NZ Coastlines and Islands Polygons (Topo 1:250k)

07 Feb 2018

This dataset was last updated on LINZ Data Service on 07 Feb 2018.

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

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.

Category Topographic > NZ Topo 250 Data > Hydrography
Tags New Zealand
Regions New Zealand
Metadata ISO 19115/19139, Dublin Core
Technical Details
Layer ID 51559
Data type Vector multipolygon
Feature count 1698
Attributes grp_ascii, grp_name, name_ascii, macronated, name, grp_macron
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), Atom Feed
Added 30 Sep 2012
Last updated 07 Feb 2018
Revisions 20 - Browse all revisions
Current revision Imported on Feb. 7, 2018 from Shapefile in NZGD2000. 1 geometry modified to be OGC compliant. Changelog.
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