B. Data Source Woolpert, of Dayton, OH created the original hydrography coverage, in conjunction with the initial GPS photo control network and digital orthophotography completed in August, 1995. 8 C - Modifications to the attribute table were completed by Bruton Center staff and are outlined below. As the digital orthoimage base map is geographically extended, Maintenance Organizations will extend the coverage boundaries as well as update features by interpretation from those digital orthophotos. Features that are connected to one another hydrologically form a skeletal structure representing the branching patterns of surface-water drainage systems. Linear surface water features, regardless of connectivity, comprise the streams coverage.
Shores are polygonal features for any body of standing water, such as reservoirs, lakes or ponds.
A stream may be divided into segments that represent a single arc. Arcs representing each stream will be split at intersections with other arcs in the stream coverage. A node defines the beginning and ending point of a stream segment. Each stream segment and each polygon will have an identifier that shall be unique both within and between organizations in the Consortium. Other attributes associated with hydrography features are outlined below.