How to use defined parameters in a tool ?

CARMETSandrine

I'm very new at python, and I don't understand how to use the defined parameters in the source code of the tool.

I'm trying to create a tool (with clip and contour tools) who can be used by any user (not specified folders or classes). My script is in attachment.

Can somebody take a look ? :S

Thanks

clip_contour.py.zip

XanderBakker

To get you started, have a look at the code below. Use this script by adding it as a script to a new toolbox.

Define the 5 parameters as explained on line 18 - 22

#-------------------------------------------------------------------------------
# Name:        clip_contour.py
# Purpose:     clip raster and create contours
#
# Author:      Sandrine Carmet
#
# Created:     08/08/2014
#-------------------------------------------------------------------------------

class LicenseError(Exception):
    pass

def main():
    import arcpy
    import os

    # read the parameters
    fc_extent = arcpy.GetParameterAsText(0) # define as featurelayer, filter polygon, direction input
    ras_in = arcpy.GetParameterAsText(1) # define as rasterlayer, direction input
    ras_clip = arcpy.GetParameterAsText(2) # define as raster dataset, direction output
    fc_contour = arcpy.GetParameterAsText(3) # define as featureclass, direction output
    interval = arcpy.GetParameter(4) # define as Double, set min and max range, provide default

    # configuration of contours
    contour_interval = interval # not 4...
    base_contour = 0
    z_factor = 1

    try:
        if arcpy.CheckExtension("3D") == "Available":
            arcpy.CheckOutExtension("3D")
        else:
            # raise exception
            raise LicenseError

        # set in memory workspace
        arcpy.env.workspace = "IN_MEMORY"


        # Determine the extent of the fc
        extent = arcpy.Describe(fc_extent).extent
        ext_txt = "{0} {1} {2} {3}".format(extent.XMin, extent.YMin, extent.XMax, extent.YMax)

        # Clip the raster
        arcpy.Clip_management(ras_in, ext_txt, ras_clip, fc_extent, "#", "ClippingGeometry")

        # Create the contours
        arcpy.Contour_3d(ras_clip, fc_contour, contour_interval, base_contour, z_factor)


        # return license
        arcpy.CheckInExtension("3D")

        # outputs are automatically added to the TOC...

    except LicenseError:
        print("3D Analyst license is unavailable")
    except arcpy.ExecuteError:
        print(arcpy.GetMessages(2))

if __name__ == '__main__':
    main()

Once you run the script successfully, you can go to the Results windows and see the syntax for executing the script.

# Replace a layer/table view name with a path to a dataset (which can be a layer file) or create the layer/table view within the script
# The following inputs are layers or table views: "pols", "DEMsmpro"
arcpy.ClipRasterCreateContours("pols","DEMsmpro","D:/Xander/grd/test_clip","D:/Xander/tmp/test2.gdb/test_contours","50")

You could create another script that simply executes this script or change the script to work with a list of inputs.

Kind regards, Xander