altitude of back sight

简明释义

过天顶高度

英英释义

例句

1.The surveyor recorded the altitude of back sight to ensure accurate measurements.

测量员记录了后视高程以确保测量的准确性。

2.To calculate the final elevation, we need the altitude of back sight from the last point.

要计算最终的海拔，我们需要最后一个点的后视高程。

3.In leveling, the altitude of back sight is crucial for determining the height difference.

在水平测量中，后视高程对于确定高度差至关重要。

4.The engineer explained how the altitude of back sight affects the overall project accuracy.

工程师解释了后视高程如何影响整体项目的准确性。

5.During the training session, we practiced measuring the altitude of back sight accurately.

在培训课程中，我们练习了如何准确测量后视高程。

作文

In the field of surveying and geodesy, precise measurements are crucial for various applications, including construction, mapping, and land development. One important term that often arises in this context is the altitude of back sight, which refers to the height of a point that is being observed from a surveying instrument. Understanding this concept is essential for professionals in the field, as it directly impacts the accuracy of their measurements and the overall success of their projects.The altitude of back sight is determined when a surveyor uses a leveling instrument to establish a reference point. This process typically involves setting up the instrument on a stable tripod and ensuring it is perfectly leveled. Once the instrument is set up, the surveyor looks through the telescope to find a known benchmark or point of reference. By measuring the distance from the instrument to this point, they can accurately determine the altitude of back sight.This measurement is crucial because it serves as a baseline for other elevations that will be measured during the survey. For instance, if a surveyor is working on a construction site, they need to know the elevation of the ground to ensure that buildings and structures are built at the correct height. The altitude of back sight provides this necessary reference. If the altitude is not accurately recorded, it could lead to discrepancies in the final measurements, resulting in costly errors in construction.Moreover, the altitude of back sight is also important when establishing vertical control points. These points are used to create a network of elevations across a larger area, which is particularly useful in large-scale projects such as highways or bridges. By maintaining an accurate altitude of back sight, surveyors can ensure that all points in the network are consistent and reliable.In addition to its practical applications, understanding the altitude of back sight also enhances a surveyor's theoretical knowledge. It connects to broader concepts in geometry and trigonometry, where understanding angles and heights is fundamental. Surveyors must be able to visualize how different measurements relate to one another, and the altitude of back sight plays a key role in this visualization.To summarize, the altitude of back sight is a fundamental concept in surveying that refers to the height of a point observed from a surveying instrument. It is vital for ensuring accurate measurements and establishing reliable reference points in various projects. As professionals in the field continue to develop their skills and knowledge, mastering the concept of altitude of back sight will undoubtedly enhance their effectiveness and precision in their work. Whether it is for construction, mapping, or land development, understanding this term is essential for achieving successful outcomes in surveying endeavors.

在测量和大地测量领域，准确的测量对于各种应用至关重要，包括建筑、制图和土地开发。在这个背景下，常常出现一个重要术语，即后视高度，它指的是从测量仪器观察的点的高度。理解这一概念对于该领域的专业人士来说至关重要，因为它直接影响到测量的准确性以及项目的整体成功。后视高度是在测量员使用水平仪建立参考点时确定的。这个过程通常涉及将仪器设置在稳定的三脚架上，并确保其完全水平。一旦仪器设置好，测量员就通过望远镜找到一个已知的基准点或参考点。通过测量仪器与该点之间的距离，他们可以准确确定后视高度。这一测量至关重要，因为它作为将在测量过程中测量的其他高程的基线。例如，如果测量员在施工现场工作，他们需要知道地面的高程，以确保建筑物和结构以正确的高度建造。后视高度提供了这个必要的参考。如果高度没有准确记录，可能会导致最终测量中的差异，从而导致建筑中的昂贵错误。此外，后视高度在建立垂直控制点时也很重要。这些点用于在更大区域内创建高程网络，这在高速公路或桥梁等大规模项目中尤其有用。通过保持准确的后视高度，测量员可以确保网络中的所有点都是一致和可靠的。除了实际应用外，理解后视高度还增强了测量员的理论知识。它与几何和三角学中的更广泛概念相连接，其中理解角度和高度是基础。测量员必须能够想象不同测量之间的关系，而后视高度在这种可视化中发挥着关键作用。总之，后视高度是测量中的一个基本概念，指的是从测量仪器观察的点的高度。它对于确保准确的测量和在各种项目中建立可靠的参考点至关重要。随着该领域专业人士继续发展他们的技能和知识，掌握后视高度的概念无疑将增强他们在工作中的有效性和精确性。无论是用于建筑、制图还是土地开发，理解这个术语对于在测量工作中取得成功的结果是必不可少的。