Generate Table from Select Layer by Location "Count" and "Layer Names" outputs

Anonymous User

Hi,

In ArcGIS Pro 2.3.0 - Model Builder.

I am using the Select Layer By Location geoprocessing tool to make a selection through 9 different feature classes.

The main output is the selection itself, but the tool also generates a table with a list of the layer names for all input feature classes, and also a list for the count of select features within each one of these feature classes.

I would like to create a table output that would contain all the layer names listed in one field, and a second field for the count of selected features against each of these layer names.

Example of table to be generated:

Also, ideally this table could be saved in a gdb workspace.

Please let me know if someone has any suggestions!

D_Hornby_ddh_uni

These appear to be new output parameters for the SelectByLocation tool. A little research identified them to be lists where the values are separated by semicolons.  You can use the Calculate Value tool to write these out to a CSV file as shown below; the output layer names is a precondition to the Calculate Value tool.

 

 

The tool is set up as:

 

 

The Code block would be:

 

 

'''
Description:
    This code will take the output lists created by the SelectByLocation tool in ArcGIS Pro 2.3 and write out the selection results to a CSV file
Usage:
     1] Assumes you have renamed the outputs of the SelectByLocation tool to Output Layer Names and Count
     2] Valid selections are created
     3] You need to change the variable csvPath to where ever you want the CSV file to be written	 
Output:
     1] A CSV file
     2] The output of this tool is a Boolean, if code executes without error this is set to True otherwise False
Author:
    Duncan Hornby (ddh@geodata.soton.ac.uk)
Created:
    14/2/19
'''
import csv,arcpy,sys
def WriteSelectionCounttoCSV(layers,counts):
    try:
        layerList = layers.split(";")
        countList = counts.split(";")
        res = zip(layerList,countList)
        csvPath = r"C:\Scratch\test.csv" # Change this file path to suit your needs
        with open(csvPath, mode='w', newline='') as csvfile:
            writer = csv.writer(csvfile,delimiter=',',quotechar='"',quoting=csv.QUOTE_MINIMAL, dialect='excel')
            writer.writerow(["rowid","count","layer"])
            for i,tup in enumerate(res):
                writer.writerow([i,tup[0],tup[1]])
        arcpy.AddMessage("Data written to CSV file!")
        return True
    except:
	    # An error occurred so return False for the tool so if it is being used as a preconition
		# it can help control the model
        e = sys.exc_info()[0]
        arcpy.AddError(str(e))
        print (str(e))
        return False‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

 

 

The CSV file will have the headers rowid, count and layer with the information you want written out to each row.