topic Re: Add a topology and its associated layers to a map document with a python script in Python Questions

Add a topology and its associated layers to a map document with a python script

marisavallve — Thu, 15 May 2014 16:38:15 GMT

I would like to add a topology and its associated layers to a map document with a python script (the script does many things and at the end I want it to load the layers to the mxd). When I try to use

arcpy.MakeFeatureLayer_management (topology_layer,feature_layer)
lyrLayer = arcpy.mapping.Layer(feat_layer)
arcpy.mapping.AddLayer(df,lyrLayer, "TOP")

it says:
ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Features: Dataset \\dbs\DBS_ntdisk\tiger10\gdb\geo065.gdb\Tiger10\ed15_topology does not exist or is not supported

What type of layer is the topology? how can I add it to the current mxd?
Thanks!

Re: Add a topology and its associated layers to a map document with a python script

MikeMacRae — Thu, 15 May 2014 16:53:38 GMT

Is the location of your topology password protected? Try setting your workspace environment first:

arcpy.env.workspace

Also, is 'feature_layer' and 'feat_layer' the same thing? If so, you making use of

arcpy.mapping.MakeFeatureLayer

and

arcpy.mapping.Layer

twice which is a little redundant.

You should be fine just using the later without the former.

Re: Add a topology and its associated layers to a map document with a python script

marisavallve — Thu, 15 May 2014 17:06:00 GMT

Thank you for your answer.

Well no ... feat_class and feat_layer are two different things:

feat_class ="\\\\dbs\\DBS_ntdisk\\tiger10\\gdb\\geo065.gdb\\Tiger10\\ed15_topology"
feat_layer = "ed_topology"
symbologyLayer ="\\\\dbs\\DBS_ntdisk\\tiger10\\Symbology_LayerFiles\\ed_topology.lyr"

arcpy.MakeFeatureLayer_management(feat_class,feat_layer) ####This cannot create a layer from a topology layer..
so nothing works after this ...
arcpy.ApplySymbologyFromLayer_management(feat_layer,symbologyLayer)
lyrLayer = arcpy.mapping.Layer(feat_layer)
arcpy.mapping.AddLayer(df,lyrLayer, "TOP")

**** So this works for any feature class but not for topology. So I don't know how to add topology to my mxd with python... yet ...

Re: Add a topology and its associated layers to a map document with a python script

MathewCoyle — Sat, 11 Dec 2021 19:35:08 GMT

You have to save it as a layer file, create a layer object from the file, then add it.

Example

import arcpy

topology_path = 'path1'
layerfile_path = 'path2'

mxd = arcpy.mapping.MapDocument('current')
df = arcpy.mapping.ListDataFrames(mxd)[0]
layer = arcpy.mapping.Layer(layerfile_path)
arcpy.mapping.AddLayer(df, layer)

Edit: disregard, this method does not work natively. It only works if you have already saved the topology as a layer file.

Re: Add a topology and its associated layers to a map document with a python script

Geography — Wed, 30 Jul 2014 12:31:59 GMT

It appears that I ran into the same question. Did you figure out how to do it using arcpy?