Railway Bridges and Overpasses

Railway Bridges

A polyline feature class displaying the location of railway bridges and overpasses along the railway network.

Column Name

Nulls

Format

Size

Description

Constraints

FEATURE_TYPE

No

Text

50

Unique feature type that identifies the type of feature. Options:

• Elevated Railway

• Railway Bridge

• Railway Causeway

• Railway Overpass

dm_railway_

bridge

NAME

Yes

Text

100

The name of the feature (if available)

ATTRIBUTE_SOURCE

No

Text

100

If the feature is named, the attribute_source is the source imagery, map, or data from which the features name has been obtained.

If the feature is not named, the attribute_source is the source imagery, map, or data used to define what the feature type is.  

ATTRIBUTE_DATE

No

Date

Date of the source imagery, map, or data used for attributing the feature.

ADDITIONAL_NAMES

Yes

Text

100

The feature may be commonly known by other names or have different spelling. Multiple additional names can be shown and separated by a comma.

ADD_NAMES_SOURCE

Yes

Text

100

The source map or data that the additional names were obtained.  Multiple sources can be shown, separated by a comma. If multiple sources are shown, the written sequence will be the same as the written sequence of the names themselves.

FEATURE_SOURCE

No

Text

100

The source imagery, map, or data that the spatial location and shape of the of the feature was obtained from.

FEATURE_DATE

No

Date

Date of the source imagery, map, or data that the spatial location and shape of the feature was obtained from.

OPERATIONAL_STATUS

No

Text

20

The operation status of the feature. Options:

• Abandoned

• Dismantled

• Operational

• Non Operational

• Proposed

• Under Construction

dm_railway_

status

PFI

No

 Text

A Persistent Feature Identifier (PFI) is generated for each feature at the point of creation in the database. The value of the PFI will stay with the feature through all changes to the feature (both spatial and non-spatial) until the feature is retired. (See Persistent and Unique Feature Identifiers)

UFI

No

Text

A Unique Feature Identifier (UFI) is generated for each new feature at the point of creation in the database (at this point the PFI and UFI will be the same). The value of the UFI will stay with the feature through all changes to the feature (both spatial and non-spatial) unless the feature is split into multiple other parts. If the feature is split, the separate parts will retain the original PFI but new UFI’s will be generated for the split parts. (SeePersistent and Unique Feature Identifiers)

CREATED_DATE*

No

Date

The date the feature was originally captured and first loaded to the database

*internal use only

LAST_EDITED_DATE*

No

Date

Date of the last editing or revision to the feature

*internal use only

DIMENSION_M

No

Double

The length of the feature measured in metres GDA2020

UPPER_SCALE

Yes

Long

The upper scale for which the feature should be considered suitable for digital display.

dm_upper_scale

TEXT_NOTE

Yes

Text

50

For mapping purposes. Additional annotation that can be shown on a map.

ADD_INFORMATION

Yes

Text

255

A comment field (additional information)

ELEVATED RAILWAY

Definition: A structure carrying rail traffic that that is built above the surrounding landscape

Alternate Terms:

• Capture as a 2D polyline along the centre of the feature co-incident with the railway.

• Capture features of significance. e.g. a length greater than 25 metres, main rail line etc

• The location is plotted from orthorectified imagery

• Vertex points to coincide with the vertex points on the railway

• Locations can be obtained from other datasets, existing mapping, tourist publications, organisations, Government websites, or other source material.

RAILWAY BRIDGE

Definition: A structure erected over a waterway, depression, or obstacle to carry rail traffic

Alternate Terms:

• Capture as a 2D polyline along the centre of the feature co-incident with the railway.

• Capture features of significance. e.g. a length greater than 25 metres, main rail line etc

• The location is plotted from orthorectified imagery

• Vertex points to coincide with the vertex points on the railway

• If the feature is less than 25 metres and is named or significant, capture to the feature extents

• Locations can be obtained from other datasets, existing mapping, tourist publications, organisations, Government websites, or other source material.

RAILWAY CAUSEWAY

Definition: An embankment of earth or masonry erected across open water or an area subject to inundation and carrying a railway.

Alternate Terms:

• Capture as a 2D polyline along the centre of the feature co-incident with the railway.

• Capture features of significance. e.g. a length greater than 25 metres, main rail line etc

• The location is plotted from orthorectified imagery

• Vertex points to coincide with the vertex points on the railway.

• If the feature is less than 25 metres and is named or significant, capture to the feature extents

• Locations can be obtained from other datasets, existing mapping, organisations, Government websites, or other source material

RAILWAY OVERPASS

Definition: A separation of surface levels constructed to prevent direct intersection with other road or rail networks.

Alternate Terms:

• Capture as a 2D polyline along the centre of the feature co-incident with the railway.

• Capture features of significance. e.g. a length greater than 25 metres, main rail line etc

• The location is plotted from orthorectified imagery

• Vertex points to coincide with the vertex points on the railway.

• If the feature is less than 25 metres and is named or significant, capture to the feature extents

• Locations can be obtained from other datasets, existing mapping, organisations, Government websites, or other source material