三角高程测量高差值应进行球差改正。
Elevation difference by trigonometric leveling shall be corrected by spherical aberration.
对提高山区三角高程测量的精度有一定的实用价值。
It has a definite value for raising the accuracy of triangulation in mountain area.
采用对向测距三角高程联合二等水准进行标志的高程测量。
Subtending distance measurement trigonometric leveling uniting second-class leveling is adopted to measure height.
大气垂直折光是影响EDM三角高程测量精度的制约因素之一。
Atmospheric vertical refraction is the main factor which affects the precision of EDM trigonometric levelling.
传统的测量方法为水准测量和三角高程测量，它们都存在着不同的优缺点。
The traditional methods are geometrical leveling and trigonometric leveling. They have different advantage and disadvantage.
在光电测距三角高程测量中，大气折光对观测量的影响是一个非常棘手的问题。
The effect of atmospheric refraction error on observed value is a very thorny problem in EDM trigonometric leveling.
简述了全站仪不测量仪器高和棱镜高在三角高程测量中的工作原理以及实际应用状况。
The working principle and practical application of total-station meter in triangle height survey(without measuring height of meter and its prism)are introduced.
采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values.
分析了单向光电三角高程测量的误差来源，在此基础上推导了最佳测站位置离测点的平距公式。
Based on the error resource analysis in one-way photoelectric triangulated heigh survey, the horizontal distance equation is drawn for optimal station away from survey point.
介绍一种对红外观测边长及三角高程在观测面上的概算编程方法，说明了程序的设计过程和使用方法。
The paper presents a rough estimate method in observation of infrared measuring of side length and infrared trigonometric levelling. It states the designing process of programs and how to use them.
把全站仪三角高程的测量原理运用到城市管道工程的建设中，可以代替传统的用几何水准测量高程的方法。
Applying the measuring principle of the trigonometric leveling with total station into the construction of urban pipeline engineering can replace the traditional geometric leveling method.
实践证明，EDM三角高程观测方法简单、传递高程迅速、受地形条件限制小、精度较高，有广泛的适应性。
Practice shows that EDM triangle elevation observation method is very simple, highly efficient in transmitting of elevation, less influenced by limitation of terrain, accurate and widely suitable.
由此总结出在云南高原地区进行红外仪三角高程代替三、四水准，所产生误差的规律性，并制定一套较实用的操作规程。
The regularity of error and practical instructions are summarized for using infrared range-measurement system instead of the third of fourth grade levelling on Yunnan Plateau.
在悬空管线测量中，对于管径大、悬空高的管线，用普通三角高程法测量很难满足精度要求，而用切线法测量则很容易达到精度要求。
When surveying major diameter and higher hanging pipeline, common trigonometric leveling can't meet precision requirement, but tangent method surveying can meet precision requirement.
由离散高程点建立的三角网d TM，能够在多方面应用。如生成等高线、建立地面模型、计算土方量等。
Triangle network DTM building with concrete height points can be used for various aspects, e. g. generating contours, building surface model and calculating earthwork, etc.
在基于等高线建立的数字高程模型TIN中，由平坦三角形连接成的平坦区域不能真实地反映地表的真实形状，需要进行适当地修正。
IN TIN of digital elevation model constructed from contours, flat areas which are made up of flat triangles can not reflect the real shape of the surface, so that they need be corrected properly.
从数据的采集，到三角网的构建，以及拓扑结构的形成，最后得到网格单元，准确的把煤炭地质高程显现出来。
From the data collection, to the triangle network topology construction, and the formation of grid unit, finally obtained the coal geology, accurate elevation revealed.
通过黄河三角洲前沿陆地高程的变化和验潮获得的资料，介绍了黄河三角洲前沿深度基准面的变化和潮位变化情况。
In this paper, the observed land surface height data and tidal data in the Yellow River delta foreland area are used to describe the variations in depth datum and tidal level in the area.
它先产生一个包含插值点在内的内插三角形，然后利用此三角形来内插插值点高程；
The elevation of the point can be interpolated by means of the triangle first.
设计方案中对已有的数字高程模型进行加密内插，使用三角化方法来计算地表曲面面积，采用参考平面法实现区域通视分析。
Then triangulation is used for the calculation of a polygon's surface area, and viewshed analysis is carried out using the method of reference plane.
设计方案中对已有的数字高程模型进行加密内插，使用三角化方法来计算地表曲面面积，采用参考平面法实现区域通视分析。
Then triangulation is used for the calculation of a polygon's surface area, and viewshed analysis is carried out using the method of reference plane.
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