Coastline represents the contact between a body of water and the land. It is a line feature class of the NSW Digital Topographic Database ( DTDB), within the Hydrography theme. Particularly, it identifies the line delineating the interface between land, internal waters and the "Territorial Sea" as defined by the Seas and Submerged Lands Act - No. 161 of 1973. The coastline defining Mean High Water Mark (MHWM) does not include MHWM within estuaries.
There is no overall accuracy reported in the database, however accuracy of the individual feature instances of each feature class can be found in the database tables. The currency of the feature instances in this dataset can be found in “feature reliability date” or “attribute reliability date” attributes. All feature instances in this class are attributed with a planimetric accuracy value. It is expected that the 90% of well-defined points with the same planimetric accuracy are within 0.5mm of that map scale. Depending on the capture source, capture method, digital update and control point upgrade, every feature instance reported has a positional accuracy within the range of 1m - 100m. For detailed definitions on all feature classes and attributes, refer to the DTDB Data Dictionary. This dataset is available for download through the clip & Ship application in LPI’s Online Shop. The download link is provided in the distribution section of this metadata statement. Some of the production related attributes have been removed from this dataset so as to simplify the data schema and improve data delivery performance. Based on the area of interest this feature class may or may not be present.