Hydrography Data

The line forming the boundary between the land and sea, defined by mean high water.

Data Dictionary for coastline: docs.topo.linz.govt.nz/data-dictionary/tdd-class-c...

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.

Disturbed ice area edge; designated where the presence of seracs, criss-crossed crevasses and skauk are in such numerous quantities that is is difficult to separate one ice formation from another.

Data Dictionary for distice_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-d...

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.

Fast ice; any sea ice that forms along and remains attached to the coast or that forms between grounded icebergs or is attached to the bottom in shallow water.

Data Dictionary for fastice_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-f...

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.

Glacial lake boundary; a lake fed by meltwater, or forming in glacier ice because of differential melting, or one confined by a morainal dam, or held in a bedrock basin produced by glacial erosion.

Data Dictionary for glacial_lake_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-g...

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 region of permanent ice

Data Dictionary for ice_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-i...

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.

Large area of permanent sea ice.

Data Dictionary for ice_shelf_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-i...

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.

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: docs.topo.linz.govt.nz/data-dictionary/tdd-class-i...

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 large, massive piece of floating glacier ice of any shape, detached from the front of a glacier into a body of water; extends more than 5m above sea level.

Data Dictionary for iceberg_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-i...

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.

Area of dry or relatively dry land surrounded by water or low wetland

Data Dictionary for island_poly: docs.topo.linz.govt.nz/data-dictionary/tdd-class-i...

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: docs.topo.linz.govt.nz/data-dictionary/tdd-class-l...

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.