topic Re: help turning input into user input in arcgis in Python Questions

help turning input into user input in arcgis

bradbrewer — Fri, 10 Nov 2017 20:28:36 GMT

velocity = float(input("Input asteroid velocity: "))
mass = float(input("Input asteroid mass: "))
ice = float(1.8)
iron = float(7.3)
rock = float(2.3)
comp = input("input 1 for ice, 2 for iron, or 3 for rock: ")
grav = float(0.16667)
const = float(0.007)
colrt = float(1.3)
soil = float(2.65)
power = (int(1)/float(3.4))
vel = (velocity * 1000)
kilotons = (4184000000000)
if comp == 1:
comp = ice
elif comp == 2:
comp = iron
elif comp == 3:
comp = rock
kinetic = (0.5 * mass * (vel * vel))
energy = (kinetic * kilotons)
part1 = (const * colrt * grav)
part2 = (comp / soil)
part3 = (energy * part2)
part4 = (part3 ** power)
crater = (part1 * part4)
final = (crater / int(1000))
print(final)

sorry for the length but i'm trying to take the velocity, mass, and comp and turn them into user input parameters that will be run through the equation and then have it spit out a diameter

my problem is trying to set up the user input part to work with my script. i eventually want to take the script add it to model builder and do more with the output of this script.

any help would be greatly accepted

Re: help turning input into user input in arcgis

XanderBakker — Fri, 10 Nov 2017 20:36:29 GMT

Please read the following page: Setting script tool parameters—Help | ArcGIS for Desktop

It will show you how to create a script tool with parameters that can be used in ModelBuilder

Re: help turning input into user input in arcgis

bradbrewer — Fri, 10 Nov 2017 20:38:07 GMT

i can set up the parameters just fine but i cant seem to get them to run in my script

Re: help turning input into user input in arcgis

DanPatterson_Retired — Fri, 10 Nov 2017 21:05:01 GMT

have you check to see the type of object that is returned by 'input' in python?

Have your reported the errors that your script returns?

Re: help turning input into user input in arcgis

XanderBakker — Sat, 11 Dec 2021 18:33:13 GMT

It would have been good to read the help since it mentions exactly what you should do, but ok here goes a more compact explanation.

You can create a new toolbox or use an existing one and add a script:

You will have to add the existing Python script (see further down below):

This is what you configure as parameters:

In the lower part the Filter "Value List" will contain the list of materials:

The 4th parameters is the output and should have that "direction":

When you execute the tool you can enter all the parameters:

And the result will be:

When you load the tool in modelbuilder (simply drag and drop) you will see that you can use it there:

Python script:

def main():
    import arcpy

    velocity = arcpy.GetParameter(0)
    mass = arcpy.GetParameter(1)
    component = arcpy.GetParameterAsText(2)

    dct_mat = {'ice': 1.8, 'iron': 7.3, 'rock': 2.3}
    comp = dct_mat[component]
    grav = 0.16667
    const = 0.007
    colrt = 1.3
    soil = 2.65
    power = 1.0/3.4
    vel = velocity * 1000.0
    kilotons = 4184000000000.0

    kinetic = (0.5 * mass * vel**2)
    energy = (kinetic * kilotons)
    part1 = (const * colrt * grav)
    part2 = (comp / soil)
    part3 = (energy * part2)
    part4 = (part3**power)
    crater = (part1 * part4)
    final = (crater / int(1000))

    arcpy.SetParameter(3, final)
    arcpy.AddMessage("Final: {}".format(final))

if __name__ == '__main__':
    main()
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Re: help turning input into user input in arcgis

XanderBakker — Fri, 10 Nov 2017 21:33:15 GMT

... and it would be good to mention the units for mass and velocity in the interface

Re: help turning input into user input in arcgis

DanPatterson_Retired — Fri, 10 Nov 2017 21:34:34 GMT

Love the folder title xander_bakker‌.. but where is the map?

Re: help turning input into user input in arcgis

bradbrewer — Fri, 10 Nov 2017 21:47:44 GMT

this is an extremely big help thank you so much. this is my first time trying to bring python to arcgis.

Re: help turning input into user input in arcgis

DanPatterson_Retired — Fri, 10 Nov 2017 21:50:45 GMT

Brad... you have some catching up to do... the Py links ....

Re: help turning input into user input in arcgis

bradbrewer — Fri, 10 Nov 2017 21:53:53 GMT

i'm a student at Illinois state and none of my professors know anything about python or how it works with arcgis. Thanks for the links i will be sure to start looking into them.

Re: help turning input into user input in arcgis

DanPatterson_Retired — Fri, 10 Nov 2017 21:56:38 GMT

sadly... only a few of my students know about python or how it works with ArcGIS.

Re: help turning input into user input in arcgis

bradbrewer — Fri, 10 Nov 2017 22:06:44 GMT

i wish we had a class that focused on using python to create models in arcgis. I think i may propose it to our department though so that other students don't get stuck like i did.

Re: help turning input into user input in arcgis

XanderBakker — Fri, 10 Nov 2017 22:14:56 GMT

About the folder title, I thought let´s keep it small...

Re: help turning input into user input in arcgis

XanderBakker — Fri, 10 Nov 2017 22:15:54 GMT

That would be great! Hope they will accept it

Re: help turning input into user input in arcgis

DanPatterson_Retired — Fri, 10 Nov 2017 22:19:37 GMT

You might get a kick out of a couple of my blog posts

you-are-not-allowed-to-use-modelbuilder-when-instructors-need-to-get-smarter

you-are-not-allowed-to-use-geoprocessing-results-the-students-get-smarter