How can I split a road segment every .25 mi and repopulate bmp and emp attributes on the new segments?

[Anonymous User]

All of my road segments have beginning milepost and ending milepost data. What's the best way to split all of my segments into .25mi pieces and repopulate the new beginning and ending milepost data?  

[XanderBakker]

Hi Anthony Von Moos ,

There are a couple of tools out there that will split your line using different methods inside and outside editing sessions, but I don't think it will update your bmp and emp values. See the support page on this topic:

• How To: Split a line into specified distances with a remainder 

You can script this using the segmentAlongLine function in arcpy. Below an example of the logic:

import arcpy

# set you split distance
split_dist = 2.5

# create a simple line
fpnt = arcpy.Point(0, 0)
tpnt = arcpy.Point(10.5, 0)
sr = arcpy.SpatialReference(102100)
line = arcpy.Polyline(arcpy.Array([fpnt, tpnt]), sr)

# split the line
dist = 0
endprev = 0
cnt = 0
while dist <= line.length:
    cnt += 1
    bmp = endprev
    linep =  line.segmentAlongLine(dist, dist + split_dist, False)
    emp = dist + linep.length
    print("line {}".format(cnt))
    print(" - bmp {}".format(bmp))
    print(" - emp {}".format(emp))
    endprev = emp
    dist += split_dist‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

This will print:

line 1
 - bmp 0
 - emp 2.5
line 2
 - bmp 2.5
 - emp 5.0
line 3
 - bmp 5.0
 - emp 7.5
line 4
 - bmp 7.5
 - emp 10.0
line 5
 - bmp 10.0
 - emp 10.5‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍