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Roadway Standard Cadd "File Type" Naming
Convention /(See Note 1)
(See Design File Generator Utility in NCDOT Workspaces
All 2D MicroStation Graphics Files Should Have a ".dgn" Extension
| DRN |
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Drainage File (See Note 2) |
| DSN |
|
Proposed Roadway Design File |
| EOP |
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Edge of Existing Pavement File |
| LAY |
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Plan Sheet Layout File |
| PAT |
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Pattern Line File |
| PHM |
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Public Hearing Maps |
| PFL |
|
Proposed Profile Design File |
| PSH |
|
Plan Sheet Files |
| ROW |
|
Proposed ROW File |
| SHP |
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| SPD |
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Shear Point Diagram |
| SS |
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Slope Stake File |
| STR_REC |
|
Structure Recommendations |
| SUM |
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Summary Sheets File |
| SVY_REQ |
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Survey Requests |
| TSH |
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Title Sheet File |
| TYP |
|
Typical Sheets File |
| XPL |
|
Cross-Section Sheet Layout File |
| XSC |
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Cross-Section File |
Note 1:
This list refers only to the "file type" portion of the entire cadd file name. The standard for the
entire file name is as follows:
(TIP Number)_(Unit
Abbreviation)_(File Type)_(Description).dgn
Also, a distinction should be made between electronic
file names and hard copy production plan sheet numbers. Electronic file names are logical file
names that may or may not reflect the hard copy production plan sheet numbers. An
example would be the ".xpl" electronic file name.
This electronic file name may contain numerous hard copy production plan sheet numbers
such as X-1, X-2, X-3, etc; in this particular case possibly as MicroStation models.
Note 2:
As a rule, the roadway designer should
reference the ".drn" file created by the Hydraulics
Unit from the "Drainage" folder and use it as the
proposed drainage file. If necessary, however, the roadway designer may copy the ".drn" file
from the "Drainage" folder and modify the unit
code from "hyd" to "rdy" to
add or modify ditches. No drainage structures (inlets, catch basins, pipes, culverts,
etc.) should be added or modified in any way by the roadway designer. These type changes
should be made by
the hydraulics designer versus the roadway designer.
MicroStation 3D Graphics Files Not Requiring a ".dgn"Extension
| DTM |
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Digital Terranin Model / Approved File Type |
| DTL |
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Digital Terrain Model / Old File Type from
Location Surveys |
| DTP |
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Digital Terrain Model / Old File Type from
Photogrammetry |
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MicroStation Binary (Non-Graphics)
Files That Should Never Have a ".dgn" Extension
| TIN |
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Binary File Containing Triangle Data / Approved File Type |
| TNL |
|
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Binary File Containing Triangle Data / Old File
Type from L&S |
| TNP |
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Binary File Containing Triangle Data / Old File
Type from Photogrammetry |
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