NHDPlusHR Crosswalk with NHDPlusMR
Plan to create two tables of hydrolocations that relate inlet and outlet nodes to flowlines in the other dataset.
id | type | mainstem | reference_id | reference_id_measure |
---|---|---|---|---|
identifier of point feature | type of point feature | id of reference feature | measure along reference feature |
type: inlet, outlet
reference_id_measure: 0 at inlet, 100 at outlet
Process requirements: inlet and outlet locations with known mainstems full flowline geometry from the reference dataset with known mainstems
Strategy: Build process input lists from each data source based on mainstem id. First build out cross-region paths then iterate through hu04.
Implementation: The nhdplushr workflow will generate all process artifacts as iteration through HU04s will be easiest there.
Edited by Blodgett, David L.