This is a gdb file used in open data - The gdb has the Digital River Network (0.2 ha) This GIS layer is a vector dataset (polygons) representing individual catchments drawn at 0.2ha flow accumulation threshold (i.e., 0.2ha is the minimum size of a headwater catchment). Therefore, the Catchment_2k layer was produced from a 1m-resolution flow accumulation raster by using a threshold of 2000 cells. This means the upstream starting point (or headwater point) of stream segment was located where there is an upstream contributing areas of 0.2ha.Detailed Methodology report describing the datasethttps://www.nrc.govt.nz/resource-library-summary/research-and-reports/rivers-and-streams/high-resolution-digital-river-network-for-northland/Other DetailsData Provided By: Manas Chakraborty (Resource Scientist- Freshwater, NRC)
