在煤基上自动生成一致的年度最大NDVI,采用新的算法
Jun Li1,2, Tingting Qin1, Chengye Zhang3,4
1College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing, 100083, Beijing, China.
Scientific data
|June 26, 2024
概括
一个新的算法,Auto-NDVIcb,准确地为中国的煤矿地区生成每年最大的NDVI. 这种公开可用的数据集监测植被变化,并有助于制定保护政策.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 地理空间分析是什么
背景情况:
- 煤炭开采影响全球能源安全,需要平衡资源开采与植被保护.
- 现有的年度最大NDVI数据存在局限性,包括低值,时间不一致性和马赛克线器件.
- 监测煤炭开采区的植被变化对于环境管理至关重要.
研究的目的:
- 开发一种自动化算法 (Auto-NDVIcb),用于为中国的煤炭基地生成准确的年度最大NDVI数据.
- 发布公开可访问的2013年至2022年中国煤炭基地年度最大NDVI数据集.
- 为持续监测煤炭开采影响的植被动态提供一个工具.
主要方法:
- 在谷歌地球引擎平台内开发了Auto-NDVIcb算法.
- 在14个煤基中使用根平均平方误差 (RMSE) 验证了算法的准确性.
- 创建并发布了14个中国煤炭基地 (2013-2022) 的年度最大NDVI数据集.
主要成果:
- 自动NDVIcb算法实现了0.087的平均RMSE,证明了高精度.
- 已经创建并发布了针对中国煤炭基地 (2013-2022) 的综合性年度最大NDVI数据集.
- 数据集旨在快速,自动在线更新,确保当前的监控能力.
结论:
- 自动NDVIcb算法提供了一种可靠的方法来评估煤矿地区的植被状况.
- 公开发布的数据集支持持续监测植被变化和退化机制.
- 这些数据对于在中国的煤矿区制定有效的植被保护政策至关重要.
相关概念视频
01:21Isochoric and Isobaric Processes
A thermodynamic process that occurs at constant volume is called an isochoric process. According to the first law of thermodynamics, heat supplied or removed from the system is partially utilized to perform work and change the internal energy of the system. However, in an isochoric process, the volume remains constant. Hence, the work done by the system is zero. Therefore, the exchange of heat changes the internal energy of the system only.
Suppose 1000 g of water is heated from 40 degrees...
Suppose 1000 g of water is heated from 40 degrees...
01:20Maxwell-Boltzmann Distribution: Problem Solving
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
01:25Distribution Reliability and Automation
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
01:24Area Computation by the Alternative Coordinate Method
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...
01:25Methods of Obtaining Topography
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,...
01:25Maximizing the Directional Derivative
The directional derivative is a central concept in multivariable calculus that describes how a function changes at a given point when moving in a specified direction. This direction is represented by a unit vector, ensuring that only the orientation influences the rate of change. By varying the direction, different rates of change can be observed, demonstrating that the directional derivative depends strongly on the chosen direction.The directional derivative is computed using the gradient...