MODIS-based annual production estimates from 2000-2015 for rangelands in USFS grazing allotments in Region 5

This data publication contains an ESRI grid dataset describing annual productivity and drought in the non-forest domain of Region 5 (California) of the United States Forest Service (USFS). Production data were generated from the Rangeland Vegetation Simulator (RVS). This program uses Normalized Difference Vegetation Index (NDVI) from the Moderate Resolution Imaging Spectroradiometer (MODIS) from 2000-2015 at 250 square meter resolution to estimate production. NDVI is converted to production estimates using vegetation specific coefficients in the Rangeland Vegetation Simulator (RVS). In addition to annual production data (offered in pounds per acre), this ESRI grid dataset also provides an annual summation of drought data from the USDA drought monitor for aiding interpretation of annual production data. Both the production and drought data are offered from 2000-2015. In addition, basic relationships, such as correlation coefficients, between drought and productivity are offered so that the analyst can find anomalies in allotments where production is not matching temporal patterns of drought. The RVS was applied to allotments of Region 5 of the USFS. The allotment data were spatially combined with CalVeg (Classification and Assessment with Landsat of Visible Ecological Groupings) (a polygon based description of vegetation types for California and more information can be found at: https://www.fs.usda.gov/r5/rsl/projects/classification/system.shtml) layer to produce 4035 unique combinations of vegetation attributes and allotments. The vegetation classification used to do this combination was the Society for Range Management (SRM) cover type. There were 23 vegetation types considered to represent non-forested vegetation in the SRM classification found across the grazing allotments. The time period of analysis for this assessment across which production estimates were developed was also 2000-2015.This record was taken from the USDA Enterprise Data Inventory that feeds into the https://data.gov catalog. Data for this record includes the following resources: ISO-19139 metadata ArcGIS Hub Dataset ArcGIS GeoService For complete information, please visit https://data.gov.

本数据发布包含一个描述美国林务局（USFS）第五区（加利福尼亚州）非林地年度生产力与干旱的ESRI网格数据集。生产力数据由放牧植被模拟器（RVS）生成。该程序利用2000-2015年间中等分辨率成像光谱仪（MODIS）的归一化植被指数（NDVI），以250平方米的分辨率来估算生产力。NDVI通过放牧植被模拟器（RVS）中的植被特定系数转换为生产力估计。除了年度生产力数据（以每英亩磅计提供）外，此ESRI网格数据集还提供了年度干旱数据的年度汇总，这些数据来自美国农业部干旱监测，以协助解释年度生产力数据。生产力与干旱数据均提供自2000-2015年。此外，还提供了干旱与生产力之间的基本关系，如相关系数，以便分析师能够发现生产不匹配干旱时间模式的异常分配。RVS应用于美国林务局第五区的分配。分配数据在空间上与CalVeg（基于Landsat的分类和评估植被生态群组）图层相结合，以产生4035种独特的植被属性和分配组合。用于此组合的植被分类是社会草原管理协会（SRM）覆盖类型。在SRM分类中考虑了23种植被类型，以代表放牧分配中的非林地植被。评估的生产估计的时间范围为2000-2015年。本记录来自美国农业部企业数据目录，该目录输入到https://data.gov目录。此记录的数据包括以下资源：ISO-19139元数据、ArcGIS Hub数据集、ArcGIS GeoService。欲获取完整信息，请访问https://data.gov。