VegScape - Vegetation Condition Explorer

VegScape https://nassgeodata.gmu.edu/VegScape/ delivers interactive vegetation indices so that web users can explore, visualize, query, and disseminate current vegetative cover maps and data without the need for specialized expertise, software, or high end computers. New satellite-based data are loaded on a weekly basis during the growing season. One can compare year-to-year change since the year 2000, compare conditions at a given times to mean, median and ratio vegetative cover, and can overlay a crop mask to help identify crop land versus non-crop land, among many functions. Vegetation indices, such as the NDVI (Normalized Difference Vegetation Index), and mean, median, and ratio comparisons to prior years have proven useful for assessing crop condition and identifying the land area impacted by floods, drought, major weather anomalies, and vulnerabilities of early/late season crops. The National Aeronautics Space Administration's MODIS satellite is used for this project and provides imaging at 250 meter (15 acres) per pixel resolution. Additionally, the data can be directly exported to Google Earth for mashups or delivered to other applications via web services.
NASS developed both the CropScape and VegScape web services in cooperation with the Center for Spatial Information Science and Systems, George Mason University, Fairfax, VA.
For more information about this dataset, contact:
Rick Mueller: [e-mail]
USDA, NASS, Spatial Analysis Research Section staff: [e-mail] Resources in this dataset:Resource Title: VegScape - Vegetation Condition Explorer web site. File Name: Web Page, url: https://nassgeodata.gmu.edu/VegScape/ Web interface supporting data query by layers (Global Cover, Cropland Data Layer, Boundaries, Water Layers, Road Layers, Data layers), Products (Type, Period, Year, Date). Toolbar buttons help define a wide range of map and query operations, data display, and download options.

VegScape（https://nassgeodata.gmu.edu/VegScape/）提供交互式的植被指数，使网络用户能够无需专业学识、软件或高端计算机，即可探索、可视化、查询和传播当前的植被覆盖图和数据。在生长季节期间，每周都会更新基于新卫星数据。用户可对比自2000年以来的年际变化，将特定时间点的状况与平均、中位数和比值植被覆盖进行比较，并可叠加作物掩膜以帮助识别耕地与非耕地，诸多功能中仅为一隅。植被指数，如归一化植被指数（NDVI），以及与前几年均值、中位数和比值的比较，已被证实对于评估作物状况和识别受洪水、干旱、重大天气异常以及早/晚季作物脆弱性影响的地域具有重要意义。该项目采用美国国家航空航天局（NASA）的MODIS卫星，提供每像素250米（15英亩）分辨率的成像。此外，数据可以直接导出到Google Earth进行混搭，或通过网络服务发送到其他应用程序。美国国家农业统计局（NASS）与乔治梅森大学空间信息科学和系统中心合作开发了CropScape和VegScape网络服务。有关该数据集的更多信息，请联系：Rick Mueller：[e-mail]；美国农业部（USDA）、NASS、空间分析研究部门工作人员：[e-mail]。本数据集中包含的资源：资源标题：VegScape - 植被状况探索网站。文件名：网页，网址：https://nassgeodata.gmu.edu/VegScape/。支持通过层（全球覆盖、耕地数据层、边界、水域层、道路层、数据层）进行数据查询的产品（类型、周期、年份、日期）。工具栏按钮有助于定义广泛的地图和查询操作、数据展示和下载选项。