topic Re: passing the output of a tool as input to another in Python Questions

passing the output of a tool as input to another

KONPETROV — Sat, 11 Dec 2021 15:39:36 GMT

Hello I have the following code (its a bit big but very simple), and the problem I am facing is that I cannot pass the raster rcls to the Create Spatially Balanced tool, unless I add it to Table of Contents (lines 32- 42). I am building a new tool, so I don't want to interrupt the proccess by adding something to the Talbe of Contents, cracking my tool to 2 tools. The "values" and "num_pnts" variable (line 13-14) show the number of points that will be created. Thanks in advance.

import arcpy
import os
from arcpy import env
from arcpy.sa import *


#workspace = arcpy.GetParameterAsText(0)
workspace = "C:/Results/ArcMap/Visibility/Calc_View/"


# arithmos simion kai viewsheds
#value = arcpy.GetParameterAsText(1)
values = 2
num_pnts = int(values)


#height_val = arcpy.GetParameterAsText(2)
height_val = 100
height = int(height_val)


#demodel = arcpy.GetParameterAsText(3)
#demMAXResult = arcpy.GetRasterProperties_management(demodel, "MAXIMUM")
#demMAXResult = arcpy.GetRasterProperties_management(demodel, "MINIMUM")
demMAXResult = arcpy.GetRasterProperties_management("C:/Results/ArcMap/Visibility/Calc_View/tin2ras3g_1", "MAXIMUM")
demMINResult = arcpy.GetRasterProperties_management("C:/Results/ArcMap/Visibility/Calc_View/tin2ras3g_1", "MINIMUM")
demMAX = demMAXResult.getOutput(0)
demMIN = demMINResult.getOutput(0)
LIMIT = float(demMAX) - height


# Reclassify
outReclass = Reclassify("tin2ras3g_1", "Value", RemapRange([[float(demMIN),LIMIT,1],[LIMIT,demMAX,0]]), "NODATA")
outReclass.save("C:/Results/ArcMap/Visibility/Calc_View/rcls")

n = 0
for i in range(num_pnts):
    n += 1
    # Spatially Balanced Points
    inRaster = "rcls"
    outPoints = "C:/Results/ArcMap/Visibility/Calc_View/point" + str(n)
    arcpy.CreateSpatiallyBalancedPoints_ga(inRaster, 1, outPoints)

Re: passing the output of a tool as input to another

Luke_Pinner — Wed, 16 Dec 2015 03:53:36 GMT

The help (ArcGIS Help (10.2, 10.2.1, and 10.2.2) ) states the 1st parameter "in_probability_raster" should be a Raster Layer or a Mosaic Layer, not a Raster Dataset.

When you add the Raster Dataset to the TOC, you create a Raster Layer which works in the tool.

Try creating a Raster Layer with the Make Raster Layer (Data Management) tool and pass that as the "in_probability_raster" parameter.

Re: passing the output of a tool as input to another

NeilAyres — Wed, 16 Dec 2015 06:09:37 GMT

Here inRaster is just a string.

# Spatially Balanced Points
    inRaster = "rcls"  
    outPoints = "C:/Results/ArcMap/Visibility/Calc_View/point" + str(n)  
    arcpy.CreateSpatiallyBalancedPoints_ga(inRaster, 1, outPoints)

Why not just use your raster object outReclass.

Re: passing the output of a tool as input to another

KONPETROV — Wed, 16 Dec 2015 10:37:07 GMT

Neil I also tried to put

inRaster = "outReclass"

....

but with no result.

Re: passing the output of a tool as input to another

KONPETROV — Wed, 16 Dec 2015 11:11:45 GMT

I tried it your way but although I put again workspace = ... and the makeRasterLayer_management("rcls", "rclsLayer, "") I get only an

Parameters are not valid. ERROR 000865: Input raster: rcls does not exist. Failed to execute (MakeRasterLayer).

The code after the reclassification can run only if I put rcls to the table of contents, something influences that but I don't know why?

Re: passing the output of a tool as input to another

KONPETROV — Wed, 16 Dec 2015 11:56:22 GMT

Problem solved at line 40 at the variable inRaster, it must be imported the path of the reclassified raster like that:

inRaster = "C:/Results/ArcMap/Visibility/Calc_View/rcls"

I don't know why, it is the first time I am doing it, but only by that it works.

Re: passing the output of a tool as input to another

NeilAyres — Wed, 16 Dec 2015 15:25:49 GMT

Kon,

here you are assigning the variable inRaster to the string "outReclass"

Not the raster object which is outReclass.

But yes, you can save it and put the full pointer to it, as you have indicated.