topic Re: Merge features in Python Questions

Merge features

CCWeedcontrol — Fri, 10 Dec 2021 23:39:43 GMT

I need help getting the merge to work on this script. I currently do not get an error but features don't merge.

I need the features of wp1 Mile and wp2 Mile to merge into one feature but merge based on the Buff_DIST feild, the attributes with "1" will be one and the ones with "2" will be another.

I think the reason why i get 12 features in the mile1_2 is because there is multiple parcels in the SP

the code i am working with. Should i be using a Dissolve and if so how we i use the dissolve with my current code?

distances = ["1 Mile", "2 Mile"]
for distance in distances:
    outfile = "wp%s" % distance  
    arcpy.Buffer_analysis(SP, outfile, distance, "FULL", "ROUND", "", "BUFF_DIST")
    

out = arcpy.env.workspace
lyr = ["wp1 Mile", "wp2 Mile"]
#shplist =  arcpy.ListFeatureClasses(lyr, "Polygon")

arcpy.Merge_management(lyr, os.path.join(out, "mile1_2"))‍‍‍‍‍‍‍‍‍‍‍

Re: Merge features

DanPatterson_Retired — Wed, 09 Nov 2016 21:40:52 GMT

do it manually on a copy of the file...

start with Dissolve—Help | ArcGIS for Desktop

then go to the Using the Results window—Help | ArcGIS for Desktop

and copy the result as a python snippet

You will then have the syntax and know if it will work in code

Re: Merge features

DanPatterson_Retired — Thu, 10 Nov 2016 02:37:10 GMT

some tips on the process

/blogs/dan_patterson/2016/08/31/you-are-not-allowed-to-use-modelbuilder-when-instructors-need-to-get-smarter

/blogs/dan_patterson/2016/08/31/you-are-not-allowed-to-use-geoprocessing-results-the-students-get-smarter

Re: Merge features

LukeWebb — Fri, 10 Dec 2021 23:39:46 GMT

import arcpy


distances = ["1 Mile", "2 Mile"]
for distance in distances:
    outfile = "wp%s" % distance
    arcpy.Buffer_analysis(SP, outfile, distance, "FULL", "ROUND", "", "BUFF_DIST")


out = arcpy.env.workspace
lyr = ["wp1 Mile", "wp2 Mile"]
#shplist =  arcpy.ListFeatureClasses(lyr, "Polygon")

merge_out_path = os.path.join(out, "mile1_2")
arcpy.Merge_management(lyr, merge_out_path)

dissolve_out_path = os.path.join(out, "mile1_2_dissolved")
arcpy.Dissolve_management(merge_out_path, dissolve_out_path,  ["BUFF_DIST"])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

This will give you the geometry you want.

You need to work out how to combine the attributes yourself if needed. (e.g. the features in 1 mile, you have multiple Account Numbers + Pins that you now want to store in 1 row.