Select polygons that overlap with other polygons within a single feature class
3
$begingroup$
I am running a script to identify polygons that overlap with other polygons within the same layer. I have managed to do this with the code below but the problem is that it is very slow (about 3 seconds per feature).
Is there anything I can do to improve its performance?
arcpy.CreateFeatureclass_management("results.gdb", "Overlapping_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Overlapping_Polygons", "lyr_Overlapping_Polygons")
arcpy.CreateFeatureclass_management("results.gdb", "Remaining_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Remaining_Polygons", "lyr_Remaining_Polygons")
arcpy.CreateFeatureclass_management("in_memory", "row", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("row", "lyr_row")
arcpy.AddSpatialIndex_management("lyr_existing_cadastre")
with arcpy.da.SearchCursor("lyr_existing_cadastre", ["OBJECTID"]) as search_cursor:
for row in search_cursor:
log("t {}".format(row[0]))
# Get the OBJECTID of row and use it to select row
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "NEW_SELECTION", ""OBJECTID" = " + str(row[0]))
# Copy row into a new feature class called row
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# Remove row from the input
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
# Select all features that intersect with row and copy them into the row feature class
arcpy.SelectLayerByLocation_management("lyr_existing_cadastre", "WITHIN", "lyr_row", selection_type="NEW_SELECTION")
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# If there is more than one feature in the row feature class
# meaning there was something else in addition to row then delete those overlaps
# from the input and append everything in row into the output feature class
if (int(arcpy.GetCount_management("lyr_row").getOutput(0)) > 1):
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
arcpy.Append_management("lyr_row", "lyr_Overlapping_Polygons", "NO_TEST")
else:
arcpy.Append_management("lyr_row", "lyr_Remaining_Polygons", "NO_TEST")
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "CLEAR_SELECTION")
arcpy.TruncateTable_management("lyr_row")
del search_cursor
python performance arcpy
edited 9 mins ago
200_success
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
3
$begingroup$
I am running a script to identify polygons that overlap with other polygons within the same layer. I have managed to do this with the code below but the problem is that it is very slow (about 3 seconds per feature).
Is there anything I can do to improve its performance?
arcpy.CreateFeatureclass_management("results.gdb", "Overlapping_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Overlapping_Polygons", "lyr_Overlapping_Polygons")
arcpy.CreateFeatureclass_management("results.gdb", "Remaining_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Remaining_Polygons", "lyr_Remaining_Polygons")
arcpy.CreateFeatureclass_management("in_memory", "row", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("row", "lyr_row")
arcpy.AddSpatialIndex_management("lyr_existing_cadastre")
with arcpy.da.SearchCursor("lyr_existing_cadastre", ["OBJECTID"]) as search_cursor:
for row in search_cursor:
log("t {}".format(row[0]))
# Get the OBJECTID of row and use it to select row
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "NEW_SELECTION", ""OBJECTID" = " + str(row[0]))
# Copy row into a new feature class called row
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# Remove row from the input
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
# Select all features that intersect with row and copy them into the row feature class
arcpy.SelectLayerByLocation_management("lyr_existing_cadastre", "WITHIN", "lyr_row", selection_type="NEW_SELECTION")
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# If there is more than one feature in the row feature class
# meaning there was something else in addition to row then delete those overlaps
# from the input and append everything in row into the output feature class
if (int(arcpy.GetCount_management("lyr_row").getOutput(0)) > 1):
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
arcpy.Append_management("lyr_row", "lyr_Overlapping_Polygons", "NO_TEST")
else:
arcpy.Append_management("lyr_row", "lyr_Remaining_Polygons", "NO_TEST")
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "CLEAR_SELECTION")
arcpy.TruncateTable_management("lyr_row")
del search_cursor
python performance arcpy
edited 9 mins ago
200_success
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
3
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
2
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago
add a comment |
3
3
3
$begingroup$
I am running a script to identify polygons that overlap with other polygons within the same layer. I have managed to do this with the code below but the problem is that it is very slow (about 3 seconds per feature).
Is there anything I can do to improve its performance?
arcpy.CreateFeatureclass_management("results.gdb", "Overlapping_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Overlapping_Polygons", "lyr_Overlapping_Polygons")
arcpy.CreateFeatureclass_management("results.gdb", "Remaining_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Remaining_Polygons", "lyr_Remaining_Polygons")
arcpy.CreateFeatureclass_management("in_memory", "row", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("row", "lyr_row")
arcpy.AddSpatialIndex_management("lyr_existing_cadastre")
with arcpy.da.SearchCursor("lyr_existing_cadastre", ["OBJECTID"]) as search_cursor:
for row in search_cursor:
log("t {}".format(row[0]))
# Get the OBJECTID of row and use it to select row
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "NEW_SELECTION", ""OBJECTID" = " + str(row[0]))
# Copy row into a new feature class called row
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# Remove row from the input
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
# Select all features that intersect with row and copy them into the row feature class
arcpy.SelectLayerByLocation_management("lyr_existing_cadastre", "WITHIN", "lyr_row", selection_type="NEW_SELECTION")
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# If there is more than one feature in the row feature class
# meaning there was something else in addition to row then delete those overlaps
# from the input and append everything in row into the output feature class
if (int(arcpy.GetCount_management("lyr_row").getOutput(0)) > 1):
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
arcpy.Append_management("lyr_row", "lyr_Overlapping_Polygons", "NO_TEST")
else:
arcpy.Append_management("lyr_row", "lyr_Remaining_Polygons", "NO_TEST")
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "CLEAR_SELECTION")
arcpy.TruncateTable_management("lyr_row")
del search_cursor
python performance arcpy
edited 9 mins ago
200_success
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I am running a script to identify polygons that overlap with other polygons within the same layer. I have managed to do this with the code below but the problem is that it is very slow (about 3 seconds per feature).
Is there anything I can do to improve its performance?
arcpy.CreateFeatureclass_management("results.gdb", "Overlapping_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Overlapping_Polygons", "lyr_Overlapping_Polygons")
arcpy.CreateFeatureclass_management("results.gdb", "Remaining_Polygons", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("results.gdb/Remaining_Polygons", "lyr_Remaining_Polygons")
arcpy.CreateFeatureclass_management("in_memory", "row", "POLYGON", "lyr_existing_cadastre", "DISABLED", "DISABLED", arcpy.Describe("lyr_existing_cadastre").spatialReference)
arcpy.MakeFeatureLayer_management("row", "lyr_row")
arcpy.AddSpatialIndex_management("lyr_existing_cadastre")
with arcpy.da.SearchCursor("lyr_existing_cadastre", ["OBJECTID"]) as search_cursor:
for row in search_cursor:
log("t {}".format(row[0]))
# Get the OBJECTID of row and use it to select row
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "NEW_SELECTION", ""OBJECTID" = " + str(row[0]))
# Copy row into a new feature class called row
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# Remove row from the input
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
# Select all features that intersect with row and copy them into the row feature class
arcpy.SelectLayerByLocation_management("lyr_existing_cadastre", "WITHIN", "lyr_row", selection_type="NEW_SELECTION")
arcpy.Append_management("lyr_existing_cadastre", "lyr_row", "NO_TEST")
# If there is more than one feature in the row feature class
# meaning there was something else in addition to row then delete those overlaps
# from the input and append everything in row into the output feature class
if (int(arcpy.GetCount_management("lyr_row").getOutput(0)) > 1):
arcpy.DeleteFeatures_management("lyr_existing_cadastre")
arcpy.Append_management("lyr_row", "lyr_Overlapping_Polygons", "NO_TEST")
else:
arcpy.Append_management("lyr_row", "lyr_Remaining_Polygons", "NO_TEST")
arcpy.SelectLayerByAttribute_management("lyr_existing_cadastre", "CLEAR_SELECTION")
arcpy.TruncateTable_management("lyr_row")
del search_cursor
python performance arcpy
python performance arcpy
edited 9 mins ago
200_success
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 9 mins ago
200_success
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 9 mins ago
200_success
129k15153415
edited 9 mins ago
200_success
129k15153415
edited 9 mins ago
200_success
129k15153415
129k15153415
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
asked 16 hours ago
Bhekani KhumaloBhekani Khumalo
213
213
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Bhekani Khumalo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
3
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
2
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago
add a comment |
3
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
2
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago
3
3
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
2
2
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago
add a comment |
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3
$begingroup$
Welcome to Code Review! The current question title, which states your concerns about the code, is too general to be useful here. Please edit to the site standard, which is for the title to simply state the task accomplished by the code. Please see How to get the best value out of Code Review: Asking Questions for guidance on writing good question titles.
$endgroup$
– Toby Speight
16 hours ago
2
$begingroup$
Thank you. I have made the edits. I hope it's better now.
$endgroup$
– Bhekani Khumalo
16 hours ago