Abstract

From LiDAR terrain to NHD Local Resolution, Urban and Rural Workflows
Track: Water Resources
Authors: Brian Quinn

We developed a workflow that applies 2ppsm LiDAR over county watersheds to yield NHD Local Resolution flow lines at parcel-compatible scale near 1:2400 map accuracy. The workflow is shared with others who develop NHD Local flow lines.
We use LAS Datasets for class edits, Terrain Datasets to grid terrain, manually build hydro-enforcement for ArcHydro, and conflate ReachCode, FCode and GNIS name from NHD High to produce Local resolution flow lines. The flow lines guide county creek protections.