How to set reclassification codes as parameters in python script

Anonymous User

Original User: davisam1

Hi All,
I am working on a python script and I would like the user to be able to change the values that get reclassed.  If I hard code the remap fields into the code then the program does what it is supposed to do but if I put the part of the code ([11,94,0],[95,95,1]) as a string in the parameters then the code runs but doesn't reclass anything.  I've pasted that part of my code below as well as two screengrabs of how I set up the model parameters. 
Does anyone have an example on how to set this up in python (i'm using ArcGIS10) and how to set up the model parameters correctly? 
Thank you for your help in advance.
Amelie

# Set the necessary product code
# import arcinfo


# Import arcpy module
import arcpy
from arcpy import env

# Check out any necessary licenses
arcpy.CheckOutExtension("spatial")

###################### Script arguments

Input_Land_Cover__NLCD_2006_ = arcpy.GetParameterAsText(0)
#Input_Land_Cover__NLCD_2006_ = "D:\\DATA\\NLCD\\nlcd2006_cook" # provide a default value if unspecified

Output_Workspace = arcpy.GetParameterAsText(1)
#Output_Workspace = "D:\\DATA\\DELETE" # provide a default value if unspecified

# Set environment settings
env.workspace = Output_Workspace

Zone_values_you_want_to_shrink__LC_code_ = arcpy.GetParameterAsText(2)
#Zone_values_you_want_to_shrink__LC_code_ = "11" # provide a default value if unspecified

Land_Cover_Code_for_which_you_want_to_extract_distance_measure = arcpy.GetParameterAsText(3)
#Land_Cover_Code_for_which_you_want_to_extract_distance_measure = "[11,94,0],[95,95,1]" # provide a default value if unspecified


####################
# could try this: tmp3 = Reclassify(Int(EucDistance(inR, "", "1000", "")), "VALUE", "0 NODATA", "DATA")

# Process: Reclassify
remap = arcpy.sa.RemapRange([Land_Cover_Code_for_which_you_want_to_extract_distance_measure])
nlcd_ag = arcpy.sa.Reclassify(Input_Land_Cover__NLCD_2006_, "VALUE", remap, "DATA")
out_rc1 = Output_Workspace + "\\out1"
nlcd_ag.save(out_rc1)

[ATTACH=CONFIG]14222[/ATTACH]
[ATTACH=CONFIG]14223[/ATTACH]

Capture2.JPG

Capture.JPG

Anonymous User

Original User: curtvprice

Hi,

I am trying to perform reclassification on a shape file having several attributes[ATTACH=CONFIG]15757[/ATTACH]. I am trying to call this attribute table and "LANDCOVER" column into my python script to perform reclassification.

I am using this python script to perform this:

fc = "D:\Priyanka\Model_tests\Reclassify_LU_Del\LANDUSE4_prj.shp"
fldName = 'LANDCOVER'
def reclass(landcover):
  if landcover in ("Drain", "Lake", "River", "Water Body", "Canal"):
    return "Water"
  elif landcover in ("Green Area", "Open Space"):
    return "Green and Open Space"
  elif landcover in ("Island"):
    return "Miscellaneous"
  elif landcover in ("Others"):
    return "Public Space"
  else:
    return landcover

But, I am getting errors "Invalid Syntax". I am sure that I am doing something wrong but dont know what! It would be great if you can please let me know how to perform reclassification on this attribute table and then incorporate the same to ARC Tool!

Thanks!

To modify field values in a table, you need to use the Calculate Field tool. Fortunately, your nifty function can easily be used there as a code block:

fc = "D:\Priyanka\Model_tests\Reclassify_LU_Del\LANDUSE4_prj.shp"
fldName = 'LANDCOVER'
newFldName = 'LANDCOV1'
arcpy.AddField_management(fc,newFldName,"TEXT") 
arcpy.CalculateField_management(fc,newFldName,"reclass(!%s!)" % fldName, "PYTHON",
"""
def reclass(landcover):
  if landcover in ("Drain", "Lake", "River", "Water Body", "Canal"):
    return "Water"
  elif landcover in ("Green Area", "Open Space"):
    return "Green and Open Space"
  elif landcover in ("Island"):
    return "Miscellaneous"
  elif landcover in ("Others"):
    return "Public Space"
  else:
    return landcover
"""

You can modify this into a script tool by following these instructions in the help:

A quick tour of creating script tools