Copying feature from one feature class to another without creating new feature class using ArcGIS Desktop

Question

I am using ArcGIS Desktop.

How do I copy a line feature from a line feature class to another existing feature class without creating a new feature class?

The Copy Features tool creates the copied feature in a new feature class but what I want is to add the feature that will be copied to an existing feature class.

Answer 1

The Append tool:

Appends multiple input datasets into an existing target dataset. Input datasets can be point, line, or polygon feature classes, tables, rasters, raster catalogs, annotation feature classes, or dimensions feature classes.

For one ArcPy example its Help has:

import arcpy
arcpy.env.workspace = "C:/data/"
arcpy.Append_management(["north.shp", "south.shp", "east.shp", "west.shp"], "wholecity.shp", "TEST","","")

If you need only a subset of features from a feature class then precede Append with the Select tool.

Answer 2

Apart from the already cited "insertCursor" and "Append" tools, a simple way to copy one or more features into an existing feature class is to make a copy-paste while in edit mode.

Start an edit session for your target feature class

Select the features that you want to copy

CTRL+C

CTRL+V

save edit

Answer 3

To help qualify the @JamesLevrsha solution I tested his script:

inFC = r'd:\scratch\centres.shp'
outFC = r'd:\scratch\centres_Copy.shp'

searchField = 'CODE'
desiredVal = 'PPA'

searchCur = arcpy.SearchCursor(inFC, fields = searchField)
inCur = arcpy.InsertCursor(outFC)

for sRow in searchCur:
    rowVal = sRow.getValue(searchField)
    print rowVal

    if rowVal == desiredVal:
        row = inCur.newRow()
        row.setValue(searchField, rowVal)
        inCur.insertRow(row)

del sRow,row,inCur,searchCur

on 2 shapefiles, with single field "CODE" populated by single value "PPA". Output feature class (outFC) shown as red points, input FC (inFC) shown as green points:

I run the script and reduced the size of the symbol of green points, so that I can see appended points.

Result:

Why is this happening?

Because as expected the script creates records with NULL geometry. This is how red points table looks like after exporting to file geodatabase feature class and computing coordinates of the points:

As I already mentioned in my comments solution by @JamesLeversha is wrong.

Answer 4

Using an insert cursor would do the trick. If you are using greater than 10.0 then use the da cursors but this code is for 10.0. Code isn't tested.

inFC = 'test.shp'
outFC = 'existing.shp'

inCur = arcpy.InsertCursor(outFC)
searchField = 'BLAH'

searchCur = arcpy.SearchCursor(inFC,fields = searchField)

for sRow in searchCur:
    rowVal = sRow.getValue('BLAH')
    if rowVal == 'DESIRED VALUE':
        row = inCur.newRow()
        row.setValue('BLAH', rowVal)
        inCur.insertRow(row)

del sRow
del row
del inCur
del searchCur

Update to include geometry, and all other fields that are matching in the output FC

import arcpy

inFC = r'test.shp'
outFC = r'testCopy.shp'


searchField = ''
desiredField = 'CODE'
desiredVal = 'PPA'


inOID = arcpy.Describe(inFC).OIDFieldName
outFields = [item.name for item in arcpy.ListFields(outFC)]
inFields = [item.name for item in arcpy.ListFields(inFC) if item.name != inOID]

finalFields = [item for item in inFields if item in outFields]

for item in finalFields:
    searchField += item + ';'
searchField = searchField[:-1]

searchCur = arcpy.SearchCursor(inFC, fields = searchField)
inCur = arcpy.InsertCursor(outFC)

row = None
cursorDict = {}
for sRow in searchCur:
    for item in finalFields:
        cursorDict[item] = sRow.getValue(item)
    if cursorDict[desiredField] == desiredVal:
        row = inCur.newRow()
        for item in finalFields:
            row.setValue(item, cursorDict[item])
        inCur.insertRow(row)

del sRow, row, inCur, searchCur