For the calculation of a 2D display, the attribute value of any desired attribute is spread two-dimensionally from each point object of the desired network object type. The propagation speed (or propagation rate) determines how fast the attribute value increases with a growing distance from the point object. The value at any point in the surface is the minimum of all values which were calculated for this point based on different point objects, i.e. formally the minimum of (network object attribute value + distance to network object / propagation speed or rate) over all network objects.
1. From the Graphics menu, choose Edit graphic parameters.
The Edit graphic parameters: Network editor window opens.
2. In the navigator, select the entry 2D display.
3. Make the desired changes.
|
Element |
Description |
|
Draw layer 2D display |
If the option has been selected, a 2D display is drawn for the selected point object. |
|
Drop-down list point object |
Here you select the network object for which you want to display a 2D display. |
4. Use the button labeled with the attribute name to select the attribute by which you want to classify the display.
For the selected attribute classes are displayed.
5. Use the Redefine all classes button to edit the classification (Displaying classified objects based on attribute values)
6. Specify any further settings you need.
|
Element |
Description |
|
Propagation speed |
The propagation speed / propagation rate determines how fast the attribute value increases at a point with a growing distance from the point object. Note If the selected attribute is of type duration, the label changes to Propagation rate. |
|
Propagation time |
Together with the propagation speed, the propagation / propagation rate determines how far an attribute value is spread two-dimensionally. If the propagation speed is, for example, 10 km/h and the propagation time 30 min, the attribute value 5 km is spread two-dimensionally. If no value is specified for the propagation speed, each point object is spread up to the end of the visible area. Note If the selected attribute is of type duration, the label changes to Propagation time. |
|
Color for areas not reached |
Here, you can select a color which is used for the display of the areas outside of the propagation borders of the point objects. All points on the map for which no value has been calculated because no point object was spread up to here, will be displayed in this color. The color is only relevant if a propagation time has been specified. |
|
Image quality |
Here you can specify the quality for the graphical output. |
|
Continuous color gradient |
If the option has been selected, smooth color transitions visualize increasing and decreasing attribute values. |
7. Confirm with OK.
