assumed longitude

简明释义

选择经度

英英释义

例句

1.The navigator calculated the ship's position using the assumed longitude, which refers to the longitude that was estimated for the sake of navigation.

导航员计算船的位置时使用了假定经度，这是为了导航而估计的经度。

2.When calculating time zones, it is important to consider the assumed longitude of a location.

在计算时区时，考虑一个地点的假定经度是很重要的。

3.In the absence of accurate instruments, explorers often relied on assumed longitude to chart their course.

在缺乏准确仪器的情况下，探险者们常常依赖于假定经度来绘制他们的航线。

4.The map displayed the assumed longitude of the island, which was crucial for planning the expedition.

地图上显示了该岛的假定经度，这对策划探险至关重要。

5.The astronomer used the assumed longitude to determine the best time for observation.

天文学家使用假定经度来确定最佳观测时间。

作文

The concept of assumed longitude refers to the longitude that is taken as a reference point in navigation and mapping, especially when the exact position of an object is not known. This term is particularly important in maritime navigation, where sailors rely on accurate coordinates to ensure safe passage across the seas. Understanding assumed longitude helps navigators make informed decisions based on the information available to them. For instance, when plotting a course, a navigator may use an assumed longitude to estimate their position relative to known landmarks or other vessels. In many cases, the assumed longitude is determined based on previous data or calculations, which can sometimes lead to discrepancies if the initial assumptions are incorrect. This is why it is crucial for navigators to constantly update their knowledge of their actual position using tools such as GPS or celestial navigation. The reliance on an assumed longitude can lead to errors, especially in areas where the geographical features are complex or where there are few reliable reference points. Moreover, the implications of using an assumed longitude extend beyond just navigation; they also affect cartography and geographic information systems (GIS). In creating maps, cartographers often have to make assumptions about various geographical features, including their longitudes. If these assumptions are flawed, the resulting maps may misrepresent the reality of the landscape, leading to confusion for users. Therefore, understanding the concept of assumed longitude is vital not just for navigators but also for those involved in map-making and spatial analysis. In summary, assumed longitude plays a significant role in navigation and mapping, serving as a foundational element for determining positions and creating accurate representations of geographical areas. While it is a useful tool, it is essential to recognize its limitations and the potential for error that comes with it. As technology advances, the reliance on assumed longitude may decrease, but the understanding of its importance will remain relevant for anyone involved in navigation or cartography. By acknowledging the significance of assumed longitude and continuously striving for accuracy, we can enhance our ability to navigate the world around us effectively.

“假定经度”这个概念指的是在导航和制图中作为参考点的经度，尤其是在物体的确切位置未知时。这个术语在海上导航中特别重要，水手依靠准确的坐标确保安全航行。理解假定经度有助于导航员根据可用信息做出明智的决策。例如，在绘制航线时，导航员可能会使用假定经度来估算他们相对于已知地标或其他船只的位置。在许多情况下，假定经度是基于先前的数据或计算得出的，如果初始假设不正确，可能会导致差异。这就是为什么导航员必须不断更新他们对实际位置的了解，使用GPS或天文导航等工具的原因。依赖假定经度可能会导致错误，特别是在地理特征复杂或缺乏可靠参考点的区域。此外，使用假定经度的影响不仅限于导航；它们还影响制图和地理信息系统（GIS）。在创建地图时，制图师常常需要对各种地理特征，包括它们的经度，做出假设。如果这些假设存在缺陷，结果地图可能会错误地表示景观的现实，导致用户困惑。因此，理解假定经度的概念对于导航员以及参与制图和空间分析的人都至关重要。总之，假定经度在导航和制图中发挥着重要作用，是确定位置和创建地理区域准确表示的基础要素。虽然它是一个有用的工具，但必须认识到它的局限性及其可能带来的错误。随着技术的进步，对假定经度的依赖可能会减少，但理解其重要性对于任何参与导航或制图的人来说仍将保持相关性。通过承认假定经度的重要性并不断追求准确性，我们可以增强有效导航周围世界的能力。