Assigning a color to areas based on aggregated parameters (LOS)

During a simulation, you can show a grid-based or area-based display of pedestrian attribute values according to different LOS schemes (Using LOS schemes for showing aggregated pedestrian values). During simulation, this allows you to easily distinguish between different areas in the network, e.g. in order to identify relevant differences in the pedestrian density of a an area or different pedestrian speeds. You can set the display to 2D or 3D mode.

• When you choose Areas as a basis for classification, you can also show result attributes during the simulation, namely the parameters Speed and Density and define classes for them.
• When as a basis for classification, you select Pedestrian Grid Cell Data, a grid is placed over the network that is used as a basis to record its density, density of worst interval, expected density, expected density of worst interval, speed and speed of worst pedestrian interval. The parameter values are determined by cell and are visualized through the cell color. Grid cells that are only partially on areas or ramps or are partially occupied by obstacles are not considered walkable ground. For technical reasons, the 2D and 3D display might slightly differ where there is a transition from areas to ramps and stairways.

Note: To record these data, you need to configure the recording in the evaluation of areas and ramps (Evaluating pedestrian density and speed based on areas). Otherwise, areas are displayed in their static colors during the simulation.

You can, for example, show the average density in color during the last evaluation interval of the simulation. To do so, select the attribute Density / Current run x Last completed. Afterwards, during the simulation run, you can watch how the colors change depending on the evaluation interval.

If the data of the attribute set is not yet available, because the time interval selected has not begun yset, each area or cell is displayed in its static color. The latter is also used when no color scheme has been activated.

In 2D mode, areas, ramps, and stairs defined for separate levels are displayed in different transparent shades, depending on the height of the level they are on. This means the colors can no longer be directly compared in the LOS display. For a comparison, open a Network editor for each level whose objects you want to compare, and in it show the respective level only. The objects are then shown in opaque colors and can be compared in different Network editors.

In 3D mode, areas, ramps, and stairs on different levels are not displayed in "transparent" in a Network. If you want to hide individual areas, ramps or stairs for comparison, in the attributes of these objects, select a display type with the attribute invisible (Defining display types). Go to the graphic Parameters of the network object type, if you want to select the transparent type of display for all network objects of a 2D and 3D network object type: Fill style Solid fill and fill color with the Alpha value set to 0 in the color definition (List of graphic parameters for network objects).

You can make similar settings for links (Assigning a color to links based on aggregated parameters).

You can simultaneously show the pedestrians in color. This is based on the attributes of the pedestrians (Assigning a color to pedestrians based on an attribute).

Parameter-based area visualization - grid-based or area-based

You can choose between grid-based or area based for area visualization. You then configure and activate visualization in the graphic parameters of the network object type Areas.

Option 1: Parameter-based area visualization - area-based

1.  Before starting a simulation, make the following settings:

2.  From the Evaluation menu, choose Configuration > Result Attributes tab > Areas & ramps.

3.  Select Collect data.

4.  Into the From time and To time boxes, enter the simulation seconds during which you want to collect data for a classified display.

5.  Into the Interval box, enter the length of the time intervals for which you to aggregate data.

6.  Confirm with OK.

Option 2: Parameter-based area visualization - grid-based

1.  Before starting a simulation, make the following settings:

2.  From the Evaluation menu, choose > Configuration > Result Attributes tab.

3.  In the Pedestrian Grid Cells row, select Collect data.

4.  If desired, change the time and/or the interval (Configuring evaluations of the result attributes for lists).

5.  Click the More button.

The Pedestrian Grid Cells window opens.

6.  Make the desired changes (Grid-based evaluation of pedestrian density and speed).

7.  Confirm with OK.

8.  Confirm with OK.

Activating parameter-based area visualization

1.  On the network object sidebar, next to Areas, click the Edit graphic parameters button .

The list with the graphic parameters of the network object type opens (List of graphic parameters for network objects).

2.  In the Drawing mode list box, click Use color scheme.

3.  In the list of graphic parameters, click Color scheme configuration.

If the window does not open because the option has been deactivated since program start, click the  icon at the end of the row to open the window.

4.  For an area-based classification, in the Classification based on section, select Areas.

5.  For a grid-based classification, in the Classification based on section, select Pedestrian Grid Cell Data.

6.  Make the desired changes:

Symbol	Name	Description
	Attribute	Opens a window that allows you to select an attribute or subattribute. Density Density - duration exceeding threshold Density (worst interval) Level Density experienced Experienced density - duration exceeding threshold Experienced density (worst interval) Speed Speed - duration exceeding threshold Speed (worst interval) Speed variance Velocity variance - duration exceeding threshold Required Safe Egress Time: Latest simulation second in the time interval when a pedestrian was inside the grid cell. If the fire event is assumed to start at the beginning of the simulation, you can calculate how long a position must be kept smoke-free so that all evacuees have sufficient time to leave the building. Ramp/Stairs If in the evaluation configuration of pedestrian-grid cells, Only last interval is selected, this enables the attributes Density (worst interval), Experienced density (worst interval) and Speed (worst interval) to display the corresponding results aggregated. The result attributes can be filtered (Setting a filter for selection of subattributes displayed).
	Predefined color scheme	Open the Select pre-defined color scheme list box (Using LOS schemes for showing aggregated pedestrian values): Show a defined color scheme in the Class bounds and colors: list. The color schemes vary in color and class bound.

 

Name	Description
Class bounds and colors list	Edit color scheme. On the shortcut menu, click Add to add a new row to the list and define additional class bounds and colors. Lower bound column: Value that represents the lower bound of the selected attribute within this value range. From MIN, based on upper bound of the row above. Upper bound column: Value that represents the upper bound of the selected attribute within this value range. The upper bound belongs the value range. Column Color: Select the color. You may also enter RGB values. Name column: Name of the class in the legend The unit of the values depends on the attribute selected and is displayed in the Classification section, below the attribute selected.
Range scale factor	Enter a factor for the upper bound and lower bound Apply button: Multiply values of upper bounds and lower bounds by a factor

7.  If you want to change the RGB values in the Color column, double-click the desired row.

8.  Select the desired colors.

9.  Confirm with OK.