Switch places of X and Y coordinates in polygon feature dataset

Question

Hello.
I need to transform coordinate represetnation of polygon feature dataset. This shapefile was created with some unknown software and its data represented like mirror-transformed.

Please help.. Thank you 🙂

JamesHood · Answer

In the event that you don't have ArcGIS 10.0,  I have your code + tool bar tool I promised.

I asked a friend if he would help me in figuring out some code,  and he  just created it for me so it all works out in the end!

Attached is a .zip file called "JIMCODE"...  
Inside there is a file  JIM.mxd. 
Open the .mxd.
Load your backwards Polygon file.

Go to the toolbox / Samples / Conversion / Data management / Write Features to Data File tool.

Input your polygon and save the text to your workspace.

THEN,  click on the JIM tool at the bottom of your standard ESRI toolbar...  (Thats why you had to load this mxd,  because I don't know how to make it a free standing tool.  My friend did all the work)

Using the JIM tool, input your newly created txt file, and the tool will output an output text file into the same workspace directory.

Finally,  go back to the toolbox, and use the reverse  tool : "create features from text file" and select the newly created text file.

I don't know how to load the JIM Tool into a model,  but if you could,  that would be the slickest coordinate switcher ever.

Also,  I apologize that every thing is named JIM,  I should have specified to my friend, what we were doing with this thing... plus I never asked him to write it but since I don't know VBA,  I couldn't say no after the fact.

So now you have  lots of help.  Hopefully one of them works!

Let us know!

- JIM

JIM_CODE.zip

StevenLambert · Answer

This may be easier...# -------------------------------------------------------------------------
#Tool Name:            Polygon_Mirror
#Source Name:          Polygon_mirror.py
# ESRI SW Version:     ArcGIS 10.0
# Application Version  1.0
#Author:               Steven R. Lambert, ESRI, Inc.
#
#Revision(s):          Version 1.0  Date:   August 03, 2010
#
# Input: Polygon feature class whise X,Y coordinates are to be reversed
#        (Supports multipart polygon features)
# Output: Polygon featureclass with X,Y coordinates reversed
#
# -------------------------------------------------------------------------

# Import system modules

import arcpy
import sys
import os
import traceback
import string

def Reverse_XY(infc, outfc):

# Reverses the X,Y coordianates of a polygon feature class (mirrors)

# Test to see in infc & outfc exist

if not arcpy.Exists(infc):
        AddMsgAndPrint("Input feature class not found")
        return

if not arcpy.Exists(outfc):
        AddMsgAndPrint("Output feature class does not exists")
        return

# Define cursors for input & output

mrows = arcpy.SearchCursor(infc)
    mrow = mrows.next()
    
    fcrows = arcpy.InsertCursor(outfc)
    fcrow = fcrows.next()

AddMsgAndPrint("Cursors Created...")

# Update progress info in dialog box

arcpy.SetProgressor("default")
    result = arcpy.GetCount_management(infc)
    count = int(result.getOutput(0))
    fcount = 0

AddMsgAndPrint("Progressor Created...")

# Create temporary geometry objects

aPoly_Array = arcpy.Array()
    aPt = arcpy.Point()
    rPt = arcpy.Point()

# For each discrete feature in the source feature set

shapefieldname = arcpy.gp.Describe(infc).ShapeFieldName

while mrow:
        fcount += 1
        partnum = 0
        aPoly = mrow.getValue(shapefieldname)
        partcount = aPoly.partCount

# Update progressor message

progressMessage = "Processing source feature: " + str(fcount) + " of " + str(count)
        arcpy.SetProgressorLabel(progressMessage)
        
        while partnum < partcount:
            part = aPoly.getPart(partnum)
            aPt = part.next()
            while aPt:
                rPt.X, rPt.Y = aPt.Y, aPt.X
                aPoly_Array.append(rPt)
                aPt = part.next()
            rPoly = fcrows.newRow()
            rPoly.Shape = aPoly_Array
            fcrows.insertRow(rPoly)
            partnum += 1
            aPoly_Array.removeAll()
        
        mrow = mrows.next()      
    
    return

def AddMsgAndPrint(message):
    arcpy.AddMessage(message)
    print message
    return 0

#
#+-------------------------------------------------------------------------------------+
#                                      Main Process Loop
#+-------------------------------------------------------------------------------------+

# Create the Geoprocessor object and set the overwrite setting

arcpy.OverWriteOutput = True

try:

#
# Input Parameters
#
# infc  -   input polygon feature class
# outfc -   output feature class

infc = arcpy.GetParameterAsText(0)
    outfc = arcpy.GetParameterAsText(1)

Reverse_XY(infc, outfc)

AddMsgAndPrint("Polygon mirroring completed...")
  
# Done

except arcpy.ExecuteError:

# Get the geoprocessing error messages

msgs = arcpy.GetMessage(0)
    msgs += arcpy.GetMessages(2)

# Return gp error messages for use with a script tool

arcpy.AddError(msgs)

# Print gp error messages for use in Python/PythonWin

print msgs

except:

# Get the traceback object
    #
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]

# Concatenate information together concerning the error into a 
    #   message string
    #
    pymsg = tbinfo + "
" + str(sys.exc_type)+ ": " + str(sys.exc_value)

# Return python error messages for use with a script tool
    #
    arcpy.AddError(pymsg)

# Print Python error messages for use in Python/PythonWin
    #
    print pymsg

StevenLambert · Answer

Paying it forward.....Try this.....

# -------------------------------------------------------------------------
#Tool Name:            Polygon_Mirror
#Source Name:          Polygon_mirror.py
# ESRI SW Version:     ArcGIS 10.0
# Application Version  1.0
#Author:               Steven R. Lambert, ESRI, Inc.
#
#Revision(s):          Version 1.0  Date:   August 03, 2010
#
# Input: Polygon feature class whise X,Y coordinates are to be reversed
#        (Supports multipart polygon features)
# Output: Polygon featureclass with X,Y coordinates reversed
#
# -------------------------------------------------------------------------

# Import system modules

import arcpy
import sys
import os
import traceback
import string

def Reverse_XY(infc, outfc):

# Reverses the X,Y coordianates of a polygon feature class (mirrors)

# Test to see in infc & outfc exist

if not arcpy.Exists(infc):
        AddMsgAndPrint("Input feature class not found")
        return

if not arcpy.Exists(outfc):
        AddMsgAndPrint("Output feature class does not exists")
        return

# Define cursors for input & output

mrows = arcpy.SearchCursor(infc)
    mrow = mrows.next()
    
    fcrows = arcpy.InsertCursor(outfc)
    fcrow = fcrows.next()

AddMsgAndPrint("Cursors Created...")

# Update progress info in dialog box

arcpy.SetProgressor("default")
    result = arcpy.GetCount_management(infc)
    count = int(result.getOutput(0))
    fcount = 0

AddMsgAndPrint("Progressor Created...")

# Create temporary geometry objects

aPoly_Array = arcpy.Array()
    aPt = arcpy.Point()
    rPt = arcpy.Point()

# For each discrete feature in the source feature set

shapefieldname = arcpy.gp.Describe(infc).ShapeFieldName

while mrow:
        fcount += 1
        partnum = 0
        aPoly = mrow.getValue(shapefieldname)
        partcount = aPoly.partCount

# Update progressor message

progressMessage = "Processing source feature: " + str(fcount) + " of " + str(count)
        arcpy.SetProgressorLabel(progressMessage)
        
        while partnum < partcount:
            part = aPoly.getPart(partnum)
            aPt = part.next()
            while aPt:
                rPt.X, rPt.Y = aPt.Y, aPt.X
                aPoly_Array.append(rPt)
                aPt = part.next()
            rPoly = fcrows.newRow()
            rPoly.Shape = aPoly_Array
            fcrows.insertRow(rPoly)
            partnum += 1
            aPoly_Array.removeAll()
        
        mrow = mrows.next()      
    
    return

def AddMsgAndPrint(message):
    arcpy.AddMessage(message)
    print message
    return 0

#
#+-------------------------------------------------------------------------------------+
#                                      Main Process Loop
#+-------------------------------------------------------------------------------------+

# Create the Geoprocessor object and set the overwrite setting

arcpy.OverWriteOutput = True

try:

#
# Input Parameters
#
# infc  -   input polygon feature class
# outfc -   output feature class

infc = arcpy.GetParameterAsText(0)
    outfc = arcpy.GetParameterAsText(1)

Reverse_XY(infc, outfc)

AddMsgAndPrint("Polygon mirroring completed...")
  
# Done

except arcpy.ExecuteError:

# Get the geoprocessing error messages

msgs = arcpy.GetMessage(0)
    msgs += arcpy.GetMessages(2)

# Return gp error messages for use with a script tool

arcpy.AddError(msgs)

# Print gp error messages for use in Python/PythonWin

print msgs

except:

# Get the traceback object
    #
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]

# Concatenate information together concerning the error into a 
    #   message string
    #
    pymsg = tbinfo + "
" + str(sys.exc_type)+ ": " + str(sys.exc_value)

# Return python error messages for use with a script tool
    #
    arcpy.AddError(pymsg)

# Print Python error messages for use in Python/PythonWin
    #
    print pymsg

Add this script to a toolbox, specify 1st parameter as "infc" a Feature Class and 2nd parameter as "outfc" a Feature Class.  Progressor will count down polygons as it reverses......

Let me know if this is what you needed.....Good luck