topic Convert polyline shapefile to point shapefile using Python in Python Questions

Convert polyline shapefile to point shapefile using Python

FranciNovak — Thu, 28 Aug 2014 08:56:13 GMT

I would like to convert polyline shapefile into point shapefile using Python.

First I shall create a list of polyline points from polyline shapefile and second write point shapefile from previous list.

There is a lot of pieces of code for first and second step apart but not put together.

I think problem is because of list formatting.

1 step:

fc = "polyline.shp"
array = arcpy.Array()

with arcpy.da.UpdateCursor(fc, ("OID@", "SHAPE@")) as curs:
        for point in row [1].getPart(0):
          # Make some points
            point = arcpy.Point(point.X, point.Y)
            # Put the points in the array
            array.add(point)

2 step:

for x, y in array:

point= arcpy.Point(x,y)

pointGeometry = arcpy.PointGeometry(point)

array.append(pointGeometry)

arcpy.CopyFeatures_management(pointGeometry, "point.shp")

I am using Pytohn only sometimes so any help would be appreciated.

Re: Convert polyline shapefile to point shapefile using Python

JakeSkinner — Thu, 28 Aug 2014 11:35:52 GMT

Hi Franci,

Here is an example on how to convert a polyline to a single point using python:

import arcpy
from arcpy import env
env.workspace = r"C:\temp\python\test.gdb"

fc = "railroads"
spatial_ref = arcpy.Describe(fc).spatialReference

pointGeometryList = []

with arcpy.da.SearchCursor(fc, ("OID@", "SHAPE@")) as curs:
        for row in curs:                               
                point = arcpy.Point(row[1].centroid.X, row[1].centroid.Y)
                pointGeometry = arcpy.PointGeometry(point, spatial_ref)
                pointGeometryList.append(pointGeometry)

arcpy.CopyFeatures_management(pointGeometryList, "railroadPoints")

Re: Convert polyline shapefile to point shapefile using Python

FranciNovak — Thu, 28 Aug 2014 12:34:41 GMT

Thank you very much.

This is what I was looking for.

What the beauty of the Python code.

You really are a true master.

I still have to dive a lot into Python.