Relationship to Surface - Vertical location relative to the surface.
At or near - At or slightly above the surface
Elevated - Supported above the earth
Underground - Buried
Underwater - Always submerged
Unspecified - The value is not known and is not required
The limit of PIPELINE that is underground is the edge of the ground scars or linear clearings.
The limit of PIPELINE that is at or near the ground or elevated is the extent of the structure.
The limit of PIPELINE that is underwater is as shown on the final compilation provided to USGS
If PIPELINE is an aqueduct,
If PIPELINE is aboveground and is outside of a congested area; and is a trunk line; and is
≥ 0.25" from a paralleling road, railway, or other linear feature,
If PIPELINE is underground and surface scars are present; and is outside of a congested area; and is a trunk line; and is ≥ 0.25" from a paralleling road, railway, or other linear feature,
If PIPELINE is a penstock or siphon and is ≥ 0.12" along the longest axis, Then capture.
If PIPELINE is for stormwater, local data stewards will provide capture conditions.
If Pipeline Type = Siphon,
Then Relationship to Surface = Unspecified.
Source Interpretation Guidelines
If PIPELINE, with Pipeline Type = Siphon, causes a gap in CANAL/DITCH, Then
capture PIPELINE only.
If a siphon does not meet capture conditions for PIPELINE, Then capture
CANAL/DITCH and, if required, capture UNDERPASS to allow definition of the
relationship between CANAL/DITCH and the feature over or under which it passes.
If PIPELINE is elevated over a depression by a structure built for that purpose, Then
capture only PIPELINE, with Relationship to Surface = Elevated.
If PIPELINE is within TUNNEL,
Then capture both PIPELINE and TUNNEL.
If PIPELINE conveys water,
Then collect in the theme Hydrography.
If PIPELINE conveys a product other than water,
Then collect in the theme Built-up.
If PIPELINE is labeled "Pipeline Bridge",
Then capture PIPELINE, with Relationship to Surface = Elevated.
Revision – General
Revision – Standard
Revision – Limited
Revise above ground pipelines only. Retain existing features.
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