Importing From GEOPAK

In Bentley StormCAD CONNECT, support has been added to import and export GEOPAK drainage model data. Bentley StormCAD CONNECT leverages the GEOPAK runtime, so this support is only available in MicroStation with a GEOPAK license. Import and export of GeoPAK drainage files only works in an integrated environment of Bentley StormCAD CONNECT/GeoPAK/MicroStation.

A GEOPAK drainage model consists of three files:

GPF file for drainage preferences
DLB file which is the drainage library
GDF file which contains the drainage model data

Note: There are two variants of PowerCivil - "PowerCivil for North America" and "PowerCivil <for Country>". For help on data transfer with PowerCivil for North America, refer to the topics on GEOPAK, and for help on PowerCivil <for Country>, refer to the topics on InRoads.

As with any independent set of applications, there is not a perfect mapping of the data from one system to the other. The differences are described below.

Importing GEOPAK Drainage Files

You can create a Bentley StormCAD CONNECT model by importing a GEOPAK drainage model. If you are in the same DGN file that contains the element references to the GEOPAK drainage file, the geometries for the areas and links will be derived from the MicroStation elements. If not, then the geometries will be limited to whatever is available in the GDF file.

Bentley StormCAD CONNECT utilizes the following mappings between GEOPAK for importing:

Library Objects:

Note: For grate in sag, the length and width for Bentley StormCAD CONNECT are computed from the grate area and perimeter.

For the elements the following mappings are used:

Note: For junction loss equations and reduction, the Bentley StormCAD CONNECT method will be set to Absolute with a loss value of 0.0.

Other values that may not necessarily map directly into Bentley StormCAD CONNECT are brought in as User Defined Attributes. Some of these attributes include Network Name, Pay Items and Pay Item Descriptions. These attributes can be used in FlexTables, Queries and Reports in Bentley StormCAD CONNECT.

Exporting to GEOPAK Drainage Files

You can create or update a GEOPAK Drainage File library and drainage file using this command. If the Bentley StormCAD CONNECT model was created using GEOPAK import, you will be prompted if you want to sychronize back to those files. Otherwise, you can create these files from scratch.

Note that you are prompted for two files, first is the DLB or drainage library in GEOPAK, second is the GDF or GEOPAK drainage file. There are also no MicroStation elements created from this export command, only the file data is written.

The mapping is the inverse of that described above.

Note: Headwalls are exported to GEOPAK but the hydraulic information is not, so you may need to review the data and adjust it if you need to do further hydraulic calculations in GEOPAK. For example, if the headwall represents a culvert inlet, you may need to specify the inlet characteristics.

Additional

There are two additional commands available as keyins only. You can import and export only library data (storm data, conduits catalogs and inlet catalogs) using these commands.