The objective of this task was to implement a custom viewer window that will display a selected route corridor on a geographic information system (GIS) map along with profile information about the corridor. The previous version of the PHT Analysis tool allowed the user to view profile information about a pre defined corridor route and a GIS window to define a corridor route, but not an interface that displays both sets of information collectively. An interface that displays both the source corridor and its profile information together provides better aid for decision makers in understanding the roadways to which the RSL forecasts apply.
A profile viewer window has been implemented to display a selected route corridor on a GIS map along with up to four profile information attributes about the corridor. A corridor is defined as a set of arcs representing a transportation infrastructure such as highways that have the following properties.
Before a profile map can be generated, it is necessary for the user to define a corridor using the GIS selection utility. A GIS selection is based on a GIS shape file and is used to define a set of highway sections that make up the corridor.
A set of data fields are used to link the PHT database with the GIS shape file as follows:
The viewer supports auto-arranging the layout of the window based on the orientation of the selected corridor. For example, if the general direction of the corridor is from east-west, the viewer will show the GIS map on the top or bottom portion of the window, while a north-south orientation will be shown on the left or right of the window. Manual arrangement of the window layout is also supported. The viewer also provides zooming controls such that when zooming into a profile chart, the data displayed in the other profile charts and the GIS map will change to match the selected range.
The PHT profile map viewer is implemented into the PHT graphical user interface as an integrated feature of the PHT analysis window. The Corridor Analysis tab provides access to the PHT profile map viewer as shown in Figure 78.
The top pane in the window displays a list of existing corridor profiles for you to select from, while the bottom pane displays the options for the selected corridor profile. You must select a set of PHT analysis results, a GIS selection that represents the continuous corridor, and up to four data items to profile.
Once you have selected the profile options, click the Display button in the toolbar to view the corridor profile. If you make any changes to the options for the profile, you must then click the Display button again to refresh the display window.
The toolbar at the top of the window provides for the following functions:
|Create New. Create a new profile analysis.|
|Delete. Delete the currently selected profile analysis.|
|Refresh. Refresh the display.|
|Display. Display the results of the currently selected profile. After making any changes, click this button to refresh the display of the corridor profile.|
The corridor profile identifies the pavement type of each highway section as a color code depicting rigid, flexible, and composite pavements for those regions of the corridor that have sample PHT data as shown in Figure 79. Regions without sample data appear gray. Corridors are characterized by virtual mileposts beginning at zero and incrementing based on the lengths of the highway sections that make up the corridor.
The toolbars provide for the following functions:
|Print. Display the print dialog to print the charts to a file, printer, or clipboard.|
|Stack Charts. Display the chart windows stacked vertically.|
|Tab Charts. Display each chart as an individual tabbed window.|
|Synchronize Y Axis. Synchronize the Y Axis of all the charts to a single scale.|
|Zoom. Activate chart zooming.|
|Copy. Copy the GIS map image to the clipboard.|
|Zoom and Pan. Zoom in or out, and pan through the GIS map.|
When zooming into an area of the profile, the zoom control will appear at the bottom of the window. Drag the beginning and ending markers left or right to adjust the zoom region. The GIS map will automatically track with the zoom region of the corridor and will highlight only those highway sections that appear in the profile charts. Toggle the zoom mode on/off by clicking the Zoom button o the toolbar.
The synchronize Y-axis button will cause all of the charts in the display to use the same scale for their vertical axis. This can be useful when comparing similar data on multiple charts.
The data fields for the maintenance analysis can be profiled also. Before the maintenance analysis results can be profiled you must first open the PHT analysis result window and apply a maintenance analysis to the PHT result data. The maintenance analysis results are not persisted or saved when the PHT result window is closed, so this window must remain open with a maintenance analysis applied for the maintenance analysis results to be available to be profiled.
When you select a set of PHT analysis results that has had a maintenance analysis, the additional results fields for the maintenance analysis will be appended to the list of data fields available for profiling. Simply select the maintenance data field(s) of interest as you would any other data field and click the Display button to refresh the profile chart.