It maintains the relationships between each map feature and a corresponding tabular record. None Acknowledgement of the U.S. Geological Survey and the Scientific Assessment and Strategy Team would be appreciated in products derived from these data. No independent evaluation of the attribute or positional accuracy of the source data was undertaken. All data were found to be topologically correct. No duplicate features are present.
All lines intersect where intended.
No undershoots or overshoots are present. Polygon and arc-node topology present. Data completeness reflects the content of the sources from which the polygons were retrieved. Features may be eliminated, misaligned, or generalized on the source graphic, due to scale and legibility constraints. Features were digitized by visual interpretation from the operator.