如何在Python中從一個多邊形移動到另一個多邊形？

Question

shp中有3個多邊形。 文件。

需要找到每個的最小/最大坐標。 接下來我只能做1個：

import arcpy # csv
from arcpy import env

print "Creating and defining variables."
env.workspace = r"C:\Users\Desktop\data"
env.overwriteOutput = 1

theme = 'interestAreas.shp' 
# Look for .next()  in SearchCursor, need a loop
# the same when we read line by line
for i in theme:
    Curs = arcpy.da.SearchCursor(theme, 'SHAPE@').next()
    polygon = Curs[0]
    ext = polygon.extent
del Curs

# Find min X, Y and max X, Y for each polygon and write it to the file:
print 'xmin is: ', ext.XMin
print 'ymin is: ', ext.YMin
print 'xmax is: ', ext.XMax
print 'ymax is: ', ext.YMax
minX = ext.XMin
minY = ext.YMin

如何使用arcpy和loop進行一段時間的循環？ 或如何在多邊形的ID（1,2,3）中移動？

謝謝您的幫助。

Answer 1

我不太習慣python，但是每種語言的邏輯基本相同...您可能應該做類似的事情（可能會有一些小的語法錯誤）：

polygons = arcpy.SearchCursor(theme, 'SHAPE@')
curPolygon = polygons.next()
while Curs:
    polygon = Curs[0]
    ext = polygon.extent

    # Find min X, Y and max X, Y for each polygon and write it to the file:
    print 'xmin is: ', ext.XMin
    print 'ymin is: ', ext.YMin
    print 'xmax is: ', ext.XMax
    print 'ymax is: ', ext.YMax
    minX = ext.XMin
    minY = ext.YMin

    # now look for next polygon description
    curPolygon = polygons.next()

進一步閱讀請點擊這里

Answer 2

您的原始代碼非常接近。 您只需要移動並重新調整for循環即可在光標（而不是shapefile）上進行迭代。 我還建議在游標對象上使用with ，這樣就無需管理它。

import arcpy # csv
from arcpy import env

print "Creating and defining variables."
env.workspace = r"C:\Users\Desktop\data"
env.overwriteOutput = 1

theme = 'interestAreas.shp' 
with arcpy.da.SearchCursor(theme, ['SHAPE@']) as Curs:
    for i in Curs: # iterate through the rows in the cursor object
        polygon = i[0]
        ext = polygon.extent

        # Find min X, Y and max X, Y for each polygon and write it to the file:
        print 'xmin is: ', ext.XMin
        print 'ymin is: ', ext.YMin
        print 'xmax is: ', ext.XMax
        print 'ymax is: ', ext.YMax
        minX = ext.XMin
        minY = ext.YMin