This is a gdb file used in open data - The gdb has the Digital River Network (2 ha) This GIS layer is a vector dataset (polygons) representing individual capture zones or watersheds at 2ha flow accumulation threshold (i.e., 2ha is the minimum size of a headwater catchment), which comprises individual catchments with unique IDs. Each polygon represents the catchment delineated at 2ha flow accumulation threshold, which drains that area. Therefore, the Catchment_2ha layer was produced from a 1m-resolution flow accumulation raster by using a threshold of 20,000 cells.Detailed Methodology report describing the datasethttps://www.nrc.govt.nz/media/mqnjthi1/high-resolution-digital-river-network-for-northland.pdfOther Details:Data Provided By: Manas Chakraborty (Resource Scientist- Freshwater, NRC)
