Dataset Parameters
Group By Scan
If you select this option, the feature type is named using the dataset name. If you do not select this option, the feature type name is the reader type name.
Scanner Instrument Type
Specifies the type of scanner instrument used to capture the data. FME uses this value to determine if the data contains reflectance. If so, the intensity attribute will contain reflectance values. If not, it will contain amplitude values.
Scan Day of Week
Specifies the day of the week on which the scan was taken. If the timestamp values in the file represent dayseconds, an appropriate offset is applied to all the timestamps. For example, if Monday is specified, all timestamps are offset by 86400. If the timestamp values in the file represent weekseconds, this directive is ignored.
Schema Attributes
Additional Attributes to Expose
Use this parameter to expose Format Attributes in Workbench when you create a workspace:
- In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
- In a non-dynamic scenario where you have multiple feature types, it is convenient to expose additional attributes using this one parameter. For example, if you have ten feature types and want to expose the same attribute in each one, it is easier to define it once than it is to set each feature type individually in the workspace.
Use Search Envelope
Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned.
If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.
Clip to Search Envelope
When selected, this parameter removes any portions of imported features being read that are outside the Search Envelope.
The example below illustrates the results of the Search Envelope when Clip to Search Envelope is not selected (set to No) and when it is selected (set to Yes).
- No: Any features that cross the search envelope boundary will be read, including the portion that lies outside of the boundary.
- Yes: Any features that cross the search envelope boundary will be clipped at the boundary, and only the portion that lies inside the boundary will be read. The underlying function for the Clip to Search Envelope function is an intersection; however, when Clip to Search Envelope is selected, a clipping operation is also performed in addition to the intersection.
