Geographic Information Systems Asked by Muhammad Qasim on September 6, 2020
I am new to Python programming.
How do I check the intersection of two shapefiles using ArcPy?
If the shapefiles intersect, it should return True
else False
.
Below is the code that I have written :
import arcpy
arcpy.env.workspace = "D:/Qasim/mn_corcoran"
arcpy.Intersect_analysis(r'D:/Qasim/mn_hopkins/abc.shp #;D:/Qasim/mn_corcoran/xyz.shp #', r'D:/Qasim/mn_hopkins/asd.shp', 'ALL', '#', 'INPUT')
if arcpy.Intersect_analysis == True:
print("True")
else: arcpy.Intersect_analysis == False
print("False")
You can "catch" the result object returned by Intersect.
For example:
import arcpy
arcpy.env.workspace = r'C:shapefile_folder'
result = arcpy.Intersect_analysis(["ak_riks.shp","ak_riks_Dissolve.shp"],r'in_memoryintersection')
And then use getMessages():
result.getMessages()
u'Executing: Intersect "ak_riks #;ak_riks_Dissolve #" in_memoryintersection ALL # INPUTnStart Time: Mon Aug 31 12:32:47 2020nReading Features...nCracking Features...nAssembling Features...nWARNING 000117: Warning empty output generated.nSucceeded at Mon Aug 31 12:32:47 2020 (Elapsed Time: 0,14 seconds)'
'empty output' not in result.getMessages()
False
Correct answer by BERA on September 6, 2020
You can do it by counting intersect features. If intersect returns some features, then result is True
, else False
. The code can be:
import arcpy
arcpy.env.workspace = "D:/Qasim/mn_corcoran"
intersect_layer = arcpy.Intersect_analysis(r'D:/Qasim/mn_hopkins/abc.shp #;D:/Qasim/mn_corcoran/xyz.shp #',
r'D:/Qasim/mn_hopkins/asd.shp', 'ALL', '#', 'INPUT')
if int(arcpy.GetCount_management(intersect_layer)[0]) > 0:
print("True")
else:
print("False")
Answered by david_p on September 6, 2020
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