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Related Concept Videos

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Calculating areas within irregular boundaries, such as along rivers or curved roads, is crucial in various fields, including surveying, engineering, and environmental management. Surveyors often begin by creating a traverse, a connected series of straight lines approximating the area's boundary. The coordinates of each traverse point are essential for calculating the enclosed area. The double meridian distance formula is a widely used technique for this purpose. This method utilizes the...
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The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
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Determining the area of a region with straight edges is straightforward, as geometric formulas for rectangles, triangles, and polygons can be applied directly. However, traditional geometric methods are insufficient when a region has a curved boundary, such as the area under a function.fromThe area problem involves finding a systematic way to measure such regions. One approach to solving this problem is through approximation. Instead of attempting to compute the area exactly at the outset, the...
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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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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...
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Related Experiment Video

Updated: Jan 18, 2026

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Efficient Navigable Area Computation for Underground Autonomous Vehicles via Ground Feature and Boundary Processing.

Miao Yu1, Yibo Du2, Xi Zhang1

  • 1School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China.

Sensors (Basel, Switzerland)
|September 13, 2025
PubMed
Summary

This study presents a new method for autonomous vehicles in underground mines to detect tunnel boundaries accurately, even in poor visibility. The approach ensures safe navigation by processing ground features and completing boundaries in real-time.

Keywords:
3D point cloudautonomous drivingboundary detectiondirection extractionunderground mines

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Area of Science:

  • Robotics and Autonomous Systems
  • Geospatial Data Processing
  • Mining Engineering

Background:

  • Underground mining presents unique challenges for autonomous vehicles, including poor illumination, dust, and water mist that degrade sensor data.
  • Accurate detection of tunnel boundaries is crucial for preventing collisions and ensuring safe operation of trackless rubber-wheeled vehicles.

Purpose of the Study:

  • To develop a robust navigable area computation method for underground autonomous vehicles.
  • To address challenges in boundary detection caused by harsh environmental conditions and complex tunnel geometries.

Main Methods:

  • A real-time point cloud correction process aligns LiDAR data with the vehicle's coordinate system.
  • A grid-based projection method creates a 2D map from corrected point clouds, mitigating ground unevenness.
  • An adaptive boundary completion method handles discontinuities at junctions and shunting chambers, integrating temporal context for continuous detection.

Main Results:

  • The proposed method accurately detects and consistently tracks dual-sided tunnel boundaries in various underground environments (straight tunnels, curves, intersections, shunting chambers).
  • Experimental validation on real underground vehicle data confirms the method's effectiveness and reliability.
  • The system meets the stringent requirements for underground autonomous driving.

Conclusions:

  • This rule-based, real-time solution is feasible for resource-constrained environments, offering a vital safety fallback when deep learning methods are compromised.
  • The method provides critical safety redundancy for autonomous vehicles operating in challenging underground conditions.