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相关概念视频

Plotting of Topographic Maps01:29

Plotting of Topographic Maps

47
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,...
47
Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

27
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
27
Levels of Use of a GIS01:29

Levels of Use of a GIS

52
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...
52
GIS Software, Hardware, and Sources of GIS Data01:23

GIS Software, Hardware, and Sources of GIS Data

60
A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
60
Manipulation and Analysis01:21

Manipulation and Analysis

25
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
25
Methods of Obtaining Topography01:25

Methods of Obtaining Topography

66
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,...
66

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相关实验视频

Updated: Jul 3, 2025

High-speed Particle Image Velocimetry Near Surfaces
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历史地图的自动矢量化:一个基准.

Yizi Chen1,2,3, Joseph Chazalon1, Edwin Carlinet1

  • 1EPITA Research Lab. (LRE), Kremlin-Bicêtre, France.

PloS one
|February 15, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了数字化历史地图的改进管道,提高了形状矢量化准确性和完整性,用于详细的城市分析. 这项研究对深度学习方法进行了基准测试,以从历史图谱中可靠地提取特征.

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科学领域:

  • 计算机视觉 计算机视觉
  • 数字人文学科 数字人文学科
  • 地理信息系统 (GIS) 是指地理信息系统.

背景情况:

  • 历史地图的数字化对城市研究至关重要,但现有的形状矢量化方法面临准确性挑战.
  • 数字化19世纪和20世纪初的巴黎地图集需要强大的技术来提取复杂的地理细节,如建筑物和街道.

研究的目的:

  • 综合评估和改进监督管道,以便对历史地图进行准确和完整的形状矢量化.
  • 确定历史地图数字化和特征提取最有效的方法选择.

主要方法:

  • 开发了一个监督管道,结合了深边过和分水转换,用于封闭形状提取.
  • 提出了改进的训练协议和对边缘检测和形状提取阶段的联合优化.
  • 与最先进的深边过器 (包括视觉变压器) 进行了比较,并对传统方法进行了深度可学习分水的评估.

主要成果:

  • 建立了历史地图矢量化的基准,使数据,代码和结果公开可用.
  • 证明了用于增强矢量化性能的联合优化方法的有效性.
  • 确定了关键路径,以完全自动地提取关键的历史地图元素.

结论:

  • 拟议的管道和优化方法显著提高了历史地图矢量化的准确性和完整性.
  • 这项工作为数字人文和地理信息系统的研究人员提供了宝贵的资源,使新的历史分析成为可能.
  • 资源的开放可用性促进了在历史地图学和城市形态学研究中进一步的研究和应用.