Named Catchment Network

Build a hierarchical network of named catchments by linking USGS GNIS (Geographic Names Information System) features to NHD/UHD catchment polygons. Produces drainage polygons with official names, categories, centroids, poles of inaccessibility, and parent-child relationships.

ID	hydrology_catchment_network
Domain	geo
Category	hydrology
Type	composite
Version	1.0.0

view yaml ◦view github ◦

Parameters

min_area_km2: number · default 0.5 · Minimum catchment area to include (filters tiny drainages)
max_hierarchy_depth: integer · default 5 · Maximum nesting depth for parent-child relationships
gnis_distance_threshold_km: number · default 5 · Maximum distance from GNIS point to catchment centroid for matching. GNIS points should be close to the drainage they name.
centroid_method: enum · default geographic · Method for computing representative point
include_centerlines: boolean · default true · Include main channel linestring in output
include_historical: boolean · default false · Use historical GNIS records to fill naming gaps
category_mapping: object · default [object Object] · Mapping from GNIS feature class to output category