Latest Contributions by ThomasDilts

Hi, I'm able to run scripts as tools in ArcToolbox but I can't seem to run them from IDLE directly since upgrading to 10.1.  Initially I had SP1 for background geoprocessing but have since rolled that back thinking that it might help.  The same problem occurs.  I get the following error in IDLE: Python 2.7.3 |EPD 7.3-2 (64-bit)| (default, Apr 12 2012, 15:20:16) [MSC v.1500 64 bit (AMD64)] on win32 Type "copyright", "credits" or "license()" for more information. >>> ================================ RESTART ================================ >>> Traceback (most recent call last):   File "X:\for_tdilts\outbox\GIS_tools_scripts\ClimaticWaterDeficit\Version10_1\extras\DurCWD_normal.py", line 6, in <module>     import arcpy   File "C:\Program Files (x86)\ArcGIS\Desktop10.1\arcpy\arcpy\__init__.py", line 21, in <module>     from arcpy.geoprocessing import gp   File "C:\Program Files (x86)\ArcGIS\Desktop10.1\arcpy\arcpy\geoprocessing\__init__.py", line 14, in <module>     from _base import *   File "C:\Program Files (x86)\ArcGIS\Desktop10.1\arcpy\arcpy\geoprocessing\_base.py", line 14, in <module>     import arcgisscripting ImportError: DLL load failed: %1 is not a valid Win32 application. >>> Is it that ArcGIS somehow is managing to point to 64 bit python but IDLE needs to be directed there?  Is there some sort of document with instructions that I need to be following for "post-install" of ArcGIS Desktop??? -Tom ... View more

I'm getting a traceback error when running OLS.  According to http://downloads.esri.com/support/downloads/other_/189810.1_SP1_Announcement.pdf this was noted as a bug - NIM080983 - OLS (Ordinary Least Squares) returns a traceback when some of the data written to the coefficient table is NaN (not a number).  Does anybody know if this has been addressed or will be addressed?  I've got 10.1 SP1 and in the issues addressed document it doesn't list this bug fix anywhere http://downloads.esri.com/support/downloads/other_/ArcGIS101sp1-issues.htm . -Tom Dilts ... View more

Currently flow accumulation in Spatial Analyst can only accomodate positive values - all negative values are treated as zero.  I'd recommend creating an option (or a new tool) for flow accumulation for negative values (per http://forums.esri.com/Thread.asp?c=93&f=995&t=243378).  Even better would be an option for accomodating flows of things like water that can start out positive but when they go negative they can't go less than zero.  To my knowledge this hasn't been worked out by anyone in the ArcGIS community yet (see http://gis.stackexchange.com/questions/49462/how-can-i-get-weighted-flow-accumulation-to-deal-with-negative-values) but it would be a tremendous resource for people who model flows of water but deal with weightings having to do with precipitation and evapotranspiration. ... View more

Since version 10 color ramps in the legend include annoying little tic lines (see http://gis.stackexchange.com/questions/41788/annoying-little-line-in-color-ramp-legends-how-do-i-remove-it#_=_  for a discussion on the issue).  Esri should revert back to the way things were in 9.x when there weren't tic marks or give the user a checkbox to disable the little tic marks in the legend.  The current solution involves converting to the legend to a graphic, ungrouping about 100 times, and then creating a gradient fill.  This is ridiculously complicated for something that should be very simple. ... View more

ArcGIS Help claims that it is possible to perform multi-line statements in the raster calculator but I have not been able to do so http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Building_complex_statements/00p60000000p000000/ I'm wondering if this is a case of false advertising or if I'm missing something? My multi-line statement is relatively simple although I'm planning on eventually making it more complicated t1 = Raster(r"forest.tif") t2 = Raster(r"forest.tif") * 2 t1 + t2 -Tom Dilts ... View more