Oracle Spatial Network Data Model Demo
Frequently Asked Questions:
- I don't see the map. Only an empty gray box is displayed. Why?
It is possible that the mapviewer url, base map url or base map name is not configured correctly. Please double check the values of those fields on the getConfiguration.jsp page.
If the browser you are using is on a different machine from the ndmdemo server, make sure you replace localhost
in Mapviewer URL and Base Map URL on the getConfiguration.jsp page with the real ndmdemo server name.
Another possiblity is that the ndmdemo datasource is not defined in mapviewer. Please check your mapviewer datasource page.
- The analysis result shows disconnected links on the map. Why?
To avoid overloading the browser, the demo allows you to configure the maximum number of FOIs you want to display on the map. If the number of FOIs to be displayed in the analysis result exceeds the configured number, only part of the analysis result will be displayed, therefore you see disconnected links on the map. You can change the maximum number of FOIs using the getConfiguration.jsp page.
- It takes too long for the analysis result to be displayed on the map, even though it takes little time for the text result to be displayed. Why?
The analysis result probably contains too many FOIs (links, nodes, pathes, etc), which have overloaded the browser. You can either scale down the analysis radius by decreasing the number of neighbors or cost in the analysis input, or change the maximum number of FOIs using the getConfiguration.jsp page.
- The text result is incomplete. Why?
To control the amount of data transmitted to the browser and to avoid overloading the browser, the demo allows you to configure the maximum number of characters you want to display on the text result panel. If the number of characters to be displayed in the text result exceeds the configured number, only part of the text result will be displayed, therefore you see incomplete text results. You can change the maximum number of characters using the getConfiguration.jsp page.
- What is the default link cost?
The default link cost is the value of the link cost column defined in network metadata.
- The result path passes through the prohibited zone. Why?
You need to select the custom.ProhibitedZoneConstraint
in the Network Constraint multi-select box.
- What are the parameters used in the trucking constraints?
For simplicity reason, the trucking constraint parameters are hard-coded in
the AnalysisEngine. You can find the exact values for those parameters
by searching for the following constants in
AnalysisEngine:
TRUCK_HEIGHT,
TRUCK_LENGTH,
TRUCK_WIDTH,
TRUCK_WEIGHT,
TRUCK_PER_AXLE_WEIGHT.