Frequently asked questions about—Help

The community contains a download that has a sample dataset to use for evaluation based on the State of New York's LRS and Highway Performance Monitoring System (HPMS) event data.

Download sample data.

Can I run on a virtual machine?

Yes. It is important to ensure that the virtualized environment meets the minimum system requirements needed by . In the case of local virtualization, or running a virtual machine player on a local machine (not a cloud), it's important to note that the minimum system requirements are what the emulated environment needs to provide to . This is in addition to the virtualization environment's minimum system requirements to support the virtualization software.

How do I migrate my data to ?

The storage model for organizations looking to migrate to is not the same for all: some have a spatial LRS with geometry, and some do not; some use the geodatabase, and some do not. The general steps to migrate are as follows:

First, understand the minimum schema for common centerline storage (two tables and two feature classes).
For more information, see ALRS data model.
Understand the data requirements for event data to map against a LRS.
For more information, see Registering an event by route and measure.
Translate your LRS and centerline current storage model into these tables.
This process is different for each organization. In some cases, where multiple linear referencing methods and networks need to be supported, centerline conflation may need to take place. Look at the LRMs your organization currently has and see if there are opportunities to consolidate and reduce the number of linear referencing methods and networks. If you can get your networks into an ArcGIS PolylineM feature class, there are scripts on the community that can help with the migration.
For more information, see community.
Once the LRS data is migrated, configure the ALRS.
For more information, see ALRS data model.
Decide which event tables or data will be modeled in the geodatabase under the management of , migrate these tables into the geodatabase, then register them with the network they reference.
For more information, see Registering an event by route and measure.

How do I configure the precision and scale for my measures in ?

The precision and scale for the networks comes from the settings on the measure column of the calibration point feature class. This information is propagated to each network.

The precision and scale for events comes from the settings on the From Measure and To Measure columns on the event feature class.

Where can I get the HPMS capabilities of ?

You can get them from the community.

For more information, see the community.

How do I upgrade my ALRS when moving to a newer version of ?

There is a context menu option in the Catalog window in ArcMap on the ALRS node of the geodatabase. Click the command to upgrade the ALRS and upgrade your event tables to event feature classes. The operation can take several minutes.

If your ALRS was using a 10.2.2 or earlier version of , you will be presented with the option to enable conflict prevention in the ALRS when you upgrade, which is disabled by default. For more information about conflict prevention, see Conflict prevention.

What are the minimum system requirements for ?

The system requirements for include the system requirements for . The memory (RAM), disk space, and processor power need to be adjusted based on the data volumes being worked with. For working with linear referencing data in , it is recommended to at least double the minimum RAM requirements specified by to allow for some of the memory requirements needed by event measure behavior processing logic.

For more information, see the ArcGIS for Desktop system requirements.

Can I use Oracle SDO_Geometry with ?

Yes SDO_Geometry is supported for use with .

Be aware there is a limit on the number of vertices in an SDO geometry object. For highly densified routes of long length in your network, this limit could be reached. For more information about this vertex limit, see How many vertices can be stored in a single SDO_Geometry.

Can I use the ArcGIS editing tools to edit centerlines in ?

Yes, you can use ArcGIS editing tools to create and reshape centerlines.

However, to split, merge, and delete centerlines, use the tools provided on the Roads And Highways Editing toolbar. These tools ensure that the relationships the centerlines have with routes are honored after the operation and are not broken.

Can I use the core ArcGIS editing tools to directly edit LRS Network routes?

No. Though the software doesn't prevent you from doing so, the routes in the LRS Network feature classes should never have their shape, route ID, from date, or to date directly edited. The edit activities (create route, extend route, retire route, realign route, and reassign route) on the Roads And Highways Editingtoolbar should be used for making changes to routes in a network.

If you accidentally edit and save changes on a route or set of routes in an LRS Network, the change can be repaired using the Generate Routes geoprocessing tool or by right-clicking the LRS Network in the geodatabase in ArcCatalog, and in the Catalog window in ArcMap by clicking Generate Routes.

For more information, see Generating routes.

Can I use the ArcGIS editing tools to directly edit event feature classes?

Event feature classes (events modeled in the geodatabase and registered with ) are events that have a shape column managed by . You should not edit event shapes. You can edit event attributes, route ID, from date, to date, and measures in the ArcMap attribute table, and will take care of updating the shape. also provides REST services to support editing event feature classes in a manner that allows to update the shape.

If you accidentally edit an event feature class shape and save the changes, has a menu option in the Catalog window in ArcMap on the geodatabase for the LRS event node that is registered with . Click Update Event Shapes to correct the shapes of the events.

For more information, see Updating event shapes.

Can I edit the same route in different geodatabase versions?

Though does not prevent more than one user from editing the same route at the same time in different versions, this practice is discouraged. If two or more users edit the same route in different versions and attempt to post and reconcile into a common version, conflicts will be detected on the route feature class for the network and potentially other elements as well, such as the centerline feature class and event. Since modifies event measures based on network edits in multiple event feature classes based on preconfigured rules, manual reconciliation of conflicts could be highly prone to error.

The recommended approach when this happens is for the second (and any other) user to refrain from posting and rolling back changes, accepting changes from the parent version, and redoing the edits.

Why do I get an Underlying DBMS error or ORA-01012: not logged on message when I resume my edit session?

This can happen when you are connected to Oracle from ArcMap and you have been idle for a while. By default, an Oracle database times out an idle connection after 60 minutes of inactivity. This time-out may be more or less, depending on your Oracle configuration. Once an idle connection time-out occurs, the Oracle database session ends and an error message displays.

Save edits and stop editing before leaving an ArcMap session. However, if an error occurs, you can close ArcMap and reopen the MXD.

Why do I get the message "Unable to create logfile system tables. User lacks permissions or resources to create tables" when I'm loading data into ?

This can happen when your Oracle database hasn't configured permissions to create sessions, tables, and sequences for log files to the user loading data. See logfiles-oracle for more information about log file configuration.

Can I use topology with ?

Yes, supports creating and maintaining topology on your data in an ALRS. To create a topology, put the feature classes that are to participate in the topology into a feature dataset in the geodatabase containing the ALRS.

If you have not created the minimum ALRS schema, create one and place the feature classes that will participate in a topology within the feature dataset you created. Typically, the calibration points, centerlines, and network feature classes would make sense to participate in a topology. For example, you could configure a topology rule to ensure networks or centerlines don't have dangles or a rule to ensure calibration points are always on centerlines.

Once you have the appropriate feature classes in a feature dataset, you can then create and validate the topology.

How do I restrict certain users from being able to change the configuration of networks and events in my ALRS?

To restrict modification of ALRS, LRS Networks and Events configuration, provide only write access to the LRS_METADATA, LRS_EVENT_BEHAVIOR for those users you want to be able to modify the LRS configuration. Other users need read access. For more information, see Configuring user permissions for editing LRS Networks.

What are the minimum system requirements for ?

The system requirements for include the system requirements for ArcGIS for Server; however, is only supported on Windows Server platforms (not Linux or UNIX).

The memory (RAM), disk space, and processor power need to be adjusted based on the data volumes being worked with. In addition, the number of machines in a cluster need to be scaled to handle the number of concurrent requests being requested from the deployment.

For working with linear referencing data in , it is recommended to at least double the minimum RAM requirements specified by ArcGIS for Server to allow for some of the memory requirements needed by the ArcGIS event feature layer, if you are publishing external event tables in your map services.

For more information, see the ArcGIS for Server system requirements.

Can I cluster map services with the linear referencing capability?

Yes, but you must have installed and licensed on each machine participating in the cluster.

Is it possible to access the geoprocessing tools on ArcGIS for Server?

Yes. To access the tools on ArcGIS for Server, the tools need to be published as part of a geoprocessing model. Refer to the toolbox located in the installation directory for an example of how to build a model to incorporate the geoprocessing tools.

Map services with external event tables are slow. Is there any way to boost performance?

External events in use the ArcGIS event feature layer. This layer locates events and draws them on a map at map request time. Though this feature is powerful and spatially enables data that does not maintain a shape, it is not as fast as a feature class. You may need to set your map scale dependencies so these layers only draw at certain scales.

In addition, make sure these tables have the route ID columns indexed. The ArcGIS event feature layers query all events on all routes that intersect the viewed map extent. Indexing allows the queries to execute faster.

Is it possible to edit external events in the Roadway Characteristics Editor (RCE)?

Not directly. RCE was developed to edit the event data modeled in the geodatabase registered with . The only way external event tables that are not modeled in the geodatabase can be edited from the Roadway Characteristics Editor is to create equivalent event feature classes in the geodatabase and register them with . Event data could then be edited, but a process would need to be developed to move edited data from those event feature classes into the external event tables to provide the updates to the external system.

What browsers does the Roadway Characteristics Editor (RCE) support?

Firefox
Google Chrome 4.0 or later
Internet Explorer 9 or later
Safari 4.0 or later

Why can't I edit certain records or attributes in the Roadway Characteristics Editor (RCE)?

The , Event ID, LocError, and ST_length fields are not editable.

How is Roadway Reporter licensed?

Roadway Reporter is a web application that is licensed separately from and . For details on pricing, contact your account manager.

Does Roadway Reporter require ?

Yes. Roadway Reporter is powered by and leverages a map service with linear referencing capability in addition to a geoprocessing service used to generate reports. For more information, see Roadway Reporter.

Does Roadway Reporter require Portal for ArcGIS?

No. You can configure Roadway Reporter to either use an on premise deployment of Portal for ArcGIS or configure it to use your Esri hosted ArcGIS.com for Organizations account.

Roadway Reporter uses Portal for ArcGIS to authenticate users and to store report configurations saved by users. For more information about deploying Portal for ArcGIS, see Configuring Portal for ArcGIS for Roadway Reporter.

How do I size and configure my server deployment to support Roadway Reporter?

Some reports can take several minutes or longer to generate, requiring a lot of ArcGIS for Server resources. It is possible to constrain the number of server cores that can be used by Roadway Reporter for the purpose of generating reports and to leave additional cores in your ArcGIS for Server cluster available for other purposes. Roadway Reporter informs users when cores are not available to run reports, and asks them to try again later.

When I save a report configuration in Roadway Reporter, where is it saved?

Report configurations are saved to Portal for ArcGIS or your Esri hosted ArcGIS.com for Organizations account, depending on which one you configured Roadway Reporter to use. They are saved in a file format that Roadway Reporter can read.

What steps should I take to ensure Roadway Reporter is producing accurate reports (for example, is my data accurate)?

The reports produced by Roadway Reporter are only as accurate as the data provided. To guarantee the best possible accuracy of your reports, ensure that your event data is free of errors and data duplication.

Roads and Highways provides tools to find certain errors with event data, including tools to find:

In addition, ArcGIS Data Reviewer for Desktop can be used to find attribute related errors and spatial errors.

Can I create reports with Roads and Highways without Roadway Reporter?

Reports can be in ArcGIS for Desktop without Roadway Reporter. ArcGIS supports the ability to create reports from feature data stored in the geodatabase. For more information on how to use ArcGIS to create reports, see A quick tour of reporting.

To report against the feature data in the geodatabase, some geoprocessing may be required to create the intermediate data product to report against.

Some tools that may be helpful when reporting against linear referenced data:

Overlay Route Events
Summary Statistics
Make Feature Layer
Create Feature Class
Select Layer by Location
Add Field
Select Layer by Attribute
Table to Table
Calculate Field
Make Table View
Alter Field
Delete Field

Is conflict prevention mandatory for ?

No, conflict prevention is not mandatory. When you upgrade your ALRS on the 10.2.2 or earlier version of to a newer version, conflict prevention will be disabled by default. You can change these settings in the ALRS properties. Conversely, you can choose to disable conflict prevention settings after it has been enabled in the ALRS. For more information, see Conflict prevention in .

When I edit a route in , why am I prompted to acquire a route lock?

Conflict prevention settings for your ALRS are reflected when editing in desktop. If conflict prevention is enabled, you will be prompted to acquire locks when performing cartographic realignments, in all of the editing activities, editing calibration points, generating and updating intersections, and during event registration. To learn about the different conflict prevention scenarios, see Conflict prevention in .

When I edit an event in the Roadway Characteristics Editor (RCE), why am I prompted to acquire an event lock?

Conflict prevention settings in the ALRS will be reflected in your deployment of the RCE. If conflict prevention is enabled, you will be prompted to acquire an event lock when you use any of the editing widgets in RCE. To learn more about conflict prevention in RCE, see Conflict prevention in the Roadway Characteristics Editor (RCE).

What are route locks and event locks?

Route locks are a capability in conflict prevention that allow a user to prevent other users from editing a route and events on a route while the route is being edited. When a route is locked, only the user with the lock can edit the route and events on the route in the version the lock was acquired. To acquire a lock on a route, a user must first reconcile with the lock root version. To release a lock on a route, a user needs to post changes to the route and events on the route to the lock root version.

Event locks are a capability in conflict prevention that allow a user to prevent other users from editing events for an event layer on a specific route. When events for an event layer on a route are locked, only the user with the lock can edit those events on the route in the version the lock was acquired. Other users may acquire event locks for the same route on a different event layer if needed. To acquire an event lock, a user must first reconcile with the lock root version. To release an event lock, the user needs to post changes to the locked events to the lock root version. If any event locks exist for a route, no users may edit the route until all event locks are released.

Why is the locked user in the locks table listed as Anonymous Web User?

Anonymous Web User is assigned as the locked user when a lock is acquired in RCE with security not correctly configured. Check the security settings in ArcGIS for Server, the RCE configuration file, and the web adaptor to verify security is correctly configured. To release these locks, post changes from the version with the Anonymous Web User to the lock root version or delete the version, then release the locks in the lock table.

How do I release route or event locks someone else has created?

If the user who has acquired the locks is not available to release them, an administrator can choose to delete the version in which the locks were acquired. Once the version is deleted, all locks acquired in that version can be released by any user with .

Why do I get errors when publishing my map service with linear referencing capability?

There could be a number of reasons:

Ensure that is installed on all machines participating in the cluster hosting the map service with linear referencing capability.
Ensure that any licenses haven’t expired and that the ArcGIS for Server licenses haven’t expired.
Ensure that is licensed on all machines participating in the cluster hosting the map service with linear referencing capability.

What do I do if I accidentally edit my event feature class shapes directly and save the changes?

If you accidentally edit an event feature class shape and save the changes, has a command in the Catalog window in ArcMap on the geodatabase for the LRS event node that is registered with . Click Update Event Shapes to correct the shapes of the events.

For more information, see Updating event shapes.

What do I do if I accidentally edit my routes in an LRS Network without using the Roads And Highways Editing toolbar?

If you accidentally edit and save changes on a route or set of routes in an LRS Network, the change can be repaired by using the Generate Routes geoprocessing tool, or by right-clicking the LRS Network in the geodatabase in ArcCatalog and in the Catalog window in ArcMap, then clicking Generate Routes.

For more information, see Generating routes.

My web map, a map service with linear referencing capability, will not load in RCE. What should I do?

There could be a number of causes:

Ensure the web map is published as public on ArcGIS.com.
Ensure the map service with linear referencing capability is running on ArcGIS for Server.
Ensure is installed on all machines in the ArcGIS for Server cluster hosting the map services with linear referencing capability.
Ensure RCE config.json file is properly formatted (compare it in a file compare tool with the original version to ensure the JSON syntax didn’t get corrected).
Ensure the web map configuration in the config.json file points to the correct web map.

Why doesn't redlining work in RCE?

Ensure that m and z support is not enabled on the Redline feature class and that map services with linear referencing capability have feature service capability enabled.