Elevation-Derived Hydrography Data Acquisition Specifications: Delivered Products and Formats Requirements

Elevation-Derived Hydrography Data Acquisition Specifications

Delivered Products and Formats Requirements

Delivered products shall include the following:

A polygon defining the complete boundary of the DPA,
- Polygons defining any areas within the DPA that were not included in the hydrography collection.
A hydrography dataset that adheres to all specifications herein,
- Data will be delivered as a current version of shapefile, file geodatabase, or Open Geospatial Consortium GeoPackage.
- Points, lines, and polygons will have 3D geometry.
A seamless DEM from which the hydrography was derived.
- The DEM should be in the resolution and spatial reference system defined within this document.
- A minimum buffer of 250 meters should extend outside of the project area.
- Have an accompanying spatial metadata layer that identifies the source lidar data used as a source for the seamless DEM.
- If 3DEP hydroflattening breaklines are available for the source elevation datasets, they shall be provided with the elevation derived hydrography delivery as one dataset.
- A spatial metadata layer that describes the source lidar data used.
Metadata describing the final dataset,
A summary of any accuracy assessments completed on the data. The USGS National Geospatial Program is the maintenance authority for this document.