Texas-Harvey Basemap - Addresses and Boundaries

This site provides access to download an ArcGIS geodatabase or shapefiles for the 2017 Texas Address Database, compiled by the Center for Water and the Environment (CWE) at the University of Texas at Austin, with guidance and funding from the Texas Division of Emergency Management (TDEM). These addresses are used by TDEM to help anticipate potential impacts of serious weather and flooding events statewide. This is part of the Texas Water Model (TWM), a project to adapt the NOAA National Water Model [1] for use in Texas public safety. This database was compiled over the period from June 2016 to December 2017. A number of gaps remain (towns and cities missing address points), see Address Database Gaps spreadsheet below [4]. Additional datasets include administrative boundaries for Texas counties (including Federal and State disaster-declarations), Councils of Government, and Texas Dept of Public Safety Regions. An Esri ArcGIS Story Map [5] web app provides an interactive map-based portal to explore and access these data layers for download.

The address points in this database include their "height above nearest drainage" (HAND) as attributes in meters and feet. HAND is an elevation model developed through processing by the TauDEM method [2], built on USGS National Elevation Data (NED) with 10m horizontal resolution. The HAND elevation data and 10m NED for the continental United States are available for download from the Texas Advanced Computational Center (TACC) [3].

The complete statewide dataset contains about 9.28 million address points representing a population of about 28 million. The total file size is about 5GB in shapefile format. For better download performance, the shapefile version of this data is divided into 5 regions, based on groupings of major watersheds identified by their hydrologic unit codes (HUC). These are zipped by region, with no zipfile greater than 120mb:
- North Tx: HUC1108-1114 (0.52 million address points)
- DFW-East Tx: HUC1201-1203 (3.06 million address points)
- Houston-SE Tx: HUC1204 (1.84 million address points)
- Central Tx: HUC1205-1210 (2.96 million address points)
- Rio Grande-SW Tx: HUC2111-1309 (2.96 million address points)

Additional state and county boundaries are included (Louisiana, Mississippi, Arkansas), as well as disaster-declaration status.

Compilation notes: The Texas Commission for State Emergency Communications (CSEC) provided the first 3 million address points received, in a single batch representing 213 of Texas' 254 counties. The remaining 41 counties were primarily urban areas comprising about 6.28 million addresses (totaling about 9.28 million addresses statewide). We reached the GIS data providers for these areas (see Contributors list below) through these emergency communications networks: Texas 9-1-1 Alliance, the Texas Emergency GIS Response Team (EGRT), and the Texas GIS 9-1-1 User Group. The address data was typically organized in groupings of counties called Councils of Governments (COG) or Regional Planning Commissions (RPC) or Development Councils (DC). Every county in Texas belongs to a COG, RPC or DC. We reconciled all counties' addresses to a common, very simple schema, and merged into a single geodatabase.

November 2023 updates: In 2019, TNRIS took over maintenance of the Texas Address Database, which is now a StratMap program updated annually [6]. In 2023, TNRIS also changed its name to the Texas Geographic Information Office (TxGIO). The datasets available for download below are not being updated, but are current as of the time of Hurricane Harvey.

References:
[1] NOAA National Water Model [https://water.noaa.gov/map]
[2] TauDEM Downloads [https://hydrology.usu.edu/taudem/taudem5/downloads.html]
[3] NFIE Continental Flood Inundation Mapping - Data Repository [https://web.corral.tacc.utexas.edu/nfiedata/]
[4] Address Database Gaps, Dec 2017 (download spreadsheet below)
[5] Texas Address and Base Layers Story Map [https://www.hydroshare.org/resource/6d5c7dbe0762413fbe6d7a39e4ba1986/]
[6] TNRIS/TxGIO StratMap Address Points data downloads [https://tnris.org/stratmap/address-points/]

本网站提供下载2017年德克萨斯州地址数据库的ArcGIS地理数据库或shapefiles，该数据库由德克萨斯大学奥斯汀分校水资源与环境中心（CWE）编制，并在德克萨斯州紧急管理部（TDEM）的指导和资金支持下完成。这些地址由TDEM用于预测全州范围内严重天气和洪水事件可能产生的影响。这是德克萨斯州水资源模型（TWM）的一部分，该项目旨在将美国国家海洋和大气管理局（NOAA）的国家水模型[1]应用于德克萨斯州公共安全。该数据库的编制时间跨度为2016年6月至2017年12月。数据库中仍存在一些空白（缺少城镇和城市的地址点），请参阅下方的地址数据库空白区域电子表格[4]。此外，还包括德克萨斯州各县的行政边界（包括联邦和州级灾害声明）、政府委员会和德克萨斯州公共安全地区。一个Esri ArcGIS Story Map[5]网络应用程序提供了一个基于交互式地图的门户，用于探索和下载这些数据层。该数据库中的地址点包括“最近排水点以上高度”（HAND）属性，单位为米和英尺。HAND是一个通过TauDEM方法[2]处理开发的高程模型，基于美国地质调查局（USGS）国家高程数据（NED），水平分辨率为10米。HAND高程数据和10米NED的北美大陆数据可从德克萨斯州高级计算中心（TACC）[3]下载。完整的全州数据库包含约928万个地址点，代表约2800万人口。总文件大小约为5GB，采用shapefile格式。为了提高下载性能，根据水文单元代码（HUC）确定的各大流域的分组，将数据分为5个区域，每个区域的zip文件不超过120MB：
- 北德克萨斯州：HUC1108-1114（52万个地址点）
- 达拉斯-沃斯堡-东德克萨斯州：HUC1201-1203（306万个地址点）
- 休斯顿-东南德克萨斯州：HUC1204（184万个地址点）
- 中部德克萨斯州：HUC1205-1210（296万个地址点）
- 里奥格兰德-西南德克萨斯州：HUC2111-1309（296万个地址点）。还包括其他州和县边界以及灾害声明状态。

编制说明：德克萨斯州州级紧急通信委员会（CSEC）提供了前300万个地址点，代表德克萨斯州254个县中的213个。剩余的41个县主要是城市地区，包含约628万个地址（总计约928万个地址）。我们通过紧急通信网络（德克萨斯州9-1-1联盟、德克萨斯州紧急GIS响应团队（EGRT）和德克萨斯州GIS 9-1-1用户组）联系了这些地区的GIS数据提供商。地址数据通常以称为政府委员会（COG）、区域规划委员会（RPC）或发展委员会（DC）的县分组组织。德克萨斯州的每个县都属于一个COG、RPC或DC。我们将所有县的地址与一个非常简单的模式进行协调，并将其合并到一个地理数据库中。

2023年11月更新：2019年，德克萨斯州自然资源信息中心（TNRIS）接管了德克萨斯州地址数据库的维护工作，该数据库现在是每年更新的StratMap项目[6]。2023年，TNRIS还将其名称更改为德克萨斯州地理信息办公室（TxGIO）。下述可下载的数据集不再更新，但截至哈维飓风发生时都是最新的。

参考文献：
[1] NOAA国家水模型[https://water.noaa.gov/map]
[2] TauDEM下载[https://hydrology.usu.edu/taudem/taudem5/downloads.html]
[3] NFIE大陆洪水淹没制图-数据存储库[https://web.corral.tacc.utexas.edu/nfiedata/]
[4] 地址数据库空白区域，2017年12月（下载以下电子表格）
[5] 德克萨斯州地址和基础层Story Map[https://www.hydroshare.org/resource/6d5c7dbe0762413fbe6d7a39e4ba1986/]
[6] TNRIS/TxGIO StratMap地址点数据下载[https://tnris.org/stratmap/address-points/]