Drag-and-Drop System Model Builder

In ArcMap table of contents, select the shape file- Subcatchment. Press the left button of the mouse on it and hold. Then drag it to the Model Object Panel and release it over the object- Subcatchments.

Fig 61: Drag-and-drop process in GeoSWMM

An attribute mapping window will appear as follows. Assign the property fields appropriately in this window. Then Click OK to accept the changes made and exit from the window. Note that you must assign the Name field. Other properties are optional. If not assigned, then the program-default values will be assigned automatically.

Fig 62: Attribute mapping windows in GeoSWMM

Click on Import button to add the external layer into the GeoSWMM project layer along with the mapped attributes/properties.
Follow steps 1-2 similarly for objects- Rain Gages, Junctions, Outfalls and Conduits. You can map the layer attributes in any order. While mapping subcatchment and conduit properties, you can assign custom area and length entries respectively, by specifying User Defined Area and User Defined Length fields. If these fields are not specified, GeoSWMM will automatically calculate the subcatchment areas and conduit lengths using the ArcMap projection information.
Click on OK button to complete the importing process. The model network is already developed. After the mapping is complete, click on the Save (
) button on GeoSWMM toolbar. The project will be saved and show you a notification message like the following figure. Click OK to accept.

Fig 63: Project Save notification

Notice that the geodatabase shows its layers with program-default symbology. However, you can also use the object symbology properties from the supplied layer (.lyr) files. Uncheck/ remove the shape files in the table of contents. Now the ArcMap window will display only the model geodatabase features. The Model Object Panel also shows a list of objects under each network item. Model network building is complete. Now label the object feature classes as shown below.

Fig 64: GeoSWMM model network