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  • The Bluff 1955 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Bluff 1955 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the Bluff 1955 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • The Stewart Island 1977 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Stewart Island 1977 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the Stewart Island 1977 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • The One Tree Point 1964 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the One Tree Point 1964 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the One Tree Point 1964 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • In June 2014 the Authoritative Streets and Places (ASP) database was decommissioned, and at the same time a new Landonline SUFI was created for each unique road name / locality combination in the Landonline Road Name table. Prior to this change the Landonline Road Name table held the ASP Street SUFI in its Locality field, and a join was made between these two tables in order to populate the Landonline Locality field with the ASP locality name prior to release on the LDS. Following this change the Locality field in the Landonline Road Name table was updated to show the locality name as held in the ASP Street table. This table shows the mapping between the new Landonline Road Name SUFI and the old ASP Street SUFI. The Topo50 Road Centrelines data previously included the name_id attribute (equivalent to asp_sufi), which has now been changed to the new rna_sufi attribute (equivalent to landonline_sufi).

  • This layer has been provided to identify the coverage of digitised and released historic aerial photos for Mainland NZ flown on behalf of the Crown between 1936 and 2005. The layer shows the extents of the aerial surveys released by LINZ under open license. The [NZ Aerial Photo Footprints, Mainland NZ, (1936-2005) polygons](https://data.linz.govt.nz/layer/1002-nz-aerial-photo-footprints-mainland-nz-1936-2005-polygons/) layer shows the extent of each photograph in the survey and provide metadata for the individual photos. See: [https://www.flickr.com/photos/135346658@N08/albums](https://www.flickr.com/photos/135346658@N08/albums) for access to the photos. **The photos are not downloadable from the LINZ Data Service.** Please note that the process to make the scanned photos openly available is still under development, and the distribution mechanism may change. These first ten surveys are made available to showcase the content of the archive and what users can expect access to. Once we have established the long-term distribution mechanism LINZ’s goal is to periodically add surveys to this layer as they become available. We expect this distribution mechanism will be established near the end of 2015 and the next release of surveys will occur at that time. See: [http://www.linz.govt.nz/about-linz/what-were-doing/projects/crown-historic-aerial-photo-archive-scanning-project](http://www.linz.govt.nz/about-linz/what-were-doing/projects/crown-historic-aerial-photo-archive-scanning-project) for information about the Crown historic aerial photo archive digitisation project. The original data used to create this layer was compiled prior to 2000 and it is possible that some errors exist in the data fields. If you are aware of any inaccuracies, please contact LINZ: info@linz.govt.nz or +64 4 4600110.

  • The Napier 1962 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Napier 1962 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the Napier 1962 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • The Stewart Island 1977 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Stewart Island 1977 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the Stewart Island 1977 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • The Dunedin-Bluff 1960 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Dunedin-Bluff 1960 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). The conversion value is represented by the attribute “O”, in metres. This conversion and NZVD2016 are formally defined in the LINZ standard [LINZS25009](http://www.linz.govt.nz/regulatory/25009). The height conversion grid models the difference between the Dunedin-Bluff 1960 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval). More information on converting heights between vertical datums can be found [on the LINZ website](http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums).

  • **Note:** This layer has been provided to enable potential users to identify the coverage of photography for Mainland NZ flown on behalf of the Crown between 1936 and 2005. The layer shows the extent of each photograph taken. The [NZ Aerial Survey Footprints, Mainland NZ, (1936-2005) polygons layer](https://data.linz.govt.nz/layer/1000-nz-aerial-survey-footprints-mainland-nz-1936-2005-polygons) shows the extent of each survey undertaken, and the [Digitised Historic Aerial Surveys Available for Download (1936-2005)](https://data.linz.govt.nz/layer/2418) layer shows the extents of the surveys digitised and released by LINZ under open license. See [http://www.linz.govt.nz/about-linz/what-were-doing/projects/crown-historic-aerial-photo-archive-scanning-project](http://www.linz.govt.nz/about-linz/what-were-doing/projects/crown-historic-aerial-photo-archive-scanning-project) for direction on how to access the digitised photos. The photos are not downloadable from the LINZ Data Service. The Crown Aerial Film Negative Collection is managed for LINZ by Opus International.You can are order images from the Collection from Opus International in a number of formats, including: - contact prints - enlargements - digital files - precision scans for photogrammetric production - orthophotos You will need to tell Opus International the survey, run and photo number (values in the ‘SURVEY’ 'RUN' and 'PHOTO_NO' attributes) covering your area of interest. Opus International will be able to provide information about the cost of providing images in the various formats. Contact them at: photosales@opus.co.nz or 0800 680 690 There are also a large number of images which previously belonged to New Zealand Aerial Mapping and which are now are available for public use. The extents of these may be added to the LDS in future. You can order these images by contacting Opus International.

  • Note: LINZ and Opus International have recently agreed a contract for the maintenance of the Crown aerial imagery archive, following the liquidation of New Zealand Aerial Mapping in September 2014. The following Information on product sales has been updated to reflect this. This layer has been provided to enable potential users to identify the coverage of photography for Mainland NZ flown on behalf of the Crown between 1936 and 2005. Areas flown outside of Mainland NZ will be added later. The original data used to create this layer was compiled prior to 2000 and it is possible that some errors exist in the data fields. If you are aware of any inaccuracies, please contact LINZ: info@linz.govt.nz or +64 4 4600110. The layer shows the extent of each aerial survey undertaken. The 'NZ Aerial Photo Footprints 1936-2005 poly' layer shows the extent of each photograph in the survey. The Collection exists as photographic negatives (most are not in digital form) so the images are not downloadable from the LDS. The Crown Aerial Film Negative Collection is managed for LINZ by Opus International. You can are order images from the Collection from Opus International in a number of formats, including: - contact prints - enlargements - digital files - precision scans for photogrammetric production - orthophotos You will need to tell Opus NZ the survey number (the value in the ‘SURVEY’ attribute) covering your area of interest. Opus NZ will be able to provide information about the cost of providing images in the various formats. Contact them at: photosales@opus.co.nz or 0800 680 690 There are a small number of images held in the Collection that have not been referenced in the LDS layers due to incomplete metadata. LINZ is currently investigating ways this can be remedied. Opus International will be able to let you know if additional photographs are available in your area of interest. There are also a large number of images which previously belonged to New Zealand Aerial Mapping and which are now are available for public use. The extents of these may be added to the LDS in future. You can order these images by contacting Opus International.