Local-Resolution National Hydrographic Data Model
The purpose of this project is to develop a functional Local-Resolution hydrographic data
model for the State of Indiana. This project shall meet federal National Hydrography
Dataset (NHD) standards for High-Resolution and Local-Resolution watershed data set
forth by the United States Geological Survey (USGS).
The project will utilize current NHD 1:24,000 high-resolution hydrography source data
for Indiana and conflate this information to newly created 1:2,400 or 1:1,200
hydrography geometry created from Indiana's 2005 Orthophotography and DEM
datasets. The Local-resolution NHD data will be produced and delivered by individual
USGS-Hydrologic Unit Code (HUC) 8 Subbasins as defined by the exiting High Resolution NHD data, with edge-matching to all adjacent HUC 8 Subbasins (both inside
and outside of the State of Indiana).
