Census Blocks - 2020

The US Census Blocks used for the 2020 decennial census in Clark County are the smallest geographic units used to summarize statistics from the 100-percent count of population on April 1, 2020. In Clark County, blocks may have a population as high as 2300, but on average, populated census blocks have around 90 people. (The median number is 49.) Attributes of census block areas report population by race, selected ethnic groups, and number of households. To protect privacy, the US Census has added inaccuracies to this dataset. So block-level data may be "fuzzy", but still useful for tasks such as redistricting. To find more about this, search the web on "US Census Differential Privacy." Census block boundaries usually follow fixed features such as roads. Census blocks are part of a "family" of summary areas. Census blocks are grouped into block groups, which are grouped into census tracts. As of October 2021, blocks only have basic population and race attributes. Additional attributes will be added in the near future. See Clark County Metadata克拉克县用于2020年十年一次人口普查的美国人口普查区块（US Census Blocks），是汇总2020年4月1日全面人口普查统计数据的最小地理单元。在克拉克县范围内，单个普查区块的人口规模最高可达2300人，但有常住人口的普查区块平均人口约为90人（中位数为49人）。普查区块的属性字段涵盖按种族、选定族群划分的人口数据以及家庭户数统计。为保护隐私，美国人口普查局（US Census）已在此数据集中添加了误差扰动，因此区块级数据可能存在“模糊性”，但仍可用于选区重划等相关任务。如需了解更多相关细节，可通过网络检索关键词“US Census Differential Privacy”。普查区块的边界通常沿道路等固定地物划定。普查区块属于汇总地理区域层级体系的组成部分：普查区块会被整合为区块组（block groups），区块组又会被整合为普查片区（census tracts）。截至2021年10月，本数据集仅包含基础的人口与种族属性，更多属性将在近期追加更新。详情请参阅克拉克县元数据（Clark County Metadata）。