How are fieldmap objects used in ArcGIS Pro?
The FieldMappings object is a collection of FieldMap objects, and it is used as the parameter value for tools that perform field mapping, such as Merge. The easiest way to work with these objects is to first create a FieldMappings object, then initialize its FieldMap objects by adding the input feature classes or tables that are to be combined.
How to create a fieldmap object in Java?
The easiest way to work with these objects is to first create a FieldMappings object, then initialize its FieldMap objects by adding the input feature classes or tables that are to be combined. Once all inputs are provided, the FieldMappings object will contain one FieldMap object, or output field, for each unique field name from all the inputs.
How to add field maps to field mappings?
Add a field map to the field mappings. Adds a table to the field mappings object. Exports the object to its string representation. Find a field map within the field mappings by name. Returns a FieldMap object from the FieldMappings object by index position. Restore or update the spatial reference object using a WKT string.
How to merge fields in a fieldmap object?
If a FieldMap object contains multiple input fields from the same table or feature class, each record’s values are merged using the mergeRule property. This is a convenient way to join values, such as a street name that is held in one field and a street type that is held in another, for example, Eureka and Street.
When to map input fields to output fields?
Often, the attributes, or fields, are the same for all the inputs that are used in a merge or append operation; sometimes, however, they do not match, and the relationships between fields of different names and types have to be mapped.
Which is an example of a field mapping?
For an example of field mappings, see the Merge tool in the Data Management toolbox; it facilitates this mapping of relationships so data is placed in the desired output fields with the correct values. The FieldMap object provides a field definition and a list of input fields from a set of tables or feature classes that provide its values.