CanalDitch Template

 

Delineation

The limit of CANAL/DITCH is the top of the banks of the artificial waterway.

 

To accommodate variations in the shortest axis of CANAL/DITCH:

 

If shortest axis of CANAL/DITCH is:

·         < 0.025" but ≥ 0.01" for a distance < 2.64", and is connected at both ends to a 2-dimensional CANAL/DITCH, Then CANAL/DITCH is represented as a 2-dimensional basic feature object.

 

·         < 0.025" but ≥ 0.01" for a distance ≥ 2.64", or < 0.01" regardless of distance, and is connected at both ends to a 2-dimensional CANAL/DITCH, Then CANAL/DITCH is represented as a 1-dimensional basic feature object.

 

·          0.025" but < 0.04" for a distance < 2.64", and is connected at both ends to a 1-dimensional CANAL/DITCH, Then CANAL/DITCH is represented as a 1-dimensional basic feature object.

 

·          0.025" but < 0.04" for a distance ≥ 2.64", or ≥ 0.04" regardless of distance, and is connected at  both ends to a 1-dimensional CANAL/DITCH, Then CANAL/DITCH is represented as a 2-dimensional basic feature object.

 

Data Extraction

Capture Conditions

 

If CANAL/DITCH is named,

Or

If CANAL/DITCH is ≥ 0.005" along the shortest axis,

Then capture.

 

Attribute Information

 

If water level of CANAL/DITCH is controlled by GATE with Gate Type = Lock, and CANAL/DITCH is ≥ 0.025" along the shortest axis and ≥ 0.5" along the longest axis and is not coincident with LOCK CHAMBER, then Elevation = (Integer Value), Else  Elevation = Not Applicable.

 

Source Interpretation Guidelines

 

All

 

If CANAL/DITCH meets capture conditions, and coincides with BRIDGE, LOCK

CHAMBER, or TUNNEL, Then capture both CANAL/DITCH and the other feature.

 

If CANAL/DITCH meets capture conditions, and coincides with a structure, but that

structure does not meet the definition and capture conditions for another feature (BRIDGE,

FLUME, PIPELINE with Pipeline Type = Siphon, TUNNEL), 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.

 

Structures which carry CANAL/DITCH over another feature are captured as

FLUME or BRIDGE.

 

Do not capture underground aqueducts that are not in TUNNEL as CANAL/DITCH. See

PIPELINE with Product = Water, Pipeline Type = Aqueduct, and Relationship to Surface =

Underground.

 

Do not capture rivers that have been channelized to control flooding or erosion, or to

maintain flow for navigation as CANAL/DITCH. See STREAM/RIVER. Capture as

CANAL/DITCH only those inland navigation waterways that are cut through land to bypass

outcrops or rapids, or to connect two bodies of water.

 

If a canal or ditch passes through a siphon that meets capture conditions for PIPELINE with

Pipeline Type = Siphon, then do not capture CANAL/DITCH. See PIPELINE.

 

Do not capture ditches associated with a cranberry bog.

 

If 2-dimensional CANAL/DITCH meets capture conditions, and coincides with

NONEARTHEN SHORE or WALL, then capture both CANAL/DITCH and the other feature.

 

Graphic

 

Revision - General

Revision - Standard

Revision - Limited

 

Use ancillary source when the collection of Elevation is required.

 

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