How to use NetworkConstraint in Network Data Model?

e.g. In a transportation application, you may drive from Node1 to Node2 along Link12, and from Node2 to Node4 along Link24, but you can not 'turn-left' from Link12 to Link24, how to restrict this in Oracle Spatial Network Data Model?
Is there any examples?
Thanks a lot.

The only way I know to do it, is to have a more complex node model. Instead of a simple node joining links 12 and 24, you need several at that point that link the streets. For example, with a standard four-way intersection, each end of the streets would have a node (warning CRUDE drawing):
..A
B.+.C
..D
Links between those nodes could have directional restrictions, or not even exist at all between any two. So, you could set it up such that From D to A and B to C you can go either way. For right turns, D to C, C to A, A to B, and B to D are directional. For left turns, C to D, A to C, and B to A are directional, with no D to B link existing.
Hope that makes sense.

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Thanks for your response.
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We are able to retrieve the query based on Subject, Predicate and Object.
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Hi all,
can any one help me how to implement path direction using oracle network data Model?
We are using Oracle Spatial database. there is one feature called network constraint in Network data Model. but how to implement path direction of my Network ? Please help me any one

The path direction in a Spatial network is enabled at creation time when calling the create network procedure such as SDO_NET.CREATE_LOGICAL_NETWORK. If you describe the Create procedure you're using you should see a IS_DIRECTED argument, which when set to TRUE will enable path direction. Then just ensure that your links are created in the right direction -specifying correct orientation for start node and end node.
Cheers,
Stuart.

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bonjour , goodmorning
English:
I have an application of oracle network data modele witch contains node , link , plink and path tables. and i like to view this whith mapviewer application on web page, i was setup mapviewer 10.1 with OC4J and i saw the mvdemo without errors ... please get me the steps to do for visualizing my network.
Français:
j'ai mon propre réseau oracle network data modele et je voudrais le visualiser avec mapviewer sur une page web. le réseau contient les quatres tables necéssaire et pas de probleme dans ce coté. j'ai bien installer mapviewer avec le serveur OC4j et j'ai visualiser l'exemple mvdemo sans aucun probleme... SVP indiquez moi les etapes a suivre afin de visualiser mon reseau.

First may I recommend that you use the latest MapViewer quick start kit, which is 11g R1.
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Hi,
I've been playing with Gis for the last 10 years and now I am enrolled in a project to find best way to go from one point to another in Barcelona (Spain) locations, using the public transport network.
The goal is to get a route, from one address to another (both given as inputs), formed by:
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This is a nice problem to resolve with a quite good looking software like the Oracle NDM. I know the big problem will be to put all the data in the right format.
But the question I’d like to share with you would be to approve or improve the algorithm I am thinking to resolve this:
STRUCTURE
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ALGORITHM
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Hi Andrejus,
Thanks for answering.
I read through your thread already...
I understand and agree it would be a multimodal network. But what would that mean in the time of storing the data and asking for the route?
But I am still doubting the way to query for the resulting route. Having two adresses to join, would there be a nice function or procedure to ask for the route giving preference to walk the minimum meters and use preferently the bus network?
Or should I rely on the first algorithm I proposed? I thought there would be a nicer solution.
In your case, "road transport, railway transport, naval transport and air transport" I understand it would be a case to use different networks as they don't share spatial geometry, only some nodes..isn't it? Did you have the need to join all of them to find route solution giving preference to one of them?
Regards,
David

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Hi:
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Vijay
(703) 447-6708

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Hi
I have some data for my application car navigation system. I am using Oracle spatial feature in my database.we created network data model for our application. we want to populate One way path direction in my Network data model. I am not able to do Please help me

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Hi guys, is there anyone could give me a trace how to use reference type of data element.
More details i'm going to reach is:
I create 2 tables:
eq.
1. table ZFIRST has field X with data element ZFX (Data element i declared).
2. table ZSECOND has field Y.
Here at field Y (second table) I'm going to declare a new data element say it ZFY, but in ZFY I'm going to use the data element as i declared before (ZFX). Is it possible if I do it using reference type data element (SE11)?
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Edited by: dinivian dondi on Nov 4, 2010 8:30 AM

Field Y: Reference ZFX to class w/o interface cannot be used in DB table ZSECOND
What does it mean?. Did I miss something about using reference data element type?.
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[email protected]

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