Shadow Analysis - Stuck!

ChaseNorris — Sun, 15 Jun 2014 13:21:51 GMT

Hello,

This all started because I used the sun shadow volume tool, but I didn't like how the shadow enveloped the buildings. I want to the be able to see the buildings separate from their shadow.

I'm trying to recreate the type of analysis seen here. I downloaded the tutorial, but when I looked at the Skyline parameters, the box it says to check under Surface Options, "Use Refraction," is grayed out so that I can't check it. Since the point is to create silhouettes instead of a skyline, I checked the box "Create Silhouettes" under Skyline Options instead. I left everything else alone and clicked apply and ok. I validated the model and ran it, getting the following error:

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Executing (Create Sun Skymap): SunSkymap Buildings "(UTC-6:00) Central Time (US & Canada), Central America, Guadalajara, Mexico City" "3/21/2010 11:00:00 AM" # # # # # "C:\Users\Chase\Desktop\Shadows\Maps and GDBs\Shadows.gdb\Buildings_Sun" 7500 0
Start Time: Sun Jun 15 08:49:36 2014
Running script SunSkymap...

Traceback (most recent call last):
File "C:\Users\Chase\Desktop\Shadows\Maps and GDBs\Sun_tools\ClassSunSkyMap.py", line 15, in <module>
import arcpy, ephem
File "C:\Users\Chase\Desktop\Shadows\Maps and GDBs\Sun_tools\ephem\__init__.py", line 5, in <module>
import ephem._libastro as _libastro
File "C:\Users\Chase\Desktop\Shadows\Maps and GDBs\Sun_tools\ephem\_libastro.py", line 1
SyntaxError: Non-ASCII character '\x90' in file C:\Users\Chase\Desktop\Shadows\Maps and GDBs\Sun_tools\ephem\_libastro.py on line 1, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details

Failed to execute (Create Sun Skymap).
Failed at Sun Jun 15 08:49:38 2014 (Elapsed Time: 2.00 seconds)

===

Does anyone know why this is happening? I downloaded Python 2.6 as well as PyEphem.

Re: Shadow Analysis - Stuck!

PopescuAndreea-Roxana — Sun, 15 Mar 2015 10:59:03 GMT

hello,

do you know how to fix this?

Re: Shadow Analysis - Stuck!

KhalidDuri1 — Mon, 23 Mar 2015 22:21:37 GMT

Hi Chase,

Please try the sun skymap tool available with 3D Samples to generate the output points and let me know if you have any other issues:

http://links.esri.com/3dsamples

It has been updated to no longer require PyEphem, and resolves a few bugs with the old tool.

Regards,

Khalid

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