In GeoSTORM software, the user can assign invert elevations to project elements, such as routing reach and roadway segments based on the selected terrain surface. Following are the types of commands that can be used to assign invert elevations to the project elements:
- Assign Routing Reach Invert Elevations
- Assign Roadway Segment Invert Elevations
In this article, we will use the Assign Roadway Segment Invert Elevations command to describe how to assign roadway segment invert elevations in GeoSTORM software.
Follow the steps below to use the Assign Roadway Segment Invert Elevations command:
- From the Input ribbon menu, click the Roadway Gutter/Ditch/Inlets dropdown menu and select the Assign Roadway Segment Invert Elevations command.
- The Assign Roadway Invert Elevations dialog box will be displayed, as shown below.
The following sections describe how to use the Assign Roadway Invert Elevations command and interact with the above dialog box.
Selecting Roadway Segments
The Select Roadway Segments section allows the user to select single or multiple roadway segment(s) for which elevations are to be assigned. This section includes a data grid table that lists all the roadway segment(s) contained within the current scenario of the project, as shown below.
The user can select the roadway segment(s) using any of the following methods to assign elevations:
- Check the checkboxes corresponding to each roadway segment in the Select Roadway Segments
- Click the [Pick] button, the Assign Roadway Invert Elevations dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the roadway segment(s) from the Map View. After selecting the roadway segment(s), press the [Enter] key or right-click and choose Done from the displayed context menu. The Assign Roadway Invert Elevations dialog box will be redisplayed.
- Alternatively, press and hold down the [Ctrl] key while selecting the roadway segment(s) directly from the Map View. After the selection is done, open the Assign Roadway Invert Elevations dialog box, and the selected roadway segment(s) will be shown as selected/checked within the Select Roadway Segments
After selecting the roadway segment(s), the total number of selected roadway segment(s) will be displayed in the Total selected read-only field, as shown below.
In addition, the data contained in a data grid table can be copied to the clipboard or exported as a Microsoft Excel or PDF document by using the right-click context menu commands, such as Copy, Copy Table to Clipboard, Export Table to Excel, or Export Table to PDF.
Assigning Invert Elevation
This section allows the user to assign an invert elevation to the roadway segment(s) using a terrain model. In addition, the user can define the elevation offset to raise or lower the roadway segment by the specified amount using the Apply elevation offset checkbox option. On selecting this checkbox option, the entry field next to it becomes available to enter an elevation offset value. A negative offset value will lower the roadway segment by the specified amount.
Note: Define this section before assigning roadway segments so that the invert elevation can be assigned.
Terrain Elevation Source
Depending upon the terrain elevation source type selected, different options are provided to specify additional elevation data information.
The Terrain elevation source dropdown combo box supports the following surface types:
- CAD Drawing
- Elevation Grid
- GIS Contours
- LandXML Data
- Terrain Surface
- TIN Surface
CAD Drawing
If the user selects CAD Drawing as the terrain elevation source, the contents of the Assign Invert Elevation section changes as shown below.
The following options are displayed when CAD Drawing is selected as the terrain elevation source:
- CAD drawing layer
This dropdown combo box allows the user to select the CAD drawing layer available in the project.
- Drawing layers
Clicking the [Define] button adjacent to the Drawing layers entry displays the CAD Drawing Layers dialog box, which allows the user to define the properties of the drawing layers.
Elevation Grid
If the user selects Elevation Grid as the terrain elevation source, the contents of the Assign Invert Elevation section changes, as shown below.
The following option is displayed when Elevation Grid is selected as the terrain elevation source:
- Elevation grid layer
This dropdown combo box allows the user to select the elevation grid layer available in the project.
GIS Contour
If the user selects GIS Contours as the terrain elevation source, the contents of the Assign Invert Elevation section changes, as shown below.
The following options are displayed when GIS Contours is selected as the terrain elevation source:
- GIS polyline layer
This dropdown combo box allows the user to select the GIS polyline layer type.
- Elevation attribute
This dropdown combo box allows the user to select the elevation attribute type.
LandXML Data
If the user selects LandXML Data as the terrain elevation source, the contents of the Assign Invert Elevation section changes, as shown below.
The following options are displayed when LandXML Data is selected as the terrain elevation source:
- TIN surface layer
This dropdown combo box allows the user to select the TIN surface layer type.
- TIN surface
This dropdown combo box allows the user to select the TIN surface type.
Terrain Surface
If the user selects Terrain Surface as the terrain elevation source, the contents of the Assign Invert Elevation section changes, as shown below.
The following option is displayed when Terrain Surface is selected as the terrain elevation source:
- Terrain surface layer
This dropdown combo box allows the user to select the terrain surface layer type.
TIN Surface
If the user selects TIN Surface as the terrain elevation source, the contents of the Assign Invert Elevation section changes, as shown below.
The following options are displayed when TIN Surface is selected as the terrain elevation source:
- TIN surface layer
This dropdown combo box allows the user to select the TIN surface layer type.
- TIN surface
This dropdown combo box allows the user to select the TIN surface type.
Assigning Roadway Segment Invert Elevations
After defining all the required options, click the [Assign] button and the software will compute and display the invert elevation for the selected roadway segment(s).