NZ Local River Names (based on REC2) Layer can be used to display New Zealand rivers and their names.The
River Environment Classification (REC) is a database of catchment
spatial attributes, summarised for every segment in New Zealand's
network of rivers. The attributes were compiled for the purposes of
river classification. Examples where the REC can be used include,
catchment rainfall calculations, catchment river flows, flood
forecasting, land use and catchment associations.CreationThe REC was originally created using hydrological networking tools and a digital elevation model.River names have been attached where available.REC2 (River Environment Classification, v2.5) - June 2019 [Hosted Feature Layer]This service depicts rivers as linesThe River Environment Classification (REC) is a database of
catchment spatial attributes, summarised for every segment in New
Zealand's network of rivers. The attributes were compiled for the
purposes of river classification, while the river network description
has been used to underpin models. Typically, models (e.g. CLUES and
TopNet) would use the dendritic (branched) linkages of REC river
segments to perform their calculations. Since its release and use over
the last decade, some errors in the location and connectivity of these
linkages have been identified. The current revision corrects those
errors, and updates a number of spatial attributes with the latest data.
REC2 provides a re-cut framework of rivers for modelling and
classification. It is built on a newer version of
the 30m digital elevation model, in which the original 20m contours were
supplemented with, for example, more spot elevation data and a better
coastline contour. Boundary errors were minimised by processing
contiguous areas (such as the whole of the North Island) together, which
wasn't possible when it was originally created.Major
updates include the revision of catchment land use information, by
overlaying with the land cover database (LCDB3, current as at 2008), and
the update of river and rainfall statistics with data from 1960-2006.
The river network and associated attributes have been assembled within
an ArcGIS geodatabase. Topological connectivity has been established to
allow upstream and downstream tracing within the network. REC2 can be downloaded or streamed and used directly in ArcMap. (A file geodatabase version for ArcGIS of REC2 can be downloaded as a
zip file and used directly for analyses in ArcMap from here)This is based on REC2 (Version 5) , June 2019 - a publicly available dataset from NIWA Taihoro Nukurangi.NIWA acknowledges funding from the MBIE SSIF towards the preparation of REC v2.5Coordinate Reference System: NZTM (New Zealand Transverse Mercator, EPSG: 2193)Geometric Representation of Rivers: LinesExtent (Bounding Box):
Top(Latitude)
-33.9534Bottom(Latitude)
-47.4867
Left (Longitude)
166.2634
Right (Longitude)
178.9733
_________________Item Page Created: 2022-01-19 03:43 Item Page Last Modified: 2025-04-05 18:03Owner: NIWA_OpenDataNZ Rivers and NamesNo data edit dates availableFields: CATAREA,CUM_AREA,nzsegment,LENGTHDOWN,Headwater,StreamOrde,upElev,downElev,headw_dist,segslpmean,LID,reachtype,FROM_NODE,TO_NODE,Shape_Leng,RivName
