Create Existing Ground Profile
This process creates an existing ground profile for a given chain and stores the profile in COGO. To begin open the profile DGN file, XX####_VA.dgn.
Open the Project Manager, go to Directory>Current Working Directory, next Select Project, Select OK, and then Select User [name] from Project Users menu.
Select Existing Ground Profile tab on the Project Manager menu.
The Select Run menu will appear. Create a new run. Go to Run>New.
Enter a run name and description.
Select created run and then select OK
If the Working Alignment definitions are up to date in the Project Manager, much of the design data will be filled in automatically, such as chain and tin file information.
Ground Profile menu.
Use select icon or the navigate icon to choose fields.
Profile Name. Name of profile to be stored. Use a descriptive and succinct name. Ex_Rd79_Alt1is an example of existing ground profile road 79 Alternate 1. The rule for name length is 15 charters or less. Choosing an existing profile will cause it to be overwritten.
Job Number. The GPK file is the coordinate geometry database where the chain (baseline) and profile data are retrieved and stored.
Operator. Operator code identifies the individual user. An input file is generated and the naming convention for the GEOPAK input file is J[job number]O[operator code].inp or in this example j791oTR.inp.
Chain. Chain used to extract existing ground profile. Use Select button to choose chain name.
Offset. Distance either left (-) or right (+) of the chain to extract existing ground profile.
Beg/End Stations. Enter stations relative to the chain listed. To reset station fields, highlight station field and press delete key, then press tab button to populate station fields automatically with chain termini stations.
Options. Interval between successive VPI's in terms of master units. For all options except Intersect, the user is defining specific locations where VPI's are to be located, therefore these options are valid only for a binary TIN file. The Intersect option can be utilized with a binary TIN or 3D MicroStation design files containing surfaced elements.
- Increment - Creates a profile where the user specifies the incremental distance between successive VPI points on the existing ground profile where the first VPI point is coincident with the Beginning Station.
- Intersect - Creates a profile with VPI's at every location where the profile grade line (chain) intersects topographic elements. Essentially every triangle leg in the tin file.
- Even - Specifies the incremental distance between successive VPI points on the existing ground profile where the first VPI point is rounded to the next highest even station from the Beginning Station. For example, if the Beginning Station is 10+015 and the Even value is 25, the VPI's would be generated at 10+025, 10+050, etc.
- POT - Creates a profile with VPI's at every location where a POT (point of tangency) occurs in the referenced chain.
Radius of Output Circle. Works with the Intersect and POT option, this key in field identifies the radius (in master units) of a circle drawn at every location where a VPI is generated.
Tin File. The existing ground .tin file. Using the Project Manager will populate the file from the working alignment definitions.
Select Apply. Initiates process of extracting ground profile.
A default input (.inp) file name will be populated. This file is automatically created and used to create the ground profile in the next steps. Select OK
Input file process.
After processing, the store profile menu. Select Yes.
After storing profile, another option is to store the 3D profile string. WFLHD does not make use of this data. Select No.
Existing ground profile has been created.
Confirm profile creation and add description
Go to Project Manager menu> Coordinate Geometry menu>>Navigator.
Note created profile and added optional description. Use describe button to view and review profile data in COGO menu.
Describe profile data.
Continue to create existing ground profile