U.S. Social Vulnerability Index, v1 (2000, 2010, 2014, 2016, 2018)

The U.S. Social Vulnerability Index Grids data set contains gridded layers for the overall Centers for Disease Control and Prevention (CDC) Social Vulnerability Index (SVI) using four sub-category themes (Socioeconomic, Household Composition Disability, Minority Status Language, and Housing Type Transportation) based on census tract level inputs from 15 variables for the years 2000, 2010, 2014, 2016, and 2018. SVI values range between 0 and 1 based on their percentile position among all census tracts in the U.S., with 0 representing lowest vulnerability census tracts and 1 representing highest vulnerability census tracts. SEDAC has gridded these vector inputs to create 1 km spatial resolution raster surfaces allowing users to obtain vulnerability metrics for any user-defined area within the U.S. Utilizing inputs from CIESIN's Gridded Population of the World, Version 4, Revision 11 (GPWv4.11), a mask is applied for water, and optionally, for no population. The data are provided in two different projection formats, NAD83 as a U.S. specific standard, and WGS84 as a global standard. The goal of the SVI is to help identify vulnerable communities by ranking them on these inputs across the U.S.

美国社会脆弱性指数格网数据集包含基于2000、2010、2014、2016及2018年共15个变量的普查区层级输入数据，涵盖美国疾病控制与预防中心（Centers for Disease Control and Prevention, CDC）社会脆弱性指数（Social Vulnerability Index, SVI）的四大子类别主题：社会经济、家庭构成与残疾、少数族裔身份与语言、住房类型与交通。SVI的取值范围为0至1，基于全美所有普查区中的百分位排名确定，其中0代表脆弱性最低的普查区，1代表脆弱性最高的普查区。社会经济数据与应用中心（Socioeconomic Data and Applications Center, SEDAC）将上述矢量输入数据进行格网化处理，生成空间分辨率为1公里的栅格表面，支持用户获取美国境内任意自定义区域的脆弱性评估指标。本数据集以国际地球科学信息网络中心（Center for International Earth Science Information Network, CIESIN）的世界格网人口第4版修订版11（Gridded Population of the World, Version 4, Revision 11, GPWv4.11）作为输入依据，同时针对水体区域及可选的无人口区域应用掩膜处理。数据提供两种投影格式：作为美国本土标准的NAD83，以及作为全球通用标准的WGS84。本数据集的设计目标是通过对全美范围内的上述输入指标进行排名，助力识别脆弱社区。