Terrestrial Condition Assessment (TCA) Road Density
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Direct Download (Raster Data Gateway) Objective: Identify locations where roads are present at a density that impacts the quality of wildlife habitat and fragments the landscape. Data: A national roads vector dataset has been acquired from the USGS National Transportation Dataset. The data were reattributed to represent three classes: (1) Unimproved, (2) Paved, (3) Light Duty roads. The new classes correspond to the following classes from the National Transportation Dataset: Unimproved: Four-wheel drive roads. Paved: Controlled access highway, Secondary Highway or Major Connecting Road, Ramps Light Duty: Local Connecting Roads, Local Roads Data Format: Polylines were converted to a raster for each TCA assessment year. The value at a pixel corresponds to the class of road at that location. Values differ slightly between the years: 2024: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other 2023: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other 2022: 1- Light Duty, 2- Paved, 3- Unimproved 2021: 1- Light Duty, 2- Paved, 3- Unimproved 2020: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other, 5- Decommissioned Spatial Resolution: 10m Source data: USGS National Transportation Dataset Additional Resources: Details on Method Changes and Source Data Versions Overview of the Terrestrial Condition Assessment: TCA Hubsite or Landfire Office Hour Presentation Explore the results of the most recent assessment: TCA Interactive Data Viewer Learn more about the TCA KPI: TCA Dashboard *if you have trouble viewing the Dashboard, please submit a Tableau Viewer Access Request
直接下载(栅格数据网关) 研究目标:识别道路密度足以影响野生动物栖息地质量、且造成景观破碎化的区域。 数据集说明:已从美国地质调查局(United States Geological Survey, USGS)国家交通数据集获取国家级道路矢量数据集。该数据已被重新归类为三大类别:(1) 未铺装道路,(2) 铺装道路,(3) 轻型道路。新分类对应国家交通数据集的如下类别: 未铺装道路:四驱车辆通行道路。 铺装道路:控制出入高速公路、次级公路或主要联络道路、匝道。 轻型道路:本地联络道路、地方道路。 数据格式:针对每一个陆地状况评估(Terrestrial Condition Assessment, TCA)年度,已将矢量多段线数据转换为栅格数据。每个像素的像素值对应该位置的道路类别。各年度的像素值定义略有差异: 2024年:1-轻型道路,2-铺装道路,3-未铺装道路,4-其他 2023年:1-轻型道路,2-铺装道路,3-未铺装道路,4-其他 2022年:1-轻型道路,2-铺装道路,3-未铺装道路 2021年:1-轻型道路,2-铺装道路,3-未铺装道路 2020年:1-轻型道路,2-铺装道路,3-未铺装道路,4-其他,5-已废弃道路 空间分辨率:10米 源数据:美国地质调查局(USGS)国家交通数据集 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 门户网站或Landfire 办公时段演示文稿 查看最新评估结果:TCA 交互式数据查看器 了解更多关于TCA关键绩效指标(KPI)的信息:TCA 仪表盘 *若您在访问仪表盘时遇到问题,请提交Tableau查看器权限申请



