tsgettoolbox.wdfn_hydrologic_unit_codes#
- tsgettoolbox.wdfn_hydrologic_unit_codes(*, geometry: Any = None, id: str = None, hydrologic_unit_name: str = None, hydrologic_unit_classification_code: str = None)#
US:station:::USGS WDFN Hydrologic unit codes as table
Hydrologic units are geographic areas representing part or all of a surface drainage basin or distinct hydrologic feature identified by a unique number (HUC), and a name. The United States is divided and sub-divided into successively smaller hydrologic units which are classified into four levels: regions, sub-regions, accounting units, and cataloging units. Each unit consists of two to eight digits based on the four levels of classification in the hydrologic unit system. Additional information can be found at <https://water.usgs.gov/GIS/huc.html>.
- Parameters:
geometry – The geometry parameter is used to filter the results by a specific geographic area. The value should be a GeoJSON geometry object.
id – Hydrologic unit code. The format of the code is (‘RRSSBBUUWWXX’) where: ‘RR’ is the 2-digit code for the region. ‘SS’ is the 2-digit code for the sub-region. ‘BB’ is the 2-digit code for the basin. ‘UU’ is the 2-digit code for the sub-basin. ‘WW’ is the 2-digit code for the watershed. ‘XX’ is the 2-digit code for the sub- watershed. Watersheds are delineated by USGS using a nationwide system based on surface hydrologic features. This system divides the country into 22 regions (2-digit), 245 subregions (4-digit), 405 basins (6-digit), ~2,400 subbasins (8-digit), ~19,000 watersheds (10-digit), and ~105,000 subwatersheds (12-digit). A hierarchical hydrologic unit code (HUC) consisting of 2 additional digits for each level in the hydrologic unit system is used to identify any hydrologic area (see Federal Standards and Procedures for the National Watershed Boundary Dataset - https://pubs.usgs.gov/tm/11/a3/).
hydrologic_unit_name – Hydrologic unit name.
hydrologic_unit_classification_code – Hydrologic unit classification code.