CAJ | 학술논문

成都市域的测绘系统采用独立的坐标系和高程系。而地下管线作为数字成都项目的一项基础地理信息，需要将其高程基准统一为1985国家高程基准。由于5·12汶川地震对成都平原的高程产生了一定的影响，因而在震后地下管线高程转换之前，应首先计算出汶川地震所引起的成都高程变化，并分析其对管线高程转换的影响。通过震后的二等水准网复测，并联测国家一等水准点，分析得出了地下管线高程转换方案。
성도시역적측회계통채용독립적좌표계화고정계。이지하관선작위수자성도항목적일항기출지리신식，수요장기고정기준통일위1985국가고정기준。유우5·12문천지진대성도평원적고정산생료일정적영향，인이재진후지하관선고정전환지전，응수선계산출문천지진소인기적성도고정변화，병분석기대관선고정전환적영향。통과진후적이등수준망복측，병련측국가일등수준점，분석득출료지하관선고정전환방안。
The surveying and mapping of Chengdu is based on the lonely coordinates and heights .As a basic geo-matics,the height of pipes underground is needed to transformed to 1985 national height datum .5· 12 Wenchuan disas-ter do influence Chengdu height ,so it’s to calculate the height deformation with the earthquake and analyz the influence on height transformation before this work .Through the second level survey after earthquake ,the pipe height transformation method is calculated .