimeter, in the plains and hilly areas should not exceed 750km, mountainous and difficult areas approved may be relaxed. 5.2.3.2 National Class Leveling per kilometer round trip with occasional discrepancies measured value calculated in error should not be greater than ± 1.0mm, with closed loop Per kilometer in full co-difference calculation error should not exceed ± 2.0mm. 5.2.3.3 Second National Leveling Network should retest as needed, retest period no longer than 20 years. 5.2.4 Third and fourth order leveling network 5.2.4.1 Third and Fourth National leveling network is further encrypted, second level network. Third level course in general should form a ring, or closed In between grade level course. Fourth-grade level course should be close to leveling line occasionally formed branch. 5.2.4.2 Three, four and so accidentally per kilometer leveling reciprocating measured value does not match the computed error should not be greater than ± 3.0mm respectively and ± 5.0mm, per kilometer-wide ring closure with the difference calculation error should be no greater than ± 6.0mm respectively and ± 10.0mm. 5.2.4.3 three, four, etc. leveling cloth should be measured according to need, retest or updated. 5.3 Quasi-geoid 5.3.1 General provisions 5.3.1.1 Under the conditions meet the application requirements, like geoid model and satellite positioning technology, as determined elevation a method. 5.3.1.2 Quasi-geoid grid with certain resolutions average height anomaly to represent its accuracy and resolution by the grid average elevation differences Often the region with respect to each of the abnormal elevation control points of error and their average height anomaly grid interconnection from FIG. 5.3.1.3 Methods of measurement outside the industry like geoid should adopt appropriate precision inspected by nuclear and assessment. 5.3.1.4 Quasi-geoid by our range, precision and purpose, divided into countries like the geoid, quasi - geoid and provincial Cities like geoid. 5.3.2 National Quasi-geoid 5.3.2.1 countries like geoid resolution should not be less than 15 '× 15', its accuracy. plains, hills should not be less than ± 0.3m, mountains And the mountains shall be not less than ± 0.6m. 5.3.2.2 countries like abnormal height control point geoid, its coordinates and elevation accuracy should not be less than the national geodetic control network and the second National second level outlets accuracy. 5.3.3 provincial quasi - geoid 5.3.3.1 provincial quasi-geoid resolution should not be less than 5 '× 5', its accuracy. plains, hills should not be less than ± 0.1m, mountains, Alpine land shall not be less than ± 0.3m. 5.3.3.2 provincial seems abnormal height adjacent control point geoid, its height anomaly poor accuracy no less than in the plains, hills ± 0.1m, in the mountains, mountain not less than ± 0.3m. 5.3.4 Urban Quasi-geoid 5.3.4.1 city like geoid resolution should not be less than 2.5 '× 2.5', its accuracy should not be less than ± 0.05m. 5.3.4.2 neighboring cities like abnormal height control point geoid, its height anomaly difference accuracy not less than ± 0.05m.6 gravity base and gravimetric control network6.1 gravity base 6.1.1 National gravity reference reflected by the 2000 national gravity base net. 6.1.2 various encryption gravity measurements are made with the national gravity reference point of gravity gravity gravity value for joint measurement of the measuring point. 6.2 Gravity survey control network Objective 6.2.1 National gravimetric control network is to establish and maintain a national gravity base, to provide a unified gravity for all types of gravity measurement starting value. Follow the principle of gradual control layout is divided into gravity base net, first-class and second-class gravity gravity network points. 6.2.2 gravity base net by a gravity reference point, and its basic points lead dots, and includes a certain number of lattice gravimeter calibration baseline. its Density should be effectively covered the national territory, in order to meet the needs of first-gravity control point opposite joint measurement accuracy requirements and the national economy and national defense construction. Absolute gravity measurement reference point value in error should not be greater than ± 5 × 10-8m · s-2. Between gravity and the basic reference point and point-point lead into the Line relative gravity measurements, the relative gravity measurements Measuring the difference in gravity segment error should not be greater than ± 10 × 10-8m · s-2. 6.2.3 First gravity network is gravity base net expansion of a closed loop should be laid. First point difference segments gravity gravity gravity substantially outlets The joint measurement error should not be greater than ± 25 × 10-8m · s-2. 6.2.4 The second point is the number of gravity gravity network encryption. Second gravity point encryption according to different regions at different times of the actual gravity measurements required To be laid, in their joint measurement error should not be greater than ± 250 × 10-8m · s-2. 6.2.5 gravimeter calibration baseline grid value is used to establish national benchmarks relative gravity measurement scales, including short and long baseline baseline. Long baseline along South North to the layout, the difference between both ends of the baseline value of gravity should be greater than 2000 × 10-5 m · s-2, each baseline point of gravity should be the reference point; be short baseline By region layout, poor short baseline values at both ends of the point of gravity should be greater than 150 × 10-5m · s-2, para gravity difference relative error should be less than 5 × 10-5. 6.2.6 gravity base net should retest every 15 ye......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 22021-2008_English be delivered?Answer: Upon your order, we will start to translate GB 22021-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 22021-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB 22021-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. |
