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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This provides a polygon coastline and islands layer which is based on the Topo50</SPAN></P><P><SPAN>products. It is a combination of the following layers:</SPAN></P><P><SPAN /></P><P><SPAN>- [NZ Coastlines (Topo</SPAN></P><P><SPAN>1:50k)](http://data.linz.govt.nz/layer/258-nz-coastlines-topo-150k/)</SPAN></P><P><SPAN>- [NZ Island Polygons (Topo</SPAN></P><P><SPAN>1:50k)](http://data.linz.govt.nz/layer/288-nz-island-polygons-topo-150k/)</SPAN></P><P><SPAN>- [NZ Auckland Is Island Polygons (Topo,</SPAN></P><P><SPAN>1:50k)](http://data.linz.govt.nz/layer/959-nz-auckland-is-island-polygons-topo-150k/)</SPAN></P><P><SPAN>- [NZ Campbell Is / Motu Ihupuku Island Polygons (Topo,</SPAN></P><P><SPAN>1:50k)](http://data.linz.govt.nz/layer/932-nz-campbell-is-motu-ihupuku-island-polygons-topo-150k/)</SPAN></P><P><SPAN>- [NZ Antipodes Is Island Polygons (Topo,</SPAN></P><P><SPAN>1:25k)](http://data.linz.govt.nz/layer/978-nz-antipodes-is-island-polygons-topo-125k/)</SPAN></P><P><SPAN>- [NZ Kermadec Is Island Polygons (Topo,</SPAN></P><P><SPAN>1:25k)](http://data.linz.govt.nz/layer/908-nz-kermadec-is-island-polygons-topo-125k/)</SPAN></P><P><SPAN>- [NZ Bounty Is Island Polygons (Topo,</SPAN></P><P><SPAN>1:25k)](http://data.linz.govt.nz/layer/992-nz-bounty-is-island-polygons-topo-125k/)</SPAN></P><P><SPAN>- [NZ Snares Is / Tini Heke Island Polygons (Topo,</SPAN></P><P><SPAN>1:25k)](http://data.linz.govt.nz/layer/893-nz-snares-is-tini-heke-island-polygons-topo-125k/)</SPAN></P><P><SPAN>- [NZ Chatham Is island polygons (Topo,</SPAN></P><P><SPAN>1:50k)](http://data.linz.govt.nz/layer/86-nz-chatham-is-island-polygons-topo-150k/)</SPAN></P><P><SPAN /></P><P><SPAN>Islands from the NZ Island Polygons layer that lie within the NZ Coastline and</SPAN></P><P><SPAN>Chatham Islands areas (i.e. islands in lakes, rivers and estuaries) have been</SPAN></P><P><SPAN>removed.</SPAN></P><P><SPAN /></P><P><SPAN>The GIS workflow to create the layer is: </SPAN></P><P><SPAN /></P><P><SPAN>1. NZ Coastlines were converted from a polyline to a polygon using a polyline to</SPAN></P><P><SPAN>polygon tool.</SPAN></P><P><SPAN>2. The resulting coastal polygon was then used as an input into an erase tool</SPAN></P><P><SPAN>and run against the NZ Island Polygon layer to remove all islands lying within</SPAN></P><P><SPAN>the NZ Mainland and Stewart Island. </SPAN></P><P><SPAN>3. This was then merged with the NZ Chatham Is island polygons (Topo, 1:50k)</SPAN></P><P><SPAN>that have had the islands within the main island polygon removed, NZ Auckland Is</SPAN></P><P><SPAN>Island Polygons (Topo, 1:50k), NZ Campbell Is / Motu Ihupuku Island, NZ</SPAN></P><P><SPAN>Antipodes Is Island Polygons (Topo, 1:25k), NZ Kermadec Is Island Polygons</SPAN></P><P><SPAN>(Topo, 1:25k), NZ Bounty Is Island Polygons (Topo, 1:25k) and NZ Snares Is /</SPAN></P><P><SPAN>Tini Heke Island Polygons (Topo, 1:25k) layers using a merge tool. </SPAN></P><P><SPAN>4. Lake Onoke from the NZ Lake Polygons (Topo 1:50k) layer and Te Whanga Lagoon</SPAN></P><P><SPAN>from the NZ Chatham Is lagoon polygons (Topo, 1:50k) layer were then erased from</SPAN></P><P><SPAN>the resultant polygon layer to include these two water bodies in the coastline</SPAN></P><P><SPAN>definition.</SPAN></P></DIV></DIV></DIV> |