Data - Page 6

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

A Reduction Run is a mathematical process of reducing raw observations to generate a set of reduced observations (in the case of GPS observations, this results in the generation of baselines). The Reduction Run entity contains information about the filtering and quality measures applied in relation to the reduction method used.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

A Datum is a complete system for enabling Coordinates to be assigned to Nodes. A datum is prescribed by the appropriate authority from which it derives its validity. All Coordinates will be in terms of a Datum. A Datum also provides a spatial standard for the alignment of Reduced Observations via a Datum Calibration. Most Reduced Observations are Datum dependent but there are specific Reduced Observation types which are Datum independent. The Datum entity contains information about the official geodetic Datum used in Land Information NZ databases and other important Datum’s used to spatially reference source data (e.g.. Reduced Observations) or output data or products (e.g.. Coordinates, Digital Cadastral Database, topographic maps, hydrographic charts, etc). The Datum entity includes objects which, strictly, are reference frames rather than datum’s but the distinction is a fine technical point which is of no great consequence. The Datum entity includes vertical reference surfaces such as leveling datum’s, various tidal surfaces including Mean Sea Level, the geoid, datum ellipsoids, etc. For a Datum to maintain accuracy over a significant area it must be geodetic. Examples of non-geodetic datum’s are the Old Cadastral Datums. These do not account for the curvature of the earth and therefore can only maintain accuracy over a limited part of the earth's surface.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

This table defines all of the different types of observations. Observations are can be split into two types raw or reduced. For raw observations the following subtypes exist: GPS raw data, theodolite pointing, EDM slope observation, level foresight/backsight, meteorological readings, etc. For Reduced Observations the following subtypes exist: GPS baseline, GPS multi-station set, GPS point position, Doppler point position, theodolite direction etc.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

An Adjustment is a mathematical process of generating corrections to Reduced Observations and Coordinates to generate a consistent set of adjusted Coordinates and adjusted Reduced Observations. The adjusted Reduced Observations are able to be re-generated from the adjusted Coordinates and are therefore not retained. Inputs are, Reduced Observations, Observation Accuracy, Coordinates and constraints which are defined by Adjustment Method and Adjustment Coefficients. The primary outputs are adjusted Coordinates, Coordinate Accuracy (again in the form of a VCV matrix) and identification of suspect Reduced Observations.The Adjustment entity contains information about the network adjustment process including, the type of adjustment model used, constraints applied, source, etc.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

Reduction Method contains information of the type of software and procedures used to generate Reduced Observations from Raw Measurements or other reduced observations.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

Adjustment Method contains information concerning the type of software and procedures used to adjust the parcel fabric.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

This table contains all of the elements required to define an observation type.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

An associate table that resolves the many-to - many relationships between Datum and Coordinate Type. Coordinates are expressed in terms of a Coordinate System. For example, Coordinates may be expressed as latitude and longitude (a Coordinate Type) on New Zealand Geodetic Datum 1949 (a Datum). Transformations operate between Coordinate Systems. For example, a transformation may relate Cartesian Coordinates on NZGD49 to Cartesian Coordinates on WGS84.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

This table is used to override the default values for an adjustment run.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.

Please read: This table is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.

Adjustment Coefficient is a set of control parameters used by an Adjustment Method in the Generate Coordinate/Adjustment process.

Please refer to the LDS Full Landonline Data Dictionary and Models for detailed metadata about this table.