Implementing the 1:24000 Scale NHD Model in Georgia

Information Technology Outreach Services

Process Summary

Pre-ConflationPrepare the Data

ConflationTransfer Reach Info

Post ConflationPutting it together

Database Summary

DLG-F Hydro Library

NHD_ED Library

NHDLibrary

ARCSTORM

Pre-Conflation

Hydro Data(e.g. DLG_F)

NHD Data Structure

GeometryProcesses

AttributionProcesses

Pre-ConflationGeometry Processes

ConflationWorking Unit is 10 Digit HUC

ARCEDIT

ARCVIEW

CONFLATION

QC & QCC

DATABASE

Conflation

Conflation

ConflationConflation Tools

ConflationConflation Tools

Conflation QC Tools

Conflation QC Tools

Post ConflationWorking Unit is 8 Digit HUC

NHD_EDLibrary

NHDDatabase

MultipleProgrammatic

Processes

Post ConflationWorking Unit is 8 Digit HUC

• Flip

• Level

• Routes

• Combine

• Regions

• Com_ids

• Rflow

• DUU