Addressing is the specific identification of a fixed location (for example, a plot of land, building, part of a building, way of access or other construction) which is represented by a structured arrangement of place names. It may be further detailed with the inclusion of other valuable attributes including geocodes.

Positioning is NSW’s authoritative, reliable, high-accuracy spatial referencing system. The Positioning theme includes the coordinates and their uncertainty of all location-based data promulgated from, or related to, the Geocentric Datum of Australia (GDA94) and the Australian Height Datum (AHD71).

Imagery is the product created from the use of airborne, space borne or terrestrial sensors. These technologies image the surface of the Earth to allow for the visualisation of land surface features. Imagery includes data sourced from satellite, aircraft and vehicle mounted sensors. These technologies have a range of capabilities that includes but is not limited to, the ability to record multispectral and hyperspectral data and produce products such as orthorectified mosaics and stereo-viewable imagery.

Road segment represents the centreline of a section of road having common attributes and terminating at its physical end or to an intersection with another road at the same grade or level. It is an open way for the passage of vehicles, person or animals on land. This data is held and maintained within the NSW Digital Topographic Database (DTDB) and includes key attributes such as road name, type, surface, lane count and on-type (e.g. onground, onbridge, intunnel etc).

Contours are virtual imaginary lines on the ground, joining points of an equal elevation in relation to the Australian Height Datum (AHD). A contour can be a standard contour, depression contour or an ancillary contour. It is a part of the NSW Digital Topographic Database (DTDB).

NYSNet is a spatial reference network of continuously operating Global Positioning System (GPS) reference stations (CORS) throughout New York State that can be used for differential GPS applications. Depending on equipment and procedures, this network can provide users the ability to achieve centimeter positioning for surveying applications or sub-meter positioning for GIS mapping applications. Position information from this reference network can be utilized by using static data in post processing or by using the real time network (RTN).

Spatial Service’s standard imagery capture program covers the entire state of NSW. Standard coverage imagery is captured and processed at a 50cm Ground Sample Distance (GSD) and is available as either 5km x 5km image modules or mosaicked to the extent of a 1:100,000 mapsheet.

Spot Height is a point feature class representing individual points on the earth’s surface, the elevation of which has been related to a datum by ground or photogrammetric survey. It is a part of the NSW Digital Topographic Database (DTDB).

Airport is a facility, either on land or water, where aircraft can take off or land. It usually consists of hard-surfaced landing strips, a control tower, hangars, and accommodations for passengers and cargo. This data is held and maintained within the NSW Digital Topographic Database (DTDB) and includes key attributes such as airport name.

Foundation spatial data is defined as “the authoritative geographic information that underpins, or can add significant value to, any other information. It supports evidence-based decisions across government, industry and the community”1. Criteria has been developed to determine non-foundation from foundation. To be classified as foundation, the spatial data must contain one or more of the following characteristics to be deemed ‘foundation’: • be geospatial • essential for public safety and wellbeing • critical for a national and state or government function • contribute significantly to economic, social and environmental sustainability. NSW has adopted the ten data themes identified by ANZLIC. These are: 1. Administrative Boundaries 2. Land Parcel and Property 3. Geocoded Addressing 4. Transport 5. Positioning 6. Place Names 7. Elevation and Depth 8. Imagery 9. Water 10. Land Cover.