eff147c6-6135-4ccf-aaa2-5599e41845f5 urn:uuid en UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-23T06:16:17 creation ISO 19115 2016 Christmas Island Coastline - 2011update eff147c6-6135-4ccf-aaa2-5599e41845f5 A coastline polygon was created from the 2011 digital elevation model (DEM) by Geoscience Australia using ArcMap. When compared to the 2010 coastline (1:30,000 data), and the 2011 orthophotography, the 2011 coastline follows the actual coast more accurately. To make the coastline, all the DEM pixels were reclassified using the ‘reclassify’ tool to give the value of zero, then the coastline was generated using the ‘raster to polygon tool’. Notes on other coast outlines: Cadastre coastline: The coastline displayed as part of the cadastre is derived from the 1999 coastline, as well as some sections which have been manually surveyed. 1999 coastline: A digital elevation model of Christmas Island was created in 1999 from which a coastline was created. This is presumed to be the basis of the 1:25,000 coastline and the original 1:30,000 coastline. Disclaimer {"type":"MultiPolygon","coordinates":[[[[105.31950049102308,-10.7817229847314],[105.31950049102308,-10.202001575218606],[105.94209585338832,-10.202001575218606],[105.94209585338832,-10.7817229847314],[105.31950049102308,-10.7817229847314]]]]} 105.31950049102308 105.94209585338832 -10.7817229847314 -10.202001575218606 Christmas IOT coast coastline shore shoreline Christmas Island Coastline - 2011update documentDigital Coastline polygon created from the 2011 digital elevation model (DEM) SHP