topic Re: How to find the extent of layer that was created with MakeFeatureLayer in Python Questions

How to find the extent of layer that was created with MakeFeatureLayer

mody_buchbinder — Thu, 29 Apr 2021 05:05:47 GMT

I work in arcpy for ArcMap and do MakeFeatureLayer with some expression.

Then I need to find the extent of this layer.

Describe on the layer name gives the original extent (without the query)

I know I can do a search cursor and union the extent of all features but I would like to avoid it.

I can also do a CopyFeatures but this will create extra layer.

Any other ideas?

Thanks

Re: How to find the extent of layer that was created with MakeFeatureLayer

Tim_McGinnes — Thu, 29 Apr 2021 06:46:48 GMT

For ArcMap, arcpy.mapping.Layer has a method called GetSelectedExtent.

ArcPy - Mapping module - Classes - Layer

For Pro users, unfortunately it does not have this method, but there is a solution here (yes, uses search cursor but does not union so should be fairly quick):

ArcPy.mp Get Selected Features Extent

Re: How to find the extent of layer that was created with MakeFeatureLayer

mody_buchbinder — Sun, 02 May 2021 05:01:24 GMT

The problem is to get the Layer.

After more testing, this looks like it works

arcpy.MakeFeatureLayer_management(r"C:\temp\data.gdb\City","bb","objectid < 10")
lyr = arcpy.mapping.Layer("bb")

lyr.getExtent()