The data do not carry quantified accuracy statements. A check for invalid attribute combinations were performed both interactively and via batch procedures. The accuracy of attributes has not been explicitly tested against independent sources. However, all the data derived from the DLGs have been reviewed for anomalous visual patterns both on-line and in hard copy. No duplicate features are present.
All polygons are closed, and all lines intersect where intended.
Features may have been generalized or eliminated on the source graphic due to scale and legibility constraints. The accuracy assessment for each layer is individual to scale. A variance in resolution per coverage is explained in the respective theme documentation. Imagery exists as LAS images. A list of the SAST themes may be seen in the Appendix .