Georgia Lakes, Ponds, Reservoirs & Swamps

This layer was developed by the Natural Resources Department of the Atlanta Regional Commission. The dataset contains polygonal hydrographic features including lakes, ponds, reservoirs, swamps, and marshes. Original data were captured from the NHDWaterbody geospatial data layer included in the High Resolution National Hydrography Dataset Plus (NHDPlus HR). Features in the NHDWaterbody geospatial layer that intersected the Georgia State boundary were selected and spatially joined to Georgia county boundaries and the WBDHU8 geospatial data layer found in the U.S. Geological Survey's Watershed Boundary Dataset. Layers were spatially joined using the Largest Overlap matching method. The spatial join was removed upon calculating values for the COUNTY_FIPS, COUNTY_NAME, HUC8_ID, and HUC8_SUBBASIN attributes. The CLASS attribute was created to identify Lakes equal to or larger than 10 acres as Major and less than 0.5 acres as Minor. Data in the HYDRO_CAT and RESERVOIR_TYPE attributes were sourced from values encoded in the Feature Code (FCode) field of the NHDWaterbody geospatial data layer. Attributes: FEATURE = Type of hydrologic feature 361 = Playa 378 = Ice Mass 390 = LakePond 436 = Reservoir 466 = SwampMarsh 493 = Estuary CLASS = Class used to identify major and minor waterbodies GNIS_ID = A permanent, unique number assigned by the Geographic Names Information System (GNIS) to a geographic feature name for the sole purpose of uniquely identifying that name application as a record in any information system database, dataset, file, or document GNIS_NAME = The Geographic Names Information System (GNIS) assigned proper name, specific term, or expression by which a particular geographic entity is known. HUC8_ID = 8-digit hydrologic unit code used to identify subbasins in the hydrologic unit system HUC8_SUBBASIN = Subbasin name of the 8-digit hydrologic unit code in the hydrologic unit system COUNTY_FIPS = County Federal Information Processing System (FIPS) code COUNTY_NAME = County name HYDRO_CAT = Hydrographic feature category RESERVOIR_TYPE = Type of reservoir ACRES = Area of the feature in acres ELEVATION = The vertical distance from a given datum GlobalID = A type of UUID (Universal Unique Identifier) in which values are automatically assigned by the geodatabase when a row is created last_edited_user = User to last edit feature last_edited_date = Date feature was last edited Shape = Feature geometry Shape_Length = Length of the feature, which may differ from the field measured length due to differences in calculation. Units are map units. Shape_Area = Area of feature in map units squared Source: U.S. Geological Survey, National Geospatial Program Date: 2023