Firefighter Estimated Ground Evacuation (Image Service)

The estimated ground evacuation time layer is intended to provide a broad view of medical care accessibility to inform incident- and regional-level strategic risk assessment and mitigation planning. The estimated ground evacuation times account for hospital locations, driving speeds on the current road network, and off-road walking speeds influenced by topography, vegetation, slash/blowdown, and waterbodies. Evacuation times are binned into broad classes (0-1 hours, 1-2 hours, 2-4 hours, 4-6 hours, and > 6 hours) commensurate with the precision of the analysis. There are several limitations of this estimated ground evacuation time dataset that users should understand. The analysis assumes that the closest general acute care or critical access hospital will be the first stop to stabilize the patient. Incident level safety and medical planning may identify different preferred medical facilities based on their actual travel times and/or capabilities. These estimated evacuation times only account for the travel portion of an evacuation and should therefore be viewed as best-case estimates. Complicated injuries may require additional time for patient evaluation, care, packaging for transport, and/or transfer to a vehicle. Travel times are calculated under the assumptions that the litter crew can travel at the median pedestrian rate (influenced by landscape factors) and that the ambulance or other transport vehicle can travel at the designated road speed limits. Users of this dataset should be thoughtful of factors not accounted for in this analysis that could slow evacuations such as additional landscape characteristics, crew condition, or dynamic factors like weather, traffic, or road closures.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.

该估算地面疏散时间层旨在提供对医疗护理可达性的宏观视角，以供事件级和区域级战略风险评估及缓解规划之用。估算地面疏散时间考虑了医院位置、当前道路网络上的驾驶速度，以及地形、植被、砍伐/倒木和水体等因素对非道路步行速度的影响。疏散时间被归类为广泛的类别（0-1小时、1-2小时、2-4小时、4-6小时以及超过6小时），与分析的精确度相匹配。此估算地面疏散时间数据集存在一些限制，用户应予以理解。分析假设最近的一般急性护理或临界接入医院将是稳定患者的首个停靠点。事件级的安全和医疗规划可能会根据其实际旅行时间和/或能力识别出不同的首选医疗设施。这些估算疏散时间仅考虑疏散的旅行部分，因此应被视为最佳案例估计。复杂伤情可能需要额外的时间进行患者评估、护理、打包以供运输，以及/或转移至车辆。旅行时间是在以下假设下计算的：搬运队伍能够以受景观因素影响的平均步行速度行驶，以及救护车或其他运输车辆能够以指定的道路限速行驶。本数据集的使用者应深思熟虑分析中未考虑的、可能减缓疏散的因素，如额外的景观特征、队伍状况，或如天气、交通或道路关闭等动态因素。此记录摘自为https://data.gov目录提供数据的美国农业部企业数据清单。本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。