topic Re: Adding Geometric Network Trace to Map Using ArcPy in Python Snippets Questions

Adding Geometric Network Trace to Map Using ArcPy

BehrouzHosseini — Sun, 12 Dec 2021 09:48:38 GMT

I am able to run Geometric Network Trace by using following ArcPy script but I also need to add Trace result into the map. Can you please let me know how I can add the result(graphic/geometry) to the map.

import arcpy

arcpy.env.workspace = r"E:/Utility/Sample/Montgomery.gdb"
# Local variables:
G_N = "E:/Utility/Sample/Montgomery.gdb/Water/Water_Net"
Flag = "E:/Utility/Sample/Flag.shp"
traceOut = "traceOut_Net"

# Process: Trace Geometric Network
arcpy.TraceGeometricNetwork_management(G_N, traceOut, Flag, "TRACE_UPSTREAM", "", "", "", "", "", "NO_TRACE_ENDS", "", "", "", "AS_IS", "", "", "", "AS_IS")
print "Trace Done"‍‍‍‍‍‍‍‍‍‍‍

Re: Adding Geometric Network Trace to Map Using ArcPy

curtvprice — Thu, 18 May 2017 16:55:26 GMT

See https://community.esri.com/message/678158-select-data-for-pyton?sr=search&searchId=4b3d6cec-d912-482e-aa64-4f34ea45e2a8&searchIndex=0‌

Re: Adding Geometric Network Trace to Map Using ArcPy

BehrouzHosseini — Sun, 12 Dec 2021 09:48:41 GMT

Thanks Curtis'

I updated the code as:

import arcpy

arcpy.env.workspace = r"E:/Utility/Sample/Montgomery.gdb"
# Local variables:
G_N = "E:/Utility/Sample/Montgomery.gdb/Water/Water_Net"
Flag = "E:/Utility/Sample/Flag.shp"
traceOut = "traceOut_Net"

# Process: Trace Geometric Network
arcpy.TraceGeometricNetwork_management(G_N, traceOut, Flag, "TRACE_UPSTREAM", "", "", "", "", "", "NO_TRACE_ENDS", "", "", "", "AS_IS", "", "", "", "AS_IS")

glyr = arcpy.mapping.Layer(traceOut)
# Extract the layer based on a search string
tlyr = [lyr for lyr in arcpy.mapping.ListLayers(glyr)
        if "net" in str(lyr).lower()][0]
# copy out to a feature class
arcpy.CopyFeatures_management(tlyr, tfeat)
print "Trace Done"‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

but I am getting error on

arcpy.CopyFeatures_management(tlyr, tfeat)
‍

can you please let me know what is tfeat ?

Re: Adding Geometric Network Trace to Map Using ArcPy

curtvprice — Thu, 18 May 2017 18:35:16 GMT

That's a variable I did not set in the code sample, sorry, you can set it to whatever you want, for example "trace_feat" would write a feature class to Montgomery.gdb for you.

Re: Adding Geometric Network Trace to Map Using ArcPy

BehrouzHosseini — Thu, 18 May 2017 18:39:27 GMT

Thanks for reply but what exactly do you men by setting? "I did not set in the code sample"

something like

trace_feat = "E:/Utility/Sample/Montgomery.gdb/Water/trace_feat.shp

Re: Adding Geometric Network Trace to Map Using ArcPy

curtvprice — Thu, 18 May 2017 19:02:58 GMT

tfeat = "trace_feat"‍‍

somewhere above the CopyFeatures call will tell CopyFeatures to write to the current arcpy.env.workspace:

E:/Utility/Sample/Montgomery.gdb/Water/trace_feat

Warning, dont' specify .shp for feature classes inside a geodatabase (dots aren't allowed!)

Re: Adding Geometric Network Trace to Map Using ArcPy

BehrouzHosseini — Thu, 18 May 2017 19:24:23 GMT

and now I am getting this error

Re: Adding Geometric Network Trace to Map Using ArcPy

curtvprice — Thu, 18 May 2017 20:04:37 GMT

Post your current script.

Re: Adding Geometric Network Trace to Map Using ArcPy

BehrouzHosseini — Sun, 12 Dec 2021 09:48:43 GMT

Here is the latest:

import arcpy

arcpy.env.workspace = r"E:/Utility/Sample/Montgomery.gdb/Water/Flag_Trace"
# Local variables:
G_N = "E:/Utility/Sample/Montgomery.gdb/Water/Water_Net"
Flag = "E:/Utility/Sample/Montgomery.gdb/Water/Flag"
traceOut = "traceOut_Net"

# Process: Trace Geometric Network
arcpy.TraceGeometricNetwork_management(G_N, traceOut, Flag, "TRACE_UPSTREAM", "", "", "", "", "", "NO_TRACE_ENDS", "", "", "", "AS_IS", "", "", "", "AS_IS")

glyr = arcpy.mapping.Layer(traceOut)
# Extract the layer based on a search string
tlyr = [lyr for lyr in arcpy.mapping.ListLayers(glyr)
        if "net" in str(lyr).lower()][0]
# copy out to a feature class
tfeat = "Flag_Trace"
arcpy.CopyFeatures_management(tlyr, tfeat)
print "Trace Done"‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Adding Geometric Network Trace to Map Using ArcPy

curtvprice — Thu, 18 May 2017 20:12:19 GMT

Look at the contents of "traceOut_Net" in the catalog window and modify the search expression "if "net" in str(lyr).lower()" match what you need to find.