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Elevation-Derived Hydrography Data Acquisition Specifications: Table of Contents

By NGP Standards and Specifications

The most recent version of the Elevation-Derived Hydrography Data Acquisition Specifications is 2024 rev. A2. This specification will be adopted for data deliveries later this year.

The current delivery version of the Elevation-Derived Hydrography Data Acquisition Specifications is 2023 rev. A2 found at the bottom of this page as a pdf download. This specification is associated with schema 1.4.

Return to Elevation-Derived Hydrography Specifications Homepage
Downloads
Most Recent Revision as PDF
  • Elevation-Derived Hydrography Data Acquisition Specifications 2024 rev. A2 (.pdf)
Schema Templates

 

Table of Contents
Introduction
Collection Area
Coordinate Reference System
Source Raster Data Requirements
Attribute Table Structure

Feature Codes and Values
Delineation of Hydrographic Features
Coordinate Precision
Topology
Positional Assessment
Alignment
Metadata

Delivered Products and Formats

References
Appendix 1. Representation, Extraction, Attribution, and Delination (READ) Rules
Appendix 2. Hydrologically Conditioned and Enforced DEM
Appendix 3. Using Geomorphic Derivatives to Validate the Position of Hydrographic Features
Appendix 4. Difference DEM
Appendix 5. Raster Spatial Reference Requirements

Tables
Elevation-Derived Hydrography Acquisition Specifications Revision History
  • Elevation-Derived Hydrography Data Acquisition Specifications 2024 rev. A (.pdf)
  • Elevation-Derived Hydrography Data Acquisition Specification 2023 rev. A2 (pdf)
  • Elevation-Derived Hydrography Data Acquisition Specifications 2022 rev. A (pdf)
  • Elevation-Derived Hydrography Data Acquisition Specifications 2021 rev. A (pdf)
  • Elevation-Derived Hydrography Data Acquisition Specifications 2020 rev. A (pdf)
  • Elevation-Derived Hydrography Data Acquisition Specifications - Original Report
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