The Application Of Satellite Positioning Technology In The Engineering Survey Aid Construction Of Zambia Highway

There has been "the world raw materials base" of the Africa, with rich resourcesof continental plates, the most important mineral of the global50kinds, Africa thereare at least17, and reserves ranking first in the world. African economies are highlycomplementary to each other, Africa countries want to accumulate funds through theexploitation of resources, to promote their economic development. Africa also withour friendship from generation to generation, economic and cultural exchanges,Chinese economic development, will promote the friendship from generation togeneration Africa brothers, Chinese enterprises "going out" is the need to China itssustainable economic development, Chinese enterprises "going out" but also for otherdevelopment Chinese home real achievements in the development of. More and moreprojects in the Africa earth, then the measurement is the engineering developmentpioneer, let Africa countries share Chinese mapping technology, let Chinese moreadvanced geographic information platform technology in Africa development.Especially in recent years China "going out" policy carried out, more Chinese toAfrica earth, more of the project is in the earth Africa. With more and more tasks ofengineering surveying, it is necessary to be familiar with and master Africameasurement.This article discusses the measurement system Africa Zambia geodeticdatum, the reference ellipsoid, projection characteristics, using satellite positioningmeasurement of LArge sites have high precision and widely used in variousengineering.Along with the construction and development of GPS, GLONASS, AmericanRussia EU Galileo, China Beidou system, positioning accuracy of satellite has to meetthe needs of high precision measurement. This paper comes from the nonreconstruction, based on the Africa capital of Zambia municipal road reconstructionproject practice, engineering measurement through the beginning road reconstructionproject. In order to work smoothly, understand relevant parameters of Zambia nationalcoordinate system must first, collect the integration of the relevant national control data, and then made the efficiency from the reality of the operation plan of [1], inorder to ensure the engineering quality, and improve work efficiency. This paperdiscusses the measurement system Africa Zambia geodetic datum, the referenceellipsoid, projection characteristics, using satellite positioning measurement of largesites have high precision and widely used in various engineering; starting from thepractice, put forward Africa engineering measurement should be on the analysismethod, coordinate system establishment, operation method, ephemeris the principle,control network, industry processing, precision analysis, using the method of RTK,handheld GPS parameter calculation and setting methods and measures; the elevationof domestication and Gauss conformal projection of the change of the distance, totalstation measuring length and GPS computing distance compared to verify theaccuracy of the use of the Africa engineering coordinate system, discusses thefeasibility of GPS Fitting Height for substandard leveling; satellite positioningtechnique in Africa control measure to reduce the labor intensity of field measurementof personnel, improve the work efficiency of the inside and outside the industry, andto obtain a higher precision results[1], so as to get the satellite positioning technologyto form of geometric network and avoid the bad time, provide the experience to carryout surveying and mapping work in Africa case.In this article, through the elevation ofdomestication and Gauss conformal projection of the change of the distance, totalstation measuring length and GPS computing distance compared to verify theaccuracy of the use of the Africa engineering coordinate system, discusses thefeasibility of GPS elevation fitting for substandard level elevation.Satellite positioning system has been very popular in domestic engineeringapplication, the State encourages to develop the international market. This theme fromChinese built on Africa road project, discusses the experience with satellitepositioning technology of Geodesy in Africa and coping methods, through thereconstruction project of Zambia Lusaka city road network practice, gained someexperience, do provide a case engineering experience for future Chinese to Africa.The main research contents and achievements of this paper are as follows:1, Overview of Zambia geographical location, climate, road network, analyzedthe measurement data collection and utilization of existing; 2, Analysis of the Africa geodetic datum, the reference ellipsoid, projection andother major features, by collecting various data, the coordinate system characteristicsof Zambia in Lusaka City, the southern hemisphere projection by ARC1950UTM,spherical, ellipsoid to use Clark1880, central meridians of longitude27°and otherimportant geodetic parameters;3, Starting from the practice, geodetic measuring instrument by using satellitepositioning, ephemeris to avoid unfavorable periods, the first control net to form ageometric shape, can obtain very high accuracy and satellite positioning technology,discusses the RTK cautions and armed with five parameter in GPS how to achieve inthe local. Then for municipal road reconstruction project will provide important basicdata, and can be widely used in various engineering projects Africa;4, The elevation of domestication and Gauss conformal projection of the changeof the distance, total station measuring length and GPS computing distance comparedto verify the accuracy of the Africa engineering coordinate system, reach the citymeasurement requirement of less than2.5Cm per km length deformation, guarantee toobtain high accuracy measurement;5, Discuss the feasibility of GPS elevation fitting for substandard level elevation,four level control points and fitting height contrast guiding the stability analysis, thefitting height, can reach the requirement of leveling etc.;6, the land use Chinese prospect of domestic advanced technology to carry outsurveying and mapping engineering prospect in the Africa, with the introduction ofChina Beidou, four-star GNSS positioning technology has become more Africaengineering use may be based on Africa, also has a geographic information mappingthe broad market.