This layer contains all individual vector layers for the Ant50 map series available through the LINZ Data Service. Ant50 is the topographic mapping carried out by LINZ within the Ross Dependency, Antarctica.
This grouping of NZ Ross Dependency Topo50 Data layers will allow you to quickly view and download this collection of related layers.
See the [Topographic Data Dictionary](https://docs.topo.linz.govt.nz/data-dictionary/) for detailed information about each layer, and our background information on the [Antarctic Topo50 map series](http://www.linz.govt.nz/land/maps/linz-topographic-maps/topo50-maps/antarctic-topo50-map-series) for more information about the data, including update history and release notes.
Since 1923, New Zealand has maintained its right of sovereignty over the Ross Dependency, an area defined as all islands and territories south of 60 degrees south latitude and between the 160th degree of east longitude and the 150th degree of west longitude LINZ, in conjunction with the USGS, carried out mapping of the Dry Valleys area and Ross Island in the 1980s and 1990s In 2007, LINZ expanded the mapping to include the Darwin/Hatherton Glacier region of Antarctica. The purpose of this is to support science taking place in the region as part of the Latitudinal Gradient Project. The data provided is based on ALOS PRISM satellite imagery taken during the 2006/07 season and is supplied in the Darwin Glacier Lambert Conformal Conic 2000 projection. The survey work for this data was undertaken between 2007 and 2010.