A national dataset of annual urban extent (1985-2015) in the conterminous United States using Landsat time series data

This dataset includes annual urban extent dynamics (1985-2015) in the conterminous United States at a 30m resolution.
(1) The dataset is organized by state (in total 49) in the conterminous US. Location of US states can be found in uploaded figure of “US_State.jpg”. Full names and abbreviations of states are provided in the Excel file of “US_StateList.xls”.
(2) The format of provided data is GeoTIFF, i.e., the georeferencing information was embedded within the TIFF file. Each dataset was projected to the Albers Equal Area Conic projection, with a spatial resolution of 30m.
(3) The legend in GeoTIFF file can be founded in the figure of “Legend.jpg”, and more detailed information about the urbanized year and the pixel value can be found in the file of “Year_Code_Loopup.csv”.

本数据集包含美国本土（不含阿拉斯加与夏威夷的48个毗邻州）1985年至2015年的年度城市范围动态变化数据，空间分辨率为30米。
(1) 数据集按美国本土的州进行组织，共计49个州。美国各州的地理位置可参见上传的"US_State.jpg"图片。各州的完整名称与缩写信息已在"US_StateList.xls"Excel文件中提供。
(2) 所提供的数据格式为GeoTIFF，即地理参考信息已嵌入TIFF文件内。所有数据集均采用阿尔伯斯等面积圆锥投影（Albers Equal Area Conic），空间分辨率为30米。
(3) GeoTIFF文件的图例可参见"Legend.jpg"图片；有关城市化年份与像元值的详细信息，可查阅"Year_Code_Lookup.csv"文件。