Black Hills National Forest 2019 Forest Inventory and Analysis data

The USDA Forest Service, Northern Research Station Forest Inventory and Analysis (FIA) program has prepared a collaborative Forest Inventory and Analysis data summary for the Black Hills National Forest (BHNF) in western South Dakota and northeastern Wyoming. The summary is based on double-intensity sampling (approximately one plot representing each 3,000 acres) from 2017-2018 and accelerated base-plot (approximately one plot representing each 6,000 acres) sampling for 2019. The 2019 data includes measurements of base plots that would typically be remeasured during the period 2020-2023. Included in this package is a summary spreadsheet containing 15 tables with graphs covering the timber resources, volume, growth, mortality, and harvest removals on the forest. Also included is a spreadsheet providing the associated sampling errors for these attributes. A customized version of the FIA EVALIDator data access tool is also provided, that allows additional queries for these Black Hills National Forest data.Data were collected as part of the ongoing forest inventory. Intensifications were made both temporally and spatially at the request of the Black Hills National Forest. By spanning a state boundary, these data require custom estimation units created for the Black Hills National Forest; this precludes loading into the current version of FIADB. FIA is sharing these data with the public through this mechanism until an updated tool is available online.美国农业部林务局北部研究站森林资源清查与分析（Forest Inventory and Analysis，简称FIA）项目组，为南达科他州西部与怀俄明州东北部的布莱克山国家森林（Black Hills National Forest，BHNF）编制了合作版森林清查与分析数据汇总成果。该汇总基于2017-2018年的双强度采样方案（约每3000英亩设置1个样地），以及2019年的加速基础样地采样方案（约每6000英亩设置1个样地）。2019年的数据包含了原本应在2020-2023年间复测的基础样地测量数据。本数据包内含1份汇总电子表格，其中包含15张涵盖该林区木材资源、蓄积量、生长量、死亡率及采伐移除量的表格与图表；此外还附带一份用于展示上述指标抽样误差的电子表格。同时还提供了定制化的FIA EVALIDator数据访问工具，支持对布莱克山国家森林的相关数据进行额外查询。本次数据采集作为常态化森林清查工作的一部分开展，根据布莱克山国家森林的需求，在时间与空间维度上均进行了采样强度强化。由于跨州界布设样地，本次数据需为布莱克山国家森林创建专属估算单元，因此无法导入当前版本的FIADB系统。美国农业部林务局FIA项目组将通过本渠道向公众共享该数据，直至线上更新工具上线。