Terrestrial Condition Assessment (TCA) Insect and Disease Hazard

Direct Download (Raster Data Gateway)Objective: Identify areas with unhealthy forest conditions as evidenced by a combination of stand and environmental characteristics making them uncharacteristically vulnerable to insect and pathogen outbreaks.Data: The 2018 National Insect and Disease Risk Map (NIDRM) developed by USFS-FHAAST indicates locations where forests are stressed and susceptible to outbreaks of native and non-native insects and diseases. These include forests with overly high stand densities and where soil/site conditions contribute to drought. The basis for assigning risk is the expectation that 25% or more of live basal area (three times the natural background rate of mortality) will die over the next 15 years due to insects and diseases. Because the NIDRM 2018 map is the most recent update, it has been reused each year for TCA Assessments from 2020-present.Format: Raster data are binary: (1) at risk or (0) not at riskResolution: 240mSource: NIDRM 2018Additional Resources:Details on Method Changes and Source Data VersionsOverview of the Terrestrial Condition Assessment: TCA Hubsite or Landfire Office Hour PresentationExplore the results of the most recent assessment: TCA Interactive Data ViewerLearn more about the TCA KPI: TCA Dashboard*if you have trouble viewing the Dashboard, please submit a Tableau Viewer Access RequestThis 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.直接下载（栅格数据网关） 目标：识别森林健康状况不佳的区域——这类区域的林分与环境特征组合使其异乎寻常地易受虫害与病原体爆发影响。 数据说明：美国林务局FHAAST（USFS-FHAAST）编制的2018年全国虫害与疾病风险地图（National Insect and Disease Risk Map, NIDRM），标注了受胁迫且易受本土、外来虫害及疾病爆发影响的森林区域，涵盖林分密度过高、土壤/立地条件加剧干旱的森林。该风险分级的依据为：未来15年内，因虫害和疾病导致的活立木断面积死亡率将达到25%及以上（为自然背景死亡率的三倍）。由于2018年版NIDRM是当前最新的更新版本，2020年至今的陆地状况评估（Terrestrial Condition Assessment, TCA）每年均复用该地图。 数据格式：栅格数据为二值格式，(1) 代表处于风险中，(0) 代表未处于风险中 分辨率：240米 数据源：2018年NIDRM 补充资源： - 方法变更与源数据版本详情 - 陆地状况评估（TCA）概述：TCA枢纽站点或Landfire办公时段演示文稿 - 探索最新评估结果：TCA交互式数据查看器 - 了解更多TCA关键绩效指标（Key Performance Indicator, KPI）：TCA仪表板 *若无法正常查看仪表板，请提交Tableau查看器访问申请 本数据集记录取自纳入https://data.gov目录的美国农业部企业数据清单（USDA Enterprise Data Inventory）。本记录对应的数据资源包括：ISO-19139元数据、ArcGIS枢纽数据集、ArcGIS地理服务。如需完整信息，请访问https://data.gov。