topic Re: Creating fishnet using a template in Python Questions

Creating fishnet using a template

JasmineSpring — Thu, 05 Oct 2023 02:41:35 GMT

Hello

I need some help to work out how to configure create fishnet using a template specified in the parameter of a script tool to create a 2m grid. Im not sure how to get the x and Y values from the template. Thank you for your help its very apprecaited

Output1 = arcpy.GetParameterAsText(0) Input1 = arcpy.GetParameterAsText(1) arcpy.management.CreateFishnet(Output1,"","" , '2', '2',None,None,"", "NO_LABELS", Input 1, "POLYGON")

Re: Creating fishnet using a template

DanPatterson — Thu, 05 Oct 2023 07:42:46 GMT

why not add another parameter and set its default value

size - arcpy.GetParameterAsText(2)

arcpy.management.CreateFishnet(Output1,"","" , size, size,None,None,"", "NO_LABELS", Input 1, "POLYGON")

Re: Creating fishnet using a template

JasmineSpring — Fri, 06 Oct 2023 03:21:41 GMT

The size is ok because it is always 2m. It is using the template (another layer) set as a parameter that is the issue when its scripted in python. I get the following error.

thank you so much!

Re: Creating fishnet using a template

DanPatterson — Fri, 06 Oct 2023 21:04:31 GMT

It looks like you have to get the origin from the template featureclass then

Re: Creating fishnet using a template

JasmineSpring — Fri, 20 Oct 2023 03:11:44 GMT

This is the solution I used in the end

desc = arcpy.Describe(Templatelayer) arcpy.CreateFishnet_management(Grid_layer,str(desc.extent.lowerLeft),str(desc.extent.XMin) + " " + str(desc.extent.YMax),"2","2",None,None,str(desc.extent.upperRight),"NO_LABELS","#","POLYGON")

. Thank you for your help

Re: Creating fishnet using a template

NickAtEsriAU — Mon, 22 Jul 2024 04:06:55 GMT

Hi @JasmineSpring ,

Sorry I am very late to this and know its solved but a similar solution from me. I am only interested in making 2 rows and 4 columns but here is the code for what it is worth.

import arcpy import os wksp = r"Insert workspace here" in_md = "Insert name of input dataset" out_fc = "Insert name output feature class" arcpy.env.workspace = wksp # Create a fishnet grid desc = arcpy.Describe(in_md) xmin = desc.extent.XMin xmax = desc.extent.XMax ymin = desc.extent.YMin ymax = desc.extent.YMax point_origin = f'{xmin} {ymin}' point_yaxis = f'{xmin} {ymax}' arcpy.CreateFishnet_management(out_feature_class=out_fc, origin_coord=point_origin, y_axis_coord=point_yaxis, number_rows="2", number_columns="4", labels="NO_LABELS", template=in_md, geometry_type="POLYGON")

Cheers,

Nick