Elevation-Derived Hydrography READ Rules: Connector
A known, but nonspecific, connection between two non-adjacent network segments. Connector feature types are used when two surface-water features appear to interact through a constructed feature but there is no discernable evidence of the interaction on the surface. A connector is used to show the connection between the lake/pond and the stream output through a dam.
Attribute/Attribute Value
Each feature requires domain codes to be entered into the attribute table for the feature class (Elevation-Derived Hydrography Feature type description, associated geometry, and use classification table in the Elevation-Derived Hydrography Data Acquisition Specifications 2023 revision A2). See “Field Definitions and Domain Values for Attributes” section for more information on Elevation-Derived Hydrography code definitions.
Delineation
The limit of connector is the virtual line connecting two nonadjacent network segments.
Representation Rules
When delineating a feature, it must be created with the appropriate geometry, either point, line, or polygon, which is determined by the size of the feature or the length along different axes of the feature (table 3).
Special conditions: none.
Table 3. Connector Representation Rules.
| Kind of feature object | Area | Shortest Axis | Longest Axis |
| 0-dimensional (point) | -- | -- | -- |
| 1-dimensional (line) | -- |
greater than 0 but less than 50 ft (15 m) |
-- |
| 2-dimensional (polygon) | -- | greater than 50 ft (15 m) | -- |
Data Extraction
Capture Conditions
If connector is required to maintain connectivity between two network feature objects that represent canal/ditch, lake/pond, sea/ocean, or stream/river,
then capture.
Attribute Information
FClass 1— Hydrography feature defined within the collection criteria of the elevation-derived hydrography specifications.
FCode 33400—Connector (a known, but nonspecific, invisible connection between two nonadjacent network segments).
EClass 3— Linear features below ground level—Examples include connectors through dams, culvert connectors, and terrain breach connectors. Used for hydro-enforcement.
Source Interpretation Guidelines
The following list of conditions indicates when and why the capture of connector is required:
- When connector is part of a network that is represented as being connected.
- When there is a gap with no collected network feature object between pieces of the network; for example, at a 2-dimensional (polygon) dam/weir that causes a gap between an upstream lake/pond and a downstream stream/river.
