Ice stream; a current of ice in an ice sheet or ice cap that flows more rapidly than the surrounding ice,usually flowing to the ocean or to an ice shelf and not constrained by exposed rock. Data Dictionary for ice_stream_cl: http://apps.linz.govt.nz/topo-data-dictionary/index.aspx?page=class-ice_stream_cl 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.

A naturally formed, subterranean open area or chamber. Data Dictionary for cave_pnt: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-cave_pnt.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 formed all weather route suitable for the passage of any vehicle. Data Dictionary for road_cl: http://apps.linz.govt.nz/topo-data-dictionary/index.aspx?page=class-road_cl 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.

Polygon for each Topo50 map sheet in the Ross Dependency, Antarctic holding extents of each sheet, it's sheet code, name, edition, and revision statement. This is the same information that is printed on each ANTTopo50 map.

Any standing body of fresh inland water. Data Dictionary for lake_poly: http://apps.linz.govt.nz/topo-data-dictionary/index.aspx?page=class-lake_poly 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.

The line forming the boundary between the land and sea, defined by mean high water. Data Dictionary for coastline: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-coastline.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.

A high, steep or overhanging face or rock. Can be rock. Data Dictionary for cliff_edge: http://apps.linz.govt.nz/topo-data-dictionary/index.aspx?page=class-cliff_edge 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.

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

A structure used for the storage of fluids. Data Dictionary for tank_poly: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-tank_poly.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.

Descriptive text; object used to hold text. Data Dictionary for descriptive_text: https://docs.topo.linz.govt.nz/data-dictionary/tdd-class-descriptive_text.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.