Topo50 Antarctic Data

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.

A crack or fissure in a glacier resulting from stress; may be 20m wide and 45 metres deep and several hundred metres long.

Data Dictionary for crevasse_cl: 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.

An area set aside for the landing of helicopters

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

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.

Descriptive text; object used to hold text.

Data Dictionary for descriptive_text: 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.

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.

Ice cliff edge; any vertical wall of ice eg. a very steep surface bounding a glacier or mass of shelf ice; the cliffed edge of an ice sheet or glacier on a land surface or the cliffs at the seaward floating edge of a glacier or ice shelf.

Data Dictionary for ice_cliff_edge: 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.

Geographic name holds the proper noun of certain objects within the Topo databases. Geographic_name does not apply to roads, railway lines, or descriptive text - eg 'Brunner Mine' would be a Geographic_name but 'mine disused' is held in the descriptive_text feature

Data Dictionary for geographic_name: 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.

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.

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: 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.