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相关概念视频

Methods of Obtaining Topography01:25

Methods of Obtaining Topography

51
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
51
Topographic Surveying and Contours01:29

Topographic Surveying and Contours

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Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
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Plotting of Topographic Maps01:29

Plotting of Topographic Maps

39
Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
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Coordinates and Map Projections01:29

Coordinates and Map Projections

31
Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
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Centroid for the Paraboloid of Revolution01:16

Centroid for the Paraboloid of Revolution

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The paraboloid of revolution is an axially symmetric surface generated by rotating a parabola around its axis. This shape has several applications in mechanical engineering due to its advantageous structural properties, such as strength against stress concentration points and rotational symmetry.
The centroid for the paraboloid of revolution is the point where all the mass of the paraboloid is concentrated. This centroid is important for engineering applications, as it determines how forces are...
526
Levels of Use of a GIS01:29

Levels of Use of a GIS

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Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
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相关实验视频

Updated: Jun 3, 2025

A Method for 3D Reconstruction and Virtual Reality Analysis of Glial and Neuronal Cells
12:49

A Method for 3D Reconstruction and Virtual Reality Analysis of Glial and Neuronal Cells

Published on: September 28, 2019

12.7K

使用OpenStreetMap进行3D建筑的多面体重建的垂直导向方法.

Hanli Liu1, Carlos J Hellín1, Abdelhamid Tayebi1

  • 1Department of Computer Science, Universidad de Alcalá, 28805 Alcalá de Henares, Spain.

Sensors (Basel, Switzerland)
|January 8, 2025
PubMed
概括

本研究介绍了一种高效的几何算法,用于将各种屋顶形状添加到来自OpenStreetMap的3D建筑模型中. 该算法在简单的建筑足迹上表现良好,但对于复杂的建筑足迹需要进一步改进.

科学领域:

  • 计算机科学 计算机科学
  • 地理信息系统 地理信息系统
  • 计算几何学的计算几何学

背景情况:

  • 3D建筑模型对于城市规划和分析至关重要.
  • 从地理空间数据中重建复杂的屋顶结构存在重大挑战.
  • OpenStreetMap为3D建筑数据提供了一个有价值的来源.

研究的目的:

  • 开发和呈现一个数学定义和编程考虑一个高效的几何算法.
  • 为了使多面体3D建筑模型能够添加各种屋顶形状.
  • 为了解决屋顶形状缺乏明确的重建理论.

主要方法:

  • 为屋顶重建开发了一种高效的几何算法.
  • 使用度和经度坐标作为输入.
  • 通过过桥轮服务获得的地理空间数据.
  • 实现了多面体3D建筑模型的算法.

主要成果:

  • 该算法成功地重建了众多屋顶形状,包括斜顶,顶,金字塔式和顶.
  • 对于具有直线足迹的建筑物来说,证明了卓越的性能.
  • 对具有复杂足迹的建筑物确定了限制.
关键词:
3D城市建模 3D城市建模3D重建重建的3D重建开放街道地图是开放街道地图.

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结论:

  • 开发的算法有效地将屋顶添加到3D建筑模型中,特别是那些具有简单足迹的建筑模型.
  • 需要进一步的研究和改进,以克服复杂建筑足迹的局限性.
  • 这项工作有助于推进自动化3D城市建模的发展.