Northern Plains High Resolution Land Cover

This image service contains high-resolution land cover data for the states of Nebraska, South Dakota, and North Dakota. These data are a digital representation of land cover derived from 1-meter aerial imagery from the USDA National Agriculture Imagery Program (NAIP.) The year of NAIP used for each state was 2014. Data are intended for use in rural areas and therefore do not include land cover in cities and towns. Land cover classes (tree cover, other land cover, or water) were mapped using an object-based image analysis approach and supervised classification. These data are designed for conducting geospatial analyses and for producing cartographic products. In particular, these data are intended to depict the location of tree cover in the county. The mapping procedures were developed specifically for agricultural landscapes that are dominated by annual crops, rangeland, and pasture and where tree cover is often found in narrow configurations, such as windbreaks and riparian corridors. Because much of the tree cover in agricultural areas of the United States occurs in windbreaks and narrow riparian corridors, many geospatial datasets derived from coarser-resolution satellite data (such as Landsat), do not capture these landscape features. This dataset is intended to address this particular data gap. These data can be downloaded by county at the Forest Service Research Data Archive. Nebraska: https://www.fs.usda.gov/rds/archive/catalog/RDS-2019-0038 South Dakota: https://www.fs.usda.gov/rds/archive/catalog/RDS-2022-0068 North Dakota: https://www.fs.usda.gov/rds/archive/catalog/RDS-2022-0067 A Kansas dataset was also developed using the same methods and is located at: Kansas data download: https://www.fs.usda.gov/rds/archive/catalog/RDS-2019-0052 Kansas map service: https://data-usfs.hub.arcgis.com/documents/high-resolution-tree-cover-of-kansas-2015-map-service/explore本影像服务涵盖美国内布拉斯加州、南达科他州与北达科他州的高分辨率土地覆被数据。该数据集是以美国农业部（United States Department of Agriculture，USDA）国家农业影像计划（National Agriculture Imagery Program，NAIP）获取的1米分辨率航空影像为数据源生成的土地覆被数字化表征成果。各州所使用的NAIP影像采集年份均为2014年。本数据集仅面向农村区域应用，未包含城镇区域的土地覆被信息。本次土地覆被分类涵盖树覆被、其他土地覆被与水体三类，采用面向对象影像分析与监督分类方法完成。本数据集可用于开展地理空间分析与制作制图产品，核心目标为精准呈现县域范围内的树覆被分布格局。本次制图流程专为以一年生作物、牧场与草原为主的农业景观开发——此类区域内的树覆被多呈窄带状分布，例如防风林带与河岸廊道。由于美国农业区域内的多数树覆被均以防风林带与窄状河岸廊道形式存在，许多基于低分辨率卫星数据（如陆地卫星（Landsat））生成的地理空间数据集无法捕捉此类精细景观特征。本数据集正是为填补这一特定数据空白而开发。用户可通过美国林务局研究数据档案馆按县域下载本数据集，各州县数据集下载地址如下： 内布拉斯加州：https://www.fs.usda.gov/rds/archive/catalog/RDS-2019-0038 南达科他州：https://www.fs.usda.gov/rds/archive/catalog/RDS-2022-0068 北达科他州：https://www.fs.usda.gov/rds/archive/catalog/RDS-2022-0067 此外，研究团队采用相同方法开发了堪萨斯州数据集，相关资源如下： 堪萨斯州数据集下载地址：https://www.fs.usda.gov/rds/archive/catalog/RDS-2019-0052 堪萨斯州影像服务地址：https://data-usfs.hub.arcgis.com/documents/high-resolution-tree-cover-of-kansas-2015-map-service/explore