Disponible avec la licence Location Referencing.
ArcGIS Pipeline Referencing supports three types of networks: linear referencing system (LRS) networks, LRS line networks, and LRS derived networks.
Réseau LRS
Un réseau LRS est un ensemble d’itinéraires mesurés selon une méthode de référencement linéaire (LRM) spécifique.
Exemple
Réseaux kilométriques et réseaux départementaux
Réseau linéaire LRS
Un réseau linéaire LRS est un groupe logique d’itinéraires relatif à une ligne où la mesure augmente ou diminue de façon monotone. Ce type de réseau prend en charge des événements qui couvrent des itinéraires et également des équations.
Exemple
Une classe d’entités Engineering Station Network inclut les champs nécessaires pour modéliser un réseau linéaire. 
| ID d'itinéraire | Nom de l\'itinéraire | Ordre de ligne | Identifiant de ligne | Nom de la ligne |
|---|---|---|---|---|
| {1838BE01-0BC9-4C58-9829-0F1D77717DCB} | Route1 | 100 | {C043CAF0-2BF7-4598-8AC8-B382647AD490} | RouteA |
| {26710A05-C499-42C1-BB73-D3A8D402B109} | Route2 | 200 | {C043CAF0-2BF7-4598-8AC8-B382647AD490} | RouteA |
| {5582FB08-84E3-49D4-8781-1D3EF7B4F2E2} | Route3 | 300 | {C043CAF0-2BF7-4598-8AC8-B382647AD490} | RouteA |
Réseau LRS dérivé
Un réseau dérivé est un réseau généré à partir d’un réseau linéaire. Dans un réseau dérivé, les itinéraires appartenant à la même ligne sont fusionnés pour créer un itinéraire dont la mesure de départ est égale à zéro.
Exemple
En utilisant une classe d’entités Engineering Station Network comme réseau parent, il est possible de dériver les itinéraires du réseau continu. Un réseau dérivé est un ensemble d’itinéraires dans lequel les mesures sont continues, une longueur sans branche d’une conduite physique. Ces mesures peuvent être utilisées à des fins de création de rapport et d’analyse de segmentation dynamique.
Why are different types of LRS networks needed?
Pipeline Referencing supports multiple linear referencing in a single geodatabase. Business units in an organization may need to report measures in many different LRMs. For example, engineering and construction may need to collect, maintain, and report events in engineering measures (also known as engineering stations), whereas other business entities need to report measures based on the continuous length of the pipe.
Location Referencing currently does not have a limit for the number of networks that you can create in a linear referencing system (LRS). However, the type of LRS Networks you need depends on your organization’s business process. Consider the following business case:
In a pipeline organization, there are three business units that collect, manage, and maintain pipeline assets. These three business units are surveying, engineering and construction, and regulatory and compliance.
The surveying group is in charge of collecting inline inspection (ILI) data, whereas the engineering and construction group is responsible for new construction, realignments, and work order management. The regulatory and compliance group is tasked with submitting and generating reports for the Pipeline and Hazardous Materials Safety Administration (PHMSA) and other government entities.
In this case, three types of LRS networks are needed to sustain each of the three business units.
- LRS Network—ILI runs can be loaded in this type of network using the Append Events tool and will maintain continuous, uninterrupted measures for ILI data based on odometer readings.
- LRS line network—Data such as anomalies can be extracted from ILI data using the Translate Event Measures tool and transformed into an LRS line network. You can then use anomaly events to report measures based on engineering measures for the work order management or operations group.
- LRS derived network—This type of network can be used for mileage or PHMSA reporting. Note that events can't be registered to this type of network.
When are different types of LRS networks required?
Every organization's business processes are different. If your business process only requires one type of network, you do not have to configure multiple LRS Networks. For example, if your business process requires continuous measures to be maintained and reported, then you can configure your LRS to only support a non-line LRS Network. Similarly, if your business process collects and maintains data with equation points or other engineering stationing, you can configure an LRS line network to maintain the data as it is collected and an LRS derived network for continuous measure reporting. In this scenario, you can also configure events to store derived measures.
Remarque :
The LRS derived network is generated from the LRS line network. If you don't configure an LRS line network, the LRS derived network can't be configured.
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