An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham and New Zealand's offshore Islands, at 1:50,000 scale.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for New Zealand and it's offshore dependancies, at 1:50,000.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

Note: This file contains the entire Contours 2016 dataset. For extracts of 6 square kilometres or less, use the Extract Data tool on GeoMaps.Contours dataset generated from LiDAR data captured between 2016 – 2018.Vertical datum: NZVD2016Auckland NorthLidar was captured for Auckland Council by Aerial Surveys ASL between August 2016 to August 2018. The dataset was generated by Aerial Surveys and their subcontractors. The survey area includes Auckland CBD, Great Barrier Island, Little Barrier Island, North Shore, Waiheke Island, Wellsford, Whangaparaoa, Whatipu, and the surrounding area.Survey Date: 08/01/2016 - 08/01/2018Auckland SouthLidar was captured for Auckland Council by AAM New Zealand between September 2016 through to June 2017. The original dataset was generated by AAM New Zealand and their subcontractors. The survey area covers the southern Auckland suburbs and regions.Survey Date: 09/09/2016 - 02/06/2017License: Creative Commons 4.0Additional InfoThe vendors’ quality management system for point-location comprised Airborne Global Position System (AGPS for spatial location), inertial measurement unit (IMU for aircraft orientation), and raw laser return (as returns 1,2,3,4) with attributes number/time/angle etc., which allow geometric calculation of actual laser strike location at ground level. AGPS locations were refined by corrections made relative to base stations on the ground. The resultant LAS file (v1.2 format) is an international standard binary package for LiDAR data with return, intensity value, xyz coordinates, and other classification attributes. Target raw point density was 4 points/m2 on open ground with actual density varying around this target depending on ground cover and terrain interference. LiDAR swaths were flown with 25% overlap. Tidal areas were flow within 1.5 hours of gazetted low tide (noting local variation in actual lowest water level). Raw points were classified to ICSM level 3 (99% accuracy on ground point designation), with full class set as per the following Classification [1=unclassified, 2=bare ground, 3= low vegetation, 4=medium vegetation, 5=high vegetation, 6=buildings/structures, 7=low/high points, 9=water, 10=bridge, 12=surplus points at swath overlap].Data are stored in LINZ Topo50 1k tiles (720m x 480m). Enforced levels (‘hydro-flattening’) were applied to static water bodies.Specifications (ASL / AAM): Scan angle (34-36 / 20-29deg); Pulse rate (150/320-330 kHz); Laser footprint size ~0.3; Target lidar ground point vertical accuracy (RMS 0.1m, 95% CL ~ 0.3m); Horizontal accuracy (0.3m); Vertical accuracy from limited validation (95% CL ~0.1, AAM only); DEM / DSM / Intensity grid (1m spacing); Contours (line geometry) 0.25m elevation steps. Coastal and intertidal data was collected at within 1.5 hours either side of low tide.

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

Although captured and presented at 1:25,000 this layer, for all intents and purposes, forms part of the Topo50 map series.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

This layer is a component of the Topo250 map series. The Topo250 map series provides topographic mapping for the New Zealand mainland and Chatham Islands, at 1:250,000 scale.

Further information on Topo250: http://www.linz.govt.nz/topography/topo-maps/topo250

In addition to contour lines, relief shading helps visualise the terrain. Hills and valleys are shaded as if they were illuminated from the north-west.

Relief layers were generated for each sheet, and specifically for use in the Topo50 map series. There may be subtle differences in the relief shading of adjacent map sheets. Where no contour information exists, relief shading has not been produced.

The Topo50 map series provides topographic mapping for the New Zealand mainland, the Chatham Islands, and offshore islands at 1:50,000 scale (some of the islands at 1:25,000).

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

This layer is a component of the Topo250 map series. The Topo250 map series provides topographic mapping for the New Zealand mainland and Chatham Islands, at 1:250,000 scale.

Further information on Topo250: http://www.linz.govt.nz/topography/topo-maps/topo250

The Topo50 map series provides topographic mapping for the New Zealand mainland, the Chatham Islands, and offshore islands at 1:50,000 (some of the islands at 1:25,000) scale.

Along with the paper-based Topo50 map series, digital images of the maps are also publicly available.

Georeferenced raster digital images are provided at a resolution of 300 DPI. Georeferencing allows adjacent maps to be accurately and automatically aligned within GIS systems.

For more information, and a description of the georeferencing keys: http://www.linz.govt.nz/topography/topo-maps/topo50/digital-images

Please be aware of the following:

• The existence of a road or track does not necessarily indicate public right of access.

• Closed tracks are defined as being no longer maintained or passable and should not be used by recreationalists. The Department of Conservation or other authorities should be contacted for the latest information on tracks and huts.

• Not all aerial wires, cableways and obstructions that could be hazardous to aircraft are held in the data.

• Contours and spot elevations in forest and snow areas may be less accurate.

• Not all pipelines including both underground and above ground are held in the data or shown on the printed maps. For the latest information please contact the utility and infrastructure agencies

• Permits may be required to visit some sensitive and special islands and areas. Contact the Department of Conservation to see if you need to apply for a permit.

A subset of NationalMap consisting of a combination of historic sites, monuments, and fortification extracted from the LINZ web portal.

The Topographic historic layer consists of the places where there has been historic activity, where there is a historic object, or the structures erected as a memorial can be found in this layer. Also contained are a combination of European fortifications and Maori defensive earthworks extracted from the LINZ web portal. The fortification data consists of: - Redoubt points: European fortification of the New Zealand Wars- Pa points: Defensive earthworks constructed by Maori at any time between the fifteenth and nineteenth centuries which were still visible as a topographical object at the time the first edition of the map was published.

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham and New Zealand's offshore islands, at 1:50,000 scale. Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

Context

Maungataketake (Ellett’s Mountain) was a volcanic cone on the shore of the Manukau Harbour, Mangere, New Zealand. In the second half of the twentieth century the mountain was quarried away. Maungataketake was a terraced Māori Pā, and archaeological excavations (only now in the process of being published) were undertaken there between 1972 and 1975, and in 1982, prior to its complete destruction. There is aerial imagery of the mountain available that depicts the mountain prior to quarrying. With these data a 3D model of the site was made using photogrammetry, which was also used to create a digital surface model (DSM) and contour map of the mountain. The resulting data is provided here and is aimed for further geospatial applications. In addition, the resolution of the provided DSM has analogues for the wider region and therefore could be incorporated to represent the landscape pre-destruction. Further to this a representation of the 3D model may be found on SketchFab.

Method

The photogrammetry model was created in Agisoft Metashape version 1.5.4. Ten aerial images were used of Maungataketake and the surrounding area, captured on 19th August 1960. These images were downloaded from http://retrolens.co.nz and are licensed by LINZ CC-BY 3.0. The model was aligned and the spare point cloud filtered by gradual selection with the following parameters: projection error = 0.2; reconstruction uncertainty = 10; projection accuracy = 2.5. The dense cloud was processed with depth maps of ultra high quality and aggressive filtering. The resulting points cloud was edited to remove outlying points and processed into a 3D model.

The resulting 3D model was manually edited to remove faces representing trees on Maungataketake only, but not the surrounding area. This was done as to obtain representative surface contours of the mountain. The model was georeferenced by the identification of points on the landscape present on the 1960 composite image and contemporary satellite imagery. A 0.5 m DSM and contours at 1 m resolution were calculated of Maungataketake.

Contents of dataset

A geodatabase with:

Control points used for georectification

1 m contours without elevation of Maungataketake

1 m contours with elevation of Maungataketake

0.5 m composite aerial image

0.5 m DSM of area covering control points

0.5 m DSM of Maungataketake

Aerial photographs Crown_583-1924_22-26, Crown_583_1925_22-26

Licence for aerial photographs from http://retrolens.co.nz

Attributes of aerial photographs

Slope data layer used in the creation of Land Environments of New Zealand (LENZ) classification. The classification layers have been made publicly available by the Ministry for the Environment (see https://data.mfe.govt.nz/layers/?q=LENZ for to access these layers).

This slope data layer is measured in degrees and was created from a 25-metre digital elevation model (DEM) fitted to 20-m digital contour data derived from New Zealand's NZMS 260 map series using in-house software developed at Landcare Research.

All contours were originally derived photogrammetrically from stereo photographs for final map reproduction at a scale of 1: 50 000. Additional intermediate contours and spot heights were used in generating the DEM where available, while coastlines and shorelines (for lakes greater than 10 ha in extent) were used to constrain the DEM surface around water bodies. The linear interpolation method used to create the DEM threads contours through the cells before interpolation so that any cell intersected by a contour will be given the elevation value of that contour, leading to a high percentage of cells with elevations that are multiples of 20 or 10 in steep areas.

Additional details are defined in the attached LENZ Technical Guide.

The Ant50 map series provides topographic mapping within the Ross Dependency, Antarctica

Digital images of the maps are also publicly available from http://www.linz.govt.nz/topography/topo-maps/antarctic-topo50-map-series

Georeferenced raster digital images are provided at a resolution of 300 DPI. Georeferencing allows adjacent maps to be accurately and automatically aligned within GIS systems.

For more information, and a description of the georeferencing keys: http://www.linz.govt.nz/topography/topo-maps/topo50/digital-images

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: http://apps.linz.govt.nz/topo-data-dictionary/index.aspx?page=class-contour

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham and New Zealand's offshore Islands, at 1:50,000 scale.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

High definition topographical map of the Bay of Plenty Region. Suitable to print to A0 size.

This web map can also be accessed via the LINZ Storymap about NZ Key Datasets for Resilience and Climate Change https://storymaps.arcgis.com/stories/b4dd46f15cea4234a098b4c8caae5b3d 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, 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 recut 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 minimized by processing contiguous areas (such as the whole of the North Island) together, which wasn't possible when the REC was first created. Major updates include the revision of catchment land use information, by overlaying with 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 as a zip file and used directly in ArcMap. Alternatively, the layers can be extracted as shape files. The three REC2 based layers contained within this web map consist of the following (metadata is contained in the Layers section below).NZ Large Catchments, are basically the local watersheds of the REC2V5 dissolved into large sea draining catchments.River Environment Classification REC2 V5 (as National and local rivers) NZ Rivers and Names is a cut down version of the REC2V5 with river and waterway names added where available.

Field Type Descriptions for all REC2 associated feature layers within this webmap.RivName The names for any waterway where available taken from original topo data ( only for the NZ Large Catchments and NZ River and Names layers)

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 (supercedes nzreach in REC1).

Lengthdown Real The 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 network.

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). sinuosity Real Actual distance divided by the straight line distance giving the degree of curvature of the stream nzreach_re Integer The 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_leng Real The length of the reach (vector) as calculated by ArcGIS. 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

NIWA acknowledges funding from the MBIE SSIF towards the preparation of REC v2.5 River Environment Classification._Item Page Created: 2021-07-09 05:37 Item Page Last Modified: 2025-04-05 18:53Owner: steinmetzt_NIWANZ River Names (REC2)Item id: 502212e71bce4c029de8a82cd5bc6302NZ Regional Rivers (REC2)Item id: 502212e71bce4c029de8a82cd5bc6302NZ National Rivers (REC2)Item id: 3a4b6cc2c1c74fbb8ddbe25df28e410cNZ Large River CatchmentsItem id: 28d23ad94c2a4846b7634f4cdbba178f

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

Although captured and presented at 1:25,000 this layer, for all intents and purposes, forms part of the Topo50 map series.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

In addition to contour lines, relief shading helps visualise the terrain. Hills and valleys are shaded as if they were illuminated from the north-west.

Relief layers were generated for each sheet, and specifically for use in the Topo50 map series. There may be subtle differences in the relief shading of adjacent map sheets. Where no contour information exists, relief shading has not been produced.

The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham Islands, offshore islands, and offshore dependancies at 1:50,000 (some of the islands at 1:25,000) scale. For some small islands the printed map scale is 1:25,000. Although presented at 1:25,000 this layer, for all intents and purposes, forms part of the Topo50 map series.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-contour.html

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Any standing body of fresh inland water.

Data Dictionary for lake_poly: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-lake_poly.html

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham and New Zealand's offshore islands, at 1:50,000 scale.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50

APIs and web services

This dataset is available via ArcGIS Online and ArcGIS REST services, as well as our standard APIs. LDS APIs and OGC web services ArcGIS Online map services

A place where some historic activity has been conducted, or where some historic object is located.

Data Dictionary for historic_site_pnt: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-historic_site_pnt.html

This layer is a component of the Topo50 map series. The Topo50 map series provides topographic mapping for the New Zealand mainland, Chatham and New Zealand's offshore Islands, at 1:50,000 scale.

Further information on Topo50: http://www.linz.govt.nz/topography/topo-maps/topo50