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前言随着四化的需要,在建筑设计过程中或研究某些问题时,需要对某些已经建造建筑物的形状、大小作一概括的了解;从事于研究古代建筑者总是要对古建筑进行实测;或者外出参观一些好的建筑物、室内布置以及家俱没计,可拍摄一些照片反求出有关建筑物的正投影。这样可减少大量的测绘劳动力,节省经费的开支;尤其对测绘高度不方便、或危险地区不便测
Foreword With the needs of the four modernizations, in the process of architectural design or the study of certain problems, it is necessary to make a general understanding of the shapes and sizes of certain buildings that have been built; Conduct actual surveys; or go out and visit some good buildings, interior layouts, and furniture without counting. Take some photos to determine the orthographic projection of the buildings. In this way, a large number of surveying and mapping labor force can be reduced and expenditure on funds can be saved; in particular, it is inconvenient for surveying and mapping or inconvenient in hazardous areas.