topic How to split an entire roadway network into segments of one mile length in Geoprocessing Questions

How to split an entire roadway network into segments of one mile length

AfridSarker — Thu, 07 Aug 2014 19:18:22 GMT

Hi,

I am working on Identification of Secondary crashes and proposed method is segment based. Following is the scenario:

1. The entire roadway network consists of several thousand links (which are polylines)

2. I used the Split tool under Editor to split a single link but Split command becomes grayed when when I do multiple selection.

I would appreciate any help on this. Thanks !

Re: How to split an entire roadway network into segments of one mile length

BenGrod — Tue, 17 Mar 2015 21:15:22 GMT

One workflow might be to create station points along the line network at 1 mile intervals (using ETGeoTools free functions). That tools outputs the point locations which could then be used to Split Line by Point (Esri ArcCatalog tool). Probably a couple of other ways to tackle this as well, I'm sure the community will chip in, good luck!

Re: How to split an entire roadway network into segments of one mile length

DarrenWiens2 — Fri, 10 Dec 2021 23:32:33 GMT

Arcpy implementation (then Split by Lines):

>>> fc = "YOUR_LAYER_NAME"
... points = []
... step = 2 # map units
... sr = arcpy.Describe(fc).spatialReference
... with arcpy.da.SearchCursor(fc,"SHAPE@", spatial_reference=sr) as cursor:
...    for row in cursor:
...        for i in range(int(row[0].length/step)):
...            point = row[0].positionAlongLine(i*step)
...            points.append(point)
... arcpy.CopyFeatures_management(points, r'in_memory\points')

Re: How to split an entire roadway network into segments of one mile length

DanPatterson_Retired — Wed, 18 Mar 2015 01:28:39 GMT

This has been referenced several times with success... from Arcpy Cafe

EDITs ( by me.... thanks to Darren)

from that link

segmentAlongLine ==>> ArcMap 10.3 arcpy Polyline class, segmentAlongLine

That Arcpy Café link, indicates, somewhat out of sight, and within the comments

Their edit

EDIT: As was pointed out in the comments, the segmentAlongLine is new at 10.3.

Soooo it will or won't solve your problem, depending upon Arcmap version

Re: How to split an entire roadway network into segments of one mile length

DarrenWiens2 — Wed, 18 Mar 2015 05:01:05 GMT

Just a small nit-pick: the method in your link splits lines into x equal lengths, not segments of x length. Subtle difference, and I am sure it has been solved elsewhere, but not there.

Re: How to split an entire roadway network into segments of one mile length

CassidyMacDonald — Fri, 05 Feb 2021 05:07:09 GMT

Hey Darren, I need to split a road network into 100m segments. I encounter problems in the split because ArcGIS pro auto splits the network at nodes. Any chance you can offer some advice?