Topographic Layers

A relatively permanent walled and roofed construction.

Data Dictionary for building_poly: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

Although captured and presented at 1:25,000 this layer, for all intents and purposes, forms part of the Topo50 map series.

Further information on Topo50:
www.linz.govt.nz/topography/topo-maps/topo50

Coastal rocks; rocks between high and low tide

Data Dictionary for rock_poly: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

Although captured and presented at 1:25,000 this layer, for all intents and purposes, forms part of the Topo50 map series.

Further information on Topo50:
www.linz.govt.nz/topography/topo-maps/topo50

This provides a polygon coastline and islands layer which is based on the Topo50 products. It is a combination of the following layers:

• NZ Coastlines (Topo 1:50k)
  
• NZ Island Polygons (Topo 1:50k)
  
• NZ Auckland Is Island Polygons (Topo, 1:50k)
  
• NZ Campbell Is / Motu Ihupuku Island Polygons (Topo, 1:50k)
  
• NZ Antipodes Is Island Polygons (Topo, 1:25k)
  
• NZ Kermadec Is Island Polygons (Topo, 1:25k)
  
• NZ Bounty Is Island Polygons (Topo, 1:25k)
  
• NZ Snares Is / Tini Heke Island Polygons (Topo, 1:25k)
  
• NZ Chatham Is island polygons (Topo, 1:50k)
  

Islands from the NZ Island Polygons layer that lie within the NZ Coastline and Chatham Islands areas (i.e. islands in lakes, rivers and estuaries) have been removed.

The GIS workflow to create the layer is:

1. NZ Coastlines were converted from a polyline to a polygon using a polyline to polygon tool.
   
2. The resulting coastal polygon was then used as an input into an erase tool and run against the NZ Island Polygon layer to remove all islands lying within the NZ Mainland and Stewart Island.
   
3. This was then merged with the NZ Chatham Is island polygons (Topo, 1:50k) that have had the islands within the main island polygon removed, NZ Auckland Is Island Polygons (Topo, 1:50k), NZ Campbell Is / Motu Ihupuku Island, NZ Antipodes Is Island Polygons (Topo, 1:25k), NZ Kermadec Is Island Polygons (Topo, 1:25k), NZ Bounty Is Island Polygons (Topo, 1:25k) and NZ Snares Is / Tini Heke Island Polygons (Topo, 1:25k) layers using a merge tool.
   
4. Lake Onoke from the NZ Lake Polygons (Topo 1:50k) layer and Te Whanga Lagoon from the NZ Chatham Is lagoon polygons (Topo, 1:50k) layer were then erased from the resultant polygon layer to include these two water bodies in the coastline definition.
   

For more detailed description of each layer refer to the layer urls above.

This provides a polygon coastline and islands layer which is based on the Topo250 products. It is a combination of the following layers:

• NZ Mainland coastlines (Topo, 1:250k)
  
• NZ Mainland island polygons (Topo, 1:250k)
  
• NZ Chatham Is island polygons (Topo, 1:250k)
  

Islands from the NZ Island Polygons layer that lie within the NZ Coastline and Chatham Islands areas (i.e. islands in lakes, rivers and estuaries) have been removed.

The GIS workflow to create the layer is:

1. NZ Coastlines were converted from a polyline to a polygon using a polyline to polygon tool.
   
2. The resulting coastal polygon was then used as an input into an erase tool and run against the NZ Island Polygon layer to remove all islands lying within the NZ Mainland and Stewart Island.
   
3. This was then merged with the NZ Chatham Is island polygons (Topo, 1:250k) that have had the islands within the main island polygon removed using a merge tool.
   
4. Lake Onoke from the NZ Mainland lake polygons (Topo, 1:250k) layer and Te Whanga Lagoon from the NZ Chatham Is lagoon polygons (Topo, 1:250k) layer were then erased from the resultant polygon layer to include these two water bodies in the coastline definition.
   

For more detailed description of each layer refer to the layer urls above.

This provides a polygon coastline and islands layer which is based on the Topo500 products. It is a combination of the following layers:

• NZ Coastlines (Topo, 1:500k)
  
• NZ Island Polygons (Topo, 1:500k)
  

Islands from the NZ Island Polygons layer that lie within the NZ Coastline area (i.e. islands in lakes, rivers and estuaries) have been removed.

The GIS workflow to create the layer is:

1. NZ Coastlines were converted from a polyline to a polygon using a polyline to polygon tool.
   
2. The resulting coastal polygon was then used as an input into an erase tool and run against the NZ Island Polygon layer to remove all islands lying within the NZ Mainland and Stewart Island.
   

For more detailed description of each layer refer to the layer urls above.

The Topo50 map series provides topographic mapping for the New Zealand mainland, the Chatham Islands, and offshore islands at 1:50,000 scale.

Along with the paper-based Topo50 map series, digital images of the maps are also publicly available.

Georeferenced raster digital images are provided at a resolution of 300 DPI. Georeferencing allows adjacent maps to be accurately and automatically aligned within GIS systems.

For more information, and a description of the georeferencing keys:
www.linz.govt.nz/topography/topo-maps/topo50/digit...

Please be aware of the following:

• The existence of a road or track does not necessarily indicate public right of access.
  

• Closed tracks are defined as being no longer maintained or passable and should not be used by recreationalists. The Department of Conservation or other authorities should be contacted for the latest information on tracks and huts.
  

• Not all aerial wires, cableways and obstructions that could be hazardous to aircraft are held in the data.
  

• Contours and spot elevations in forest and snow areas may be less accurate.
  

• Not all pipelines including both underground and above ground are held in the data or shown on the printed maps. For the latest information please contact the utility and infrastructure agencies
  

• Permits may be required to visit some sensitive and special islands and areas. Contact the Department of Conservation to see if you need to apply for a permit.

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.

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: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

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: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

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.

Meltwater_stream; a flow of water that is supplied by melting glacier ice; a "glacial stream" often grayish-white in colour because of the "rock flour"resulting from glacial erosion.

Data Dictionary for melt_stream_cl: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

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.