PointOnPointOverlayer

The通过...分组parameter specifies a series of attributes that must match on the point and polygon features before the attributes will be merged. This can be used to ensure that the overlay occurs only on certain groups of features.

Note:How parallel processing works with FME: seeAbout Parallel Processingfor detailed information.

This parameter determines whether or not the transformer should perform the work across parallel processes. If it is enabled, a process will be launched for each group specified by the通过...分组范围。

并行处理水平s

For example, on a quad-core machine, minimal parallelism will result in two simultaneous FME processes. Extreme parallelism on an 8-core machine would result in 16 simultaneous processes.

You can experiment with this feature and view the information in the Windows Task Manager and the Workbench Log window.

是的: This transformer will process input groups in order. Changes on the value of the通过...分组parameter on the input stream will trigger batch processing on the currently accumulating group. This will improve overall speed if groups are large/complex, but could cause undesired behavior if input groups are not truly ordered.

No: This is the default behavior. Processing will only occur in this transformer once all input is present.

The重叠计数属性added to output point features holds the number of point features to which the point was near.

Each input point has the attributes from any other point within thePoint Tolerancedistance merged onto it.

Merge Incoming: The original feature will retain all of its own un-conflicted attributes, and will additionally acquire any un-conflicted attributes that the incoming feature has. This mode will handle conflicted attributes based on theConflict Resolution范围。

Prefix Incoming：原始功能将保留其所有属性。此外，原始将获取反映传入功能属性的属性，名称为前缀Prefix范围。

Only Use Incoming: The original feature will have all of its attributes removed, except geometry attributes that start withFME_. Then, all of the attributes from one (arbitrary) incoming feature will be placed onto the original.

Use Original: If a conflict occurs, the original values will be maintained.

使用传入的: If a conflict occurs, the values of the incoming will be transferred onto the original.

If theAccumulation Mode参数设置为Prefix Incoming, this value will prefix attributes that are being added to the original feature from the incoming feature.

If the optionalList Nameis supplied, each output point will also have an attribute list containing the attributes from each point that is within thePoint Tolerancedistance.

Note:列表属性从工作台中的输出架构无法访问，除非首先使用在它们上操作的变压器处理它们，例如ListExploderorListConcatenator. All list attribute transformers are displayed in the Contents pane of the Transformer Help under清单. Alternatively,AttributeExposercan be used.