The Feature Layer (archive) source type in ArcGIS Velocity loads features that have been exported to a feature layer archive.
Examples
The following are example uses of the Feature Layer (archive) source type:
- Another user selects a feature layer that has a data retention export strategy enabled to ingest historical data for analysis.
- A city planning department selects a feature layer with a data retention export strategy to analyze five years of historical traffic data. This helps them identify congestion patterns and make data-driven decisions to improve road infrastructure.
Usage notes
Keep the following in mind when working with the Feature Layer (archive) source type:
- When choosing a feature layer that has an associated feature layer archive, you can filter the available content while browsing for your content or your organization's content. You can further filter by the following:
- Content modified on a specific date
- Content created on a specific date
- Content with specific tags
- A feature layer archive only includes features that have been exported and deleted from the associated active feature layer. To perform analysis on the entirety of your data, including active features, configure both a feature layer source type and a feature layer archive source type in your big data analytic and use the Merge tool to merge the two data sources in a big data analytic before adding other tools. In real-time analytics, the feature layer archive can be brought in as a source.
- When data is exported to the feature layer archive, additional date fields are created that represent the start time (START_TIME) and end time (END_TIME) of the feature. The values are a duplicate of the date and time values in the original fields and can be dropped if necessary.
- After configuring source connection properties,configure input data to define the schema and the key properties.
Parameters
| Parameter | Explanation | Data type |
|---|---|---|
Item ID | The item ID of a feature layer that has an associated archive. | String |
Considerations and limitations
The following are considerations and limitations when using the Feature Layer (archive) source type:
- Only feature layers generated by Velocity are supported, specifically feature layers for which the data retention policy includes exporting older data to the archive.
- When configuring a data source to load from the feature layer archive, there is currently a limitation with sampling where the sampled features can show incorrect date and time values, such as 1858-10-13T08:08:37Z. This issue is limited only to the sampling of values and does not affect successful data ingestion. This issue will be addressed in a future release.