Subregions (HU4)

This dataset includes subregions (4-digit HU) for Texas. This dataset consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 1.0 - Federal Standards for Delineation of Hydrologic Unit Boundaries 3/01/02 (http://www.fgdc.gov/standards/projects/FGDC-standards-projects/hydro-unit-boundaries/ ). For original metadata, go to http://datagateway.nrcs.usda.gov/. This dataset was downloaded from http://nhd.usgs.gov/data.html and processed but otherwise unaltered. This file is for reference use only. NCTCOG and its members are not responsible for errors or inaccuracies in the file.本数据集包含德克萨斯州的4位水文单元（Hydrologic Unit，HU）子区域。本数据集由遵循《联邦地理数据委员会（Federal Geographic Data Committee，FGDC）提案1.0版——水文单元边界划定联邦标准（2002年3月1日）》（http://www.fgdc.gov/standards/projects/FGDC-standards-projects/hydro-unit-boundaries/ ）创建的地理参考数字数据及关联属性构成。如需获取原始元数据（Metadata），请访问http://datagateway.nrcs.usda.gov/。本数据集从http://nhd.usgs.gov/data.html 下载并经处理，其余内容未作改动。本文件仅用于参考用途。北中德克萨斯政府间理事会（NCTCOG）及其成员不对本文件中的错误或不准确之处承担责任。