capturespecificationvalue

This code list is used in association with the Capture Specification attribute which is present within multiple OS NGD feature types across various OS NGD themes. The code list indicates the expected positional accuracy of the base survey and provides information on the guidelines applied regarding the depiction of building juts, parallel features, vegetation and surface cover area representation, and so on, in the area where the feature is located. These are the minimum standards, and some features may be captured to a higher standard.

Label	Definition
Moorland	The core data that the feature has been based upon was captured to an expected positional accuracy of 4.1m RMSE. In addition, this defines the guidelines that were applied regarding the depiction of building juts, parallel features, vegetation, and surface cover area representation, and so on; these are outlined in the NGD user documentation. These are minimum standards and some features may be captured to a higher standard.
Rural	The core data that the feature has been based upon was captured to an expected positional accuracy of 1.1m RMSE. In addition, this defines the guidelines that were applied regarding the depiction of building juts, parallel features, vegetation, and surface cover area representation, and so on; these are outlined in the NGD user documentation. These are minimum standards and some features may be captured to a higher standard.
Urban	The core data that the feature has been based upon was captured to an expected positional accuracy of 0.5m RMSE. In addition, this defines the guidelines that were applied regarding depiction of building juts, parallel features, vegetation, and surface cover area representation, and so on; these are outlined in the NGD user documentation. These are minimum standards and some features may be captured to a higher standard.