If the first input is a feature class, the output will be a feature class, if the first input is a table, the output will be a table. The output type is determined by the first input. Tables and feature classes can be combined in a single output dataset. For example, several point feature classes can be merged, but a line feature class cannot be merged with a polygon feature class. All input feature classes must be of the same geometry type. Use this tool to combine datasets from multiple sources into a new, single output dataset. name )) # Since both oldStreets and newStreets have field "Distance", no field mapping is required # Use Merge tool to move features into single dataset uptodateStreets = "C:/output/Output.gdb/allroads" arcpy. addFieldMap ( fldMap_streetClass ) # Remove all output fields from the field mappings, except fields "Street_Class", "Street_Name", & "Distance" for field in fieldMappings. outputField = streetClass # Add output field to field mappings object fieldMappings. name = "Street_Class" fldMap_streetClass. addInputField ( newStreets, "IFC" ) # Set name of new output field "Street_Class" streetClass = fldMap_streetClass. addInputField ( oldStreets, "CLASS" ) fldMap_streetClass. addFieldMap ( fldMap_streetName ) # Add input fields "CLASS" & "IFC" into new output field fldMap_streetClass = arcpy. outputField = streetName # Add output field to field mappings object fieldMappings. addInputField ( newStreets, "NM" ) # Set name of new output field "Street_Name" streetName = fldMap_streetName. addInputField ( oldStreets, "STREET_NAM" ) fldMap_streetName. addTable ( newStreets ) # Add input fields "STREET_NAM" & "NM" into new output field fldMap_streetName = arcpy. FieldMappings () # Add all fields from both oldStreets and newStreets fieldMappings. workspace = "C:/data" # Street feature classes to be merged oldStreets = "majorrds.shp" newStreets = "Habitat_Analysis.gdb/futrds" # Create FieldMappings object to manage merge output fields fieldMappings = arcpy. # Name: Merge.py # Description: Use Merge tool to move features from two street # feature classes into a single dataset with field mapping # import system modules import arcpy from arcpy import env # Set environment settings env. You can use the ArcPy FieldMappings class to define this parameter. Count-Find the number of records included in the calculation.Standard deviation-Use the standard deviation classification method on all input fields'.Max-Use the maximum value of all input fields' values.Min-Use the minimum value of all input fields' values.Mode-Use the value with the highest frequency.Median-Calculate the median (middle) of the input fields' values.Mean-Calculate the mean (average) of the input fields' values.Sum-Calculate the total of the input fields' values.Join-Concatenate (join) the input fields' values.First-Use the input fields' first value.There are several merge rules that determine how the output field is populated with values. Input fields are merged or combined into a single output value. Merge rules allow you to specify how values from two or more You can add, rename, or delete output fields as well as set properties, such as data type and merge rule. Syntax Merge_management (inputs, output, ) ParameterĬontrols how the attribute fields from the input datasets are mapped and transferred to the output dataset. Use the Mosaic To New Raster tool to merge multiple rasters into a new output raster. This tool does not support raster datasets. Use the Append Annotation Feature Classes tool to combine annotation feature classes. This tool does not support annotation feature classes. If feature classes are being merged, the output dataset will be in the coordinate system of the first feature class in the Input Datasets list, unless the Output Coordinate System geoprocessing environment is set. To combine, or planarize, feature geometries, use the Union tool. All features from the input datasets will remain intact in the output dataset, even if the features overlap. This tool will not split or alter the geometries from the input datasets. Learn more about mapping fields in scripts For example, several point feature classes can be merged, or several tables can be merged, but a line feature class cannot be merged with a polygon feature class.Īll fields in the output dataset and the contents of those fields can be controlled using the Field Map control. All input datasets must be of the same type. Use the Append tool to combine input datasets with an existing dataset. This tool can combine point, line, or polygon feature classes or tables. Combines multiple input datasets of the same data type into a single, new output dataset.
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