topic can a geometry object be used with select layers by location? in ArcGIS API for Python Questions

can a geometry object be used with select layers by location?

ArthurAbbott1 — Sun, 12 Dec 2021 09:46:17 GMT

I am trying to use Select Layers By Location tool in Python.

I have a polygon feature class that I would like to iterate though each feature and do a select layers by location in order to get a list of layers that each polygon intersects with.

Can I use a search cursor to iterate through the polygons and pass the geometry to Select Layers By Location as the select_features parameter?

extents = sys.argv[1]
#polygon shapefile containing 4 polygons

try:
    arcpy.env.workspace = "C:\Dataset.gdb"
    #get extents spatial reference
    ex_sp = arcpy.Describe(extents).spatialReference

    fcs = arcpy.ListFeatureClasses()
    with da.SearchCursor(extents,["SHAPE@"]) as scursor:
        for row in scursor:
            boundary = row[0]
             Output_Layer_Names, Count = arcpy.management.SelectLayerByLocation(in_layer=fcs, overlap_type="INTERSECT", 
                 select_features=boundary, search_distance="", selection_type="NEW_SELECTION",
                 invert_spatial_relationship="NOT_INVERT")
            print(Output_Layer_Names,Count)
except:

Any help is appreciated

Thanks,

Arthur

Re: can a geometry object be used with select layers by location?

DanPatterson — Fri, 02 Oct 2020 19:32:08 GMT

what trackback error did you get when you ran it?

Re: can a geometry object be used with select layers by location?

ArthurAbbott1 — Fri, 02 Oct 2020 19:42:25 GMT

too many values to unpack (expected 2)

I also get the same error if I try creating a new polygon object and passing that in

Re: can a geometry object be used with select layers by location?

DanPatterson — Fri, 02 Oct 2020 20:03:25 GMT

this

fcs = arcpy.ListFeatureClasses()

then this

.... SelectLayerByLocation(in_layer=fcs....,

how many featureclasses are there? perhaps you want the first? slice with ....ListFeatureClasses()[0] perhaps.

It would be easier to reference with code formatting

/blogs/dan_patterson/2016/08/14/script-formatting

and if you dump the try-except block, you will still get real error messages

Also the help topic still says layers are required. You can do geometry intersections using arcpy directly

Re: can a geometry object be used with select layers by location?

JoshuaBixby — Sat, 03 Oct 2020 13:48:51 GMT

Your issue is with this:

Output_Layer_Names, Count = ‍

You are trying to unpack the Result object's outputs, but you haven't given the correct number of variables to unpack into. The following should work:

_, Output_Layer_Names, Count = ‍

Re: can a geometry object be used with select layers by location?

ArthurAbbott1 — Tue, 06 Oct 2020 19:55:45 GMT

Yup, that did it. Thanks.