ordnance datum

简明释义

法定基准线

英英释义

例句

1.The flood risk assessment was based on the local ordnance datum to determine potential water levels.

洪水风险评估是基于当地的基准高程来确定潜在水位。

2.It's important to convert local heights to the national ordnance datum for consistency in mapping.

将地方高度转换为国家基准高程对于制图的一致性很重要。

3.When planning the new building, the architect referred to the ordnance datum for proper height specifications.

在规划新建筑时，建筑师参考了基准高程以获得正确的高度规格。

4.The surveyor used the ordnance datum to ensure the elevation measurements were accurate.

测量员使用基准高程确保高度测量的准确性。

5.Engineers often use the ordnance datum to align infrastructure projects with existing geographical data.

工程师通常使用基准高程将基础设施项目与现有地理数据对齐。

作文

In the field of surveying and mapping, precise measurements are essential for creating accurate representations of the Earth's surface. One fundamental concept that professionals in this domain must understand is the term ordnance datum, which refers to a reference point or level used as a baseline for measuring elevations and depths. The ordnance datum provides a standardized framework that ensures all measurements are consistent and comparable across different regions and projects. Without such a reference, it would be challenging to communicate about heights and depths effectively, leading to potential errors in construction, navigation, and various engineering projects.The ordnance datum is particularly significant in countries where topographical maps are produced for public use. For instance, in the United Kingdom, the Ordnance Survey uses the ordnance datum known as the 'Newlyn Datum,' which is based on the mean sea level recorded at Newlyn in Cornwall. This datum serves as a crucial reference for all elevation data on maps and is vital for activities ranging from urban planning to environmental monitoring.Understanding the ordnance datum is not just important for surveyors; it also plays a critical role in various fields such as civil engineering, hydrology, and even in disaster management. For example, when designing infrastructure like bridges or roads, engineers must consider how their designs relate to the ordnance datum to ensure that they are safe and functional. Similarly, in flood risk assessments, understanding the elevation of land relative to the ordnance datum is crucial for predicting potential flood zones and developing effective mitigation strategies.Moreover, the concept of ordnance datum extends beyond terrestrial applications. In marine environments, similar reference points are established to measure depths accurately. Nautical charts often utilize a specific ordnance datum to indicate water depths, which are essential for safe navigation and anchoring of vessels. Mariners rely on these measurements to avoid underwater hazards and ensure safe passage through varying water conditions.As technology advances, the methods by which we determine and utilize the ordnance datum have also evolved. The introduction of Global Navigation Satellite Systems (GNSS) has enhanced the precision of elevation measurements, allowing for more accurate determinations of heights relative to the ordnance datum. This technological advancement has made it easier for professionals to collect and analyze data, leading to better-informed decisions in various sectors.In conclusion, the term ordnance datum is a cornerstone in the fields of surveying, engineering, and environmental science. Its importance cannot be overstated, as it provides a reliable reference for measuring and communicating about elevations and depths. As we continue to develop and refine our understanding of geographic data, the ordnance datum will remain an essential element in ensuring accuracy and consistency in our interactions with the physical world. Whether it is for urban development, environmental management, or navigation, grasping the concept of ordnance datum is crucial for professionals across multiple disciplines, ultimately contributing to safer and more efficient practices in our society.

在测量和制图领域，精确的测量对于创建地球表面的准确表示至关重要。专业人员必须理解的一个基本概念是术语基准面，它指的是用于测量高程和深度的参考点或水平。基准面提供了一个标准化的框架，确保所有测量在不同地区和项目之间是一致且可比较的。如果没有这样的参考，将很难有效沟通高度和深度，可能导致建筑、导航和各种工程项目中的错误。基准面在为公众使用而制作的地形图的国家中尤为重要。例如，在英国，陆军测量局使用被称为“纽林基准”的基准面，该基准基于在康沃尔纽林记录的平均海平面。这个基准是所有地图上高程数据的关键参考，对于城市规划和环境监测等活动至关重要。理解基准面不仅对测量师重要，它在土木工程、水文学甚至灾害管理等多个领域也发挥着关键作用。例如，在设计桥梁或道路等基础设施时，工程师必须考虑他们的设计与基准面的关系，以确保其安全和功能性。同样，在洪水风险评估中，了解土地相对于基准面的高程对于预测潜在洪水区并制定有效的缓解策略至关重要。此外，基准面的概念超越了陆地应用。在海洋环境中，类似的参考点被建立以准确测量深度。航海图通常利用特定的基准面来指示水深，这对于安全航行和船只锚泊至关重要。海员依赖这些测量来避免水下危险，确保在变化的水域条件下安全通过。随着技术的进步，我们确定和利用基准面的方法也在不断发展。全球导航卫星系统（GNSS）的引入提高了高程测量的精确度，使得相对于基准面的高度确定更加准确。这一技术进步使专业人士更容易收集和分析数据，从而在各个行业做出更明智的决策。总之，术语基准面是测量、工程和环境科学领域的基石。它的重要性不容小觑，因为它为测量和交流高程和深度提供了可靠的参考。随着我们继续发展和完善对地理数据的理解，基准面将始终是确保我们与物理世界互动时准确性和一致性的基本要素。无论是用于城市发展、环境管理还是导航，掌握基准面的概念对于各个学科的专业人士来说都是至关重要的，最终有助于我们社会中更安全和更高效的实践。