Error when running Extract by Mask Script

Question

I am using ArcGIS 10.3 Desktop to write a script tool to, among other things, extract raster data using a mask.

I keep getting these errors:

ExecuteError: ERROR 000875: Output raster: C:\Users02183940\Documents\Thesis_Data\soil_data\Calculated_Rasters\IL_rasters.gdb\Extract_ph_s1's workspace is an invalid output workspace. ERROR 000581: Invalid parameters. Failed to execute (ExtractByMask).

My code:

import arcpy
from arcpy import env
from arcpy.sa import *
arcpy.env.overwriteOutput = True
ebm_in_raster = r'C:\Users\a02183940\Documents\Thesis_Data\soil_data\Calculated_Rasters\ph_statsgo'
ebm_mask_data = r'C:\Users\a02183940\Documents\Thesis_Data\Cropland_Data_Layer\noda_1_10-15'
arcpy.CheckOutExtension("Spatial")
env.workspace ='C:\Users\a02183940\Documents\Thesis_Data\soil_data\Calculated_Rasters\IL_rasters.gdb'
outExtractByMask = ExtractByMask(ebm_in_raster, ebm_mask_data)
outExtractByMask.save('C:\Users\a02183940\Documents\Thesis_Data\soil_data\Calculated_Rasters\ph_in_crl')

What are the requirements for a valid output workspace for this tool? I don't think it is an issue of raster name length or use of unsupported characters as I've tried a few different things and none of them have worked.

• Aaron: What format are your input data (i.e. ebm_in_raster and ebm_mask_data)?
• Delonix R.: Can you try changing the dash to underscore at the mask filename?
• Neil: The input raster and mask raster are both in grid format. It looks like you recommend using .img instead? I'll try that.

Answer 1

There is no need to define the workspace if you are explicitly defining the variable paths. Additionally, you are formatting the paths incorrectly--try using r'C:\path\to\your\data'.

I would recommend writing the output raster to .tif or .img format. As your script is currently configured, it is trying to output a grid format raster.

This is how I would write the script:

import arcpy
from arcpy import env
from arcpy.sa import *
arcpy.CheckOutExtension("Spatial")
arcpy.env.overwriteOutput = True
ebm_in_raster = r'C:\path\to\in_raster.img' # Assuming a .img source raster
ebm_mask_data = r'C:\path\to\mask_data.img' # Assuming a .img mask
outExtractByMask = ExtractByMask(ebm_in_raster, ebm_mask_data)
outExtractByMask.save(r'C:\path\to\output_raster.img')