Resolution of the NHD
The NHD is available in different resolutions. The density of the features increases as the scale increases.
Medium resolution NHD is 1:100,000 scale.
High Resolution NHD is 1:24,000 scale.
Local Resolution NHD is anything better than 1:24,000 and may be derived from a data collection method such as LiDAR. Local Resolution NHD is contained within the high resolution database.