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    NIWA REC 2v5 (River Environment Classification) The REC has been used to classify all the rivers of New Zealand at a 1:50,000 mapping scale. The area classified comprises 267,000 km2 and 426,000 km of river network. This datasets is for the River Lines. Attributes associated directly with network: Field - Type - Description: Catarea Real Watershed area in m2 CUM_Area Real Area upstream of a reach (and including this reach area) in m2. Nzsegment Integer Reach identifier to be used with REC2 (supersedes nzreach in REC1). nz_fnode Integer Unique number of preceding river segment's outlet node. nz_tnode Integer Unique number of following river segment's inlet node. Lengthdown RealThe distance to coast from any reach to its outlet reach, where the river drains (m). Headwater Integer Number (0) denoting whether a stream is a “source” (headwater) stream. Non-zero for non-headwater streams. Hydseq Integer A unique number denoting the hydrological processing order of a river segment relative to others in the newtork. StreamOrder Integer A number describing the Strahler order a reach in a network of reaches. euclid_dist Real The straight line distance of a reach from the reach “inlet” to its “outlet”. upElev Real Height (asl) of the upstream end of a reach section in a watershed (m). downElev Real Height (asl) of the downstream end of a reach section in a watershed (m). upcoordX Real Easting of the upstream end of a river segment in m (NZTM2000). upcoordY Real Northing of the upstream end of a river segment in m (NZTM2000). downcoordX Real Easting of the downstream end of a river segment in m (NZTM2000). downcoordY Real Northing of the downstream end of a river segment in m (NZTM2000). sinuosityReal Actual distance divided by the straight line distance giving the degree of curvature of the stream nzreach_rec1 IntegerThe REC1 identifiying number for the corresponding\closest reach from REC1 (can be used to retrieve the REC management classes) headw_dist Integer Distance of the furthermost “source” or headwater reach from any reach (m). Shape_length RealThe length of the reach (vector) as calculated by ArcGIS. Segslpmax Real Maximum segment slope along length of reach. Segslpmean Real Mean segment slope along length of reach. LID Integer Lake Identifier number(LID) of overlapping lake. Reachtype Integer A value of 2 is assigned if the segment is an outlet to the lake, otherwise 0 or null. nextdownid integer segment number of the most downstream reach

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    NIWA's bathymetry model of New Zealand at a 250m resolution. The 2016 model is a compilation of data digitised from published coastal charts, digital soundings archive, navy collector sheets and digital multibeam data sourced from surveys by NIWA, LINZ, as well as international surveys by vessels from United States of America, France, Germany, Australia, and Japan. All data used is held at NIWA.Image service can be used for analysis in ArcGIS Desktop or ArcGIS Online - no need to download the data, just stream using this service and classify, symbolise, mask, extract or apply map algebra - just like you would with local raster files. https://enterprise.arcgis.com/en/server/latest/publish-services/windows/key-concepts-for-image-services.htmMap information and metadata Offshore representation was generated from digital bathymetry at a grid resolution of 250m. Sun illumination is from an azimuth of 315° and 45° above the horizon.Projection Mercator 41 (WGS84 datum). EPSG: 3994Scale 1:5,000,000 at 41°S. Not to be used for navigational purposes Bibliographic reference Mitchell, J.S., Mackay, K.A., Neil, H.L., Mackay, E.J., Pallentin, A., Notman P., 2012. Undersea New Zealand, 1:5,000,000.  NIWA Chart, Miscellaneous Series No. 92Further Information: https://www.niwa.co.nz/our-science/oceans/bathymetry/further-informationLicence: https://www.niwa.co.nz/environmental-information/licences/niwa-open-data-licence-by-nn-nc-sa-version-1_________________________________________________________________________________________________________________Item Page Created: 2017-11-01 00:55 Item Page Last Modified: 2022-06-11 18:10Owner: NIWA_OpenData

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    The Inundation index is called: CSI_inThe coastal change index is called: CSI_ccEach index is to be displayed over 12 evenly spaced intervals (range and intervals will be different for both indexes) using a blue-red color spectrum as shown in 'Legend.jpg'The legend is be labeled; 'Lower', 'Moderate', 'Higher' as per the example in 'Legend.jpg'----------------------------------------------------------------------------------------------------The file also contains the updated Coastal Classification data.Variable in shape file Coastal explorer variable-------------------------|-------------------------------EXPOSURE = Beach ExposureSHORE_TYPE = Coastal landform typeFS = Foreshore sediment typeHINTERLAND = Hinterland CharacteristicsThe only new variable is an addition to 'Coastal landform type'where ibb = incipient barrier beach