Skrip python berikut (yang membutuhkan ArcGIS 10.1 atau yang lebih baru) menggunakan arcpy.da
untuk mengambil shapefile sebagai input dan membuat spreadsheet dengan entri untuk setiap simpul di setiap poligon yang ada di .shp (dan saya percaya ini bekerja dengan lisensi arcgis level rendah) . Objek dan urutan id mengikat poin kembali ke posisi tertentu dalam poligon tertentu.
H / t ke @PaulSmith di pos ini: Dapatkan semua poin dari polyline untuk menyorot explode_to_points
opsi dalam arcpy.da.FeatureClassToNumPyArray
alat
import os
import csv
import arcpy
from os import path
from arcpy import da
from arcpy import env
env.overwriteOutput = True
env.workspace = '/folder/containing/your/shp/here'
polygon_shp = path.join(env.workspace, 'your_shapefile_name.shp')
vertex_csv_path = 'your/csv/path/here/poly_vertex.csv'
def getPolygonCoordinates(fc):
"""For each polygon geometry in a shapefile get the sequence number and
and coordinates of each vertex and tie it to the OID of its corresponding
polygon"""
vtx_dict = {}
s_fields = ['OID@', 'Shape@XY']
pt_array = da.FeatureClassToNumPyArray(polygon_shp, s_fields,
explode_to_points=True)
for oid, xy in pt_array:
xy_tup = tuple(xy)
if oid not in vtx_dict:
vtx_dict[oid] = [xy_tup]
# this clause ensures that the first/last point which is listed
# twice only appears in the list once
elif xy_tup not in vtx_dict[oid]:
vtx_dict[oid].append(xy_tup)
vtx_sheet = []
for oid, vtx_list in vtx_dict.iteritems():
for i, vtx in enumerate(vtx_list):
vtx_sheet.append((oid, i, vtx[0], vtx[1]))
writeVerticesToCsv(vtx_sheet)
def writeVerticesToCsv(vtx_sheet):
"""Write polygon vertex information to csv"""
header = (
'oid', 'sequence_id',
'x_coordinate', 'y_coordinate')
with open(vertex_csv_path, 'wb') as vtx_csv:
vtx_writer = csv.writer(vtx_csv)
vtx_writer.writerow(header)
for row in vtx_sheet:
vtx_writer.writerow(row)
getPolygonCoordinates(polygon_shp)
Saya juga menulis skrip yang secara khusus membahas persyaratan: Masukkan titik koordinat dalam poligon yang ditandai sebagai duplikat untuk pertanyaan ini, kode di bawah ini:
import os
import arcpy
from os import path
from arcpy import da
from arcpy import env
from arcpy import management
env.overwriteOutput = True
env.workspace = '/folder/containing/your/shp/here'
polygon_shp = path.join(env.workspace, 'your_shapefile_name.shp')
file_gdb = 'your/file/gdb/path/here/temp.gdb'
def addVerticesAsAttributes(fc):
"""Add the x,y coordinates of vertices as attributes to corresponding
features. The coordinates will be in the order the appear in the geometry"""
polygon_copy = createGdbFcCopy(fc)
vtx_dict = {}
s_fields = ['OID@', 'Shape@XY']
pt_array = da.FeatureClassToNumPyArray(polygon_copy, s_fields,
explode_to_points=True)
for oid, xy in pt_array:
xy_tup = tuple(xy)
if oid not in vtx_dict:
vtx_dict[oid] = [xy_tup]
# this clause ensures that the first/last point which is listed
# twice only appears in the list once
elif xy_tup not in vtx_dict[oid]:
vtx_dict[oid].append(xy_tup)
# find that largest number of points that exist within a polygon to determine
# the number of fields that need to be added to the shapefile
max_vertices = 0
for vtx_list in vtx_dict.values():
if len(vtx_list) > max_vertices:
max_vertices = len(vtx_list)
xy_fields = addXyFields(polygon_copy, max_vertices)
u_fields = ['OID@'] + xy_fields
with da.UpdateCursor(polygon_copy, u_fields) as cursor:
oid_ix = cursor.fields.index('OID@')
for row in cursor:
xy_ix = oid_ix + 1
for vtx in vtx_dict[row[oid_ix]]:
for coord in vtx:
row[xy_ix] = coord
xy_ix += 1
cursor.updateRow(row)
def createGdbFcCopy(fc):
"""Create copy of the input shapefile as a file geodatabase feature class,
because a huge number of fields may be added to the fc this preferable to shp"""
if not arcpy.Exists(file_gdb):
management.CreateFileGDB(path.dirname(file_gdb),
path.basename(file_gdb))
polygon_copy = path.join(file_gdb, 'polygon_shp_copy')
management.CopyFeatures(polygon_shp, polygon_copy)
return polygon_copy
def addXyFields(fc, vtx_count):
"""Add fields to the feature class that will hold the x, y coordinates for each
vertex, the number of fields is twice the number of most vertices in any polygon"""
field_list = []
f_type = 'DOUBLE'
for i in range(1, vtx_count+1):
f_names = ['x{0}'.format(i), 'y{0}'.format(i)]
for fn in f_names:
management.AddField(fc, fn, f_type)
field_list.extend(f_names)
return field_list
addVerticesAsAttributes(polygon_shp)