相关实验视频
Updated: May 9, 2025

08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
5.9K
奥兰多 (2013-2021) 的两年次次计量树木覆盖率数据集 (2013-2021)
Danlu Cai1, Leiqiu Hu2, Janak Parajuli1
1Department of Atmospheric and Earth Science, University of Alabama in Huntsville, Huntsville, AL, 35899, USA.
Scientific data
|April 29, 2025
概括
这项研究绘制了2013-2021年奥兰多城市树冠变化的地图. 高分辨率地图有助于城市规划和环境可持续性的努力.
科学领域:
- 城市生态城市生态学
- 遥感 遥感 遥感 遥感
- 环境监测 环境监测
背景情况:
- 城市发展导致了大量的植被丧失,尤其是城市树木.
- 城市认识到树冠覆盖对环境挑战的重要性,但缺乏监测资源.
- 时空监测对于平衡城市增长与环境可持续性至关重要.
研究的目的:
- 为奥兰多大都会地区 (2013-2021) 开发高分辨率两年一度的树冠地图.
- 为城市森林管理和规划提供可靠的数据集.
- 支持环境和公共卫生监测倡议.
主要方法:
- 利用国家农业图像计划 (NAIP) 的orthoimagery用于地图开发.
- 解决了包括传感器不一致,阴影,可变的观测时间和环境因素在内的挑战.
- 进行了广泛的基准验证,以评估准确性.
主要成果:
- 为2013-2021年生成高分辨率两年一度的树冠地图.
- 在树木检测中达到78%-89%的准确性,性能优于现有产品.
- 开发了一个数据集,这对于将城市规划与可行的管理策略联系起来至关重要.
结论:
- 开发的树冠地图为城市森林管理提供了宝贵的工具.
- 该数据集支持知情城市规划,环境监测和公共卫生倡议.
- 高精度的遥感数据对于城市可持续发展工作至关重要.
相关概念视频
Levels of Use of a GIS
15
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...
15
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
27
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
27
Survival Tree
39
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
39
GIS Software, Hardware, and Sources of GIS Data
22
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...
22
Topographic Surveying and Contours
25
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...
25
Methods of Obtaining Topography
28
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,...
28

